chunk_uid
stringlengths
40
40
chunk_type
stringclasses
2 values
chunk_index
int64
0
6.71k
total_chunks
int64
1
6.71k
section_title
stringlengths
1
157
embed_text
stringlengths
1
83.3k
spans
dict
paper_doi
stringlengths
0
63
paper_id_arxiv
stringlengths
9
16
title
stringlengths
7
245
authors
listlengths
1
768
categories
listlengths
1
7
year
int64
2k
2.02k
language
stringclasses
2 values
discipline
stringclasses
8 values
dense_vector
listlengths
1.02k
1.02k
70a29dab0deca9a5e390081ae09b28475f05f207
subsection
30
38
Proof of the statement
\left( \Gamma (v_L,\Omega _R)-\Gamma (v_R,\Omega _L) + P_{\text{ct}}(v_L^{\Omega ^{-1}_R},v_R^{\Omega ^{-1}_L}) \right)\Big |_{\Omega _R=1,\Omega _L=m_{RL}^{-1}} \right] \\ &=& \frac{1}{2}\left[ \Gamma (v_R,m_{RL}^{-1})-\Gamma (v_L,m_{LR}^{-1}) + P_{\text{ct}}(v_R,v_L^{m_{LR}}) - P_{\text{ct}}(v_L,v_R^{m_{RL}}) \right]...
{ "cite_spans": [] }
10.1140/epjc/s10052-008-0782-4
0807.1696
The invariant factor of the chiral determinant
[ "L. L. Salcedo" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.0696839839220047, 0.036367472261190414, -0.0003413264057599008, -0.04643564671278, -0.03847263753414154, 0.020578742027282715, 0.02407209388911724, 0.044727109372615814, 0.005819710902869701, -0.02584165148437023, -0.012699631042778492, 0.020121097564697266, -0.021951673552393913, 0.001...
8e94e9874afd2ac523bee90da2ba69f05f3ac357
subsection
31
38
Explicit Klein-Gordon form
The operators K_{R,L} can be brought to a manifest Klein-Gordon form if desired. Indeed,K_R &=& m_{RL}m_{LR}- \mathrel {\mathop {\!\!\!/}}_R m_{LR}^{-1} \mathrel {\mathop {\!\!\!/}}_L m_{LR}\\ &=& m_{RL}m_{LR}- \mathrel {\mathop {\!\!\!/}}_R^{\,\,2} -\mathrel {\mathop {\!\!\!/}}_Rm_{LR}^{-1}(\mathrel {\mathop {\!\!\!/}...
{ "cite_spans": [] }
10.1140/epjc/s10052-008-0782-4
0807.1696
The invariant factor of the chiral determinant
[ "L. L. Salcedo" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.02668723464012146, 0.0497124120593071, -0.024276379495859146, -0.024078018963336945, -0.03494212031364441, 0.013046074658632278, 0.010482635349035263, 0.028701364994049072, 0.025329221040010452, 0.02671775035560131, 0.0027503566816449165, 0.0006580257322639227, -0.011230305768549442, 0....
3de8b6462db544de44bf3eb85059054f04e2cbf8
subsection
32
38
Explicit Klein-Gordon form
This gives (using (REF ))W^+ &=& -\frac{1}{4}{\rm Tr}\log ({\tilde{M}}_R - ({\tilde{D}}^R_\mu )^2 ) -\frac{1}{4}{\rm Tr}\log ({\tilde{M}}_L - ({\tilde{D}}^L_\mu )^2 ) , \\ W^-_c &=& \frac{1}{4}{\rm Tr}\left(\gamma _5\log ({\tilde{M}}_R - ({\tilde{D}}^R_\mu )^2 ) \right) -\frac{1}{4}{\rm Tr}\left(\gamma _5\log ({\tilde{...
{ "cite_spans": [] }
10.1140/epjc/s10052-008-0782-4
0807.1696
The invariant factor of the chiral determinant
[ "L. L. Salcedo" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.047633517533540726, 0.05169197544455528, -0.008055892772972584, 0.020658481866121292, -0.04583314433693886, -0.036892324686050415, 0.03500041365623474, 0.03597688302397728, -0.002900807885453105, 0.038967330008745193, -0.017790095880627632, -0.00697643356397748, -0.019941385835409164, 0...
bfe856b74e7f6592a3faaf94fd4c593015127c3a
subsection
33
38
Direct computation of the leading order in two dimensions
In this section we carry out explicitly the computation of W_c^- in two dimensions to LO in the derivative expansion. This verifies the identification (REF ) in this case and illustrates its use.To this end we apply the convenient method of Chan to compute the trace of the logarithm of K_R. This takes the form{\rm Tr}...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 292, "openalex_id": "", "raw": "L.-H. Chan, Phys. Rev. Lett. 57, 1199 (1986).", "source_ref_id": "4f671e201a38434bd7c0ee45dbdc9ab9aa94894d", "start": 195 } ] }
10.1140/epjc/s10052-008-0782-4
0807.1696
The invariant factor of the chiral determinant
[ "L. L. Salcedo" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.048154041171073914, 0.02812037244439125, -0.019194481894373894, 0.007743401452898979, -0.014746793545782566, 0.06847760826349258, 0.022276584059000015, 0.009398887865245342, 0.010482200421392918, 0.030027614906430244, 0.0035188610199838877, 0.005012231413275003, -0.010436426848173141, 0...
53602f6429f594cd26b87068a2e5a28958895e33
subsection
34
38
Direct computation of the leading order in two dimensions
IntroducingN_R= (p^2+m_{RL}m_{LR})^{-1}one finds-{\rm tr \,}\left(\gamma _5\log ({\tilde{N}}_R)\right) &=& -{\rm tr \,}(\gamma _5\log N_R) +{\rm tr \,}\!\left( \gamma _5 \,N_R\left( -\frac{1}{2}\sigma _{\mu \nu } F^R_{\mu \nu } + (B^R_\mu )^2 -[D^R_\mu , B^R_\mu ] \right)\right) +{\mathcal {O}}(D^4) , \\ {}[{\tilde{D}}...
{ "cite_spans": [] }
10.1140/epjc/s10052-008-0782-4
0807.1696
The invariant factor of the chiral determinant
[ "L. L. Salcedo" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.05449436604976654, 0.011510637588799, -0.032830871641635895, -0.0028604965191334486, -0.0157899409532547, 0.0154695650562644, 0.027170902118086815, 0.03365469351410866, 0.03728561848402023, 0.05089395120739937, -0.025553768500685692, 0.00829925388097763, 0.010747838765382767, 0.01212850...
c529c6af478c1b0915aa47ee63b8020b06077e5f
subsection
35
38
Direct computation of the leading order in two dimensions
Similarly, the identity\int d^2x\epsilon _{\mu \nu }{\rm tr \,}\!\left( \frac{1}{2}N_R F^R_{\mu \nu }-\frac{1}{2}N_L F^L_{\mu \nu } \right) = \int d^2x\epsilon _{\mu \nu }{\rm tr \,}\!\Big ( -N_R(D_\mu m)_{RL}N_L(D_\nu m)_{LR} \Big )allows to bring the second term to an UV convergent form (up to terms which are symmetr...
{ "cite_spans": [] }
10.1140/epjc/s10052-008-0782-4
0807.1696
The invariant factor of the chiral determinant
[ "L. L. Salcedo" ]
[ "hep-th" ]
2,008
en
Physics
[ 0.020521963015198708, 0.040647219866514206, -0.009780355729162693, 0.012313177809119225, -0.020811865106225014, 0.006503707729279995, 0.02595379948616028, -0.00022386295313481241, 0.02688453532755375, 0.03182811662554741, -0.00989479012787342, -0.010230465792119503, 0.012343693524599075, -...
2e95c9169d9e5d87572c13f930ea2413fcdf7217
subsection
36
38
Direct computation of the leading order in two dimensions
One can now take matrix elements to compute the trace in (REF ). In doing so m_{RL}m_{LR} and m_{LR}m_{RL} are replaced by their eigenvalues and the momentum integral becomes straightforward. This givesThe limit m_j^2\rightarrow m_i^2 is finite and it correctly reproduces the contribution from diagonal matrix elements....
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1086, "openalex_id": "", "raw": "L. L. Salcedo, Eur. Phys. J. C20, 161 (2001), [hep-th/0012174].", "source_ref_id": "deced4c4477f6595cb3cf2a4e4377627e12f2c2d", "start": 757 }, { "arxiv_id": "", "doi...
10.1140/epjc/s10052-008-0782-4
0807.1696
The invariant factor of the chiral determinant
[ "L. L. Salcedo" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.012490840628743172, 0.031528498977422714, -0.024569643661379814, -0.022738365456461906, -0.007882124744355679, 0.03259674459695816, 0.016649367287755013, 0.020357705652713776, 0.017961783334612846, 0.027118172496557236, -0.026874002069234848, 0.02148699201643467, 0.03558783233165741, 0....
11355d099ae69d11a8d50ac78553e648a55da4c5
subsection
37
38
Conclusions
In this work we have found a remarkable result, namely, there is a local operator, {\bf K}, which correctly reproduces the non-trivial chiral invariant factor of {\rm Det\,}{\bf D}. Moreover, such operator is explicitly constructed. This allows to address a direct non perturbative definition of the chiral determinant a...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 821, "openalex_id": "", "raw": "L. L. Salcedo, Eur. Phys. J. C20, 161 (2001), [hep-th/0012174].", "source_ref_id": "deced4c4477f6595cb3cf2a4e4377627e12f2c2d", "start": 567 }, { "arxiv_id": "", "doi"...
10.1140/epjc/s10052-008-0782-4
0807.1696
The invariant factor of the chiral determinant
[ "L. L. Salcedo" ]
[ "hep-th" ]
2,008
en
Physics
[ -0.053079694509506226, 0.03595623001456261, -0.03269025683403015, 0.030797822400927544, -0.024647414684295654, 0.003056126879528165, 0.0373908132314682, 0.012628939002752304, 0.010431274771690369, 0.03577309101819992, -0.002232002792879939, -0.006451823282986879, 0.007100439630448818, 0.03...
4bf56581303c668701c608875e8bc79c8a1c201b
abstract
0
16
Abstract
Since the order of elliptic type model equation (Laplace equation) is two [1], [2], then it is natural the order of composite type model equation must be [3] [4] [5] three. At each point of the domain under consideration these equations have both real and complex characteristics. Notice that a boundary value problem fo...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.025845326483249664, -0.025906354188919067, 0.0012501189485192299, -0.01064174436032772, -0.0097186965867877, 0.010245063342154026, 0.011046054773032665, 0.008337940089404583, 0.010107750073075294, -0.0117631321772933, -0.029949454590678215, 0.015485836192965508, -0.004485552664846182, 0...
6aba910f27eee46707ac4a9ec44a11f1c08d7f04
subsection
1
16
Introduction.
The paper is devoted to the investigation of boundary value problems for a composite type equation of second order.This was possible as earlier we investigated an elliptic type boundary value problem of first order ( Cauchy-Riemann equation) for which the boundary is a carrier of boundary conditions [7]. Notice that in...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.014838194474577904, 0.012763136066496372, 0.0016144642140716314, -0.007030023727566004, -0.023420697078108788, 0.00829260516911745, 0.033200934529304504, 0.03585578873753548, 0.04842820391058922, 0.00008683824125910178, -0.01801944151520729, 0.011824782006442547, 0.00862827617675066, 0....
b4c7536e9cb58c49ab6340c2a3444c8bf5c0d240
subsection
2
16
Problem statement
Let's consider the following boundary value problem:\ell \, u\equiv \frac{\partial ^{2} u(x)}{\partial x_{2}^{2} } +i\frac{\partial ^{2} u(x)}{\partial x_{1} \, \partial x_{2} } =0,\, \, \, \, \, x\in D,\ell _{k} u\equiv \left. \frac{\partial u(x)}{\partial \, x_{2} } \right|_{x_{2} =\gamma _{k} (x_{1} )} +\alpha _{k} ...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.05580059438943863, 0.007550927810370922, -0.039508894085884094, -0.05628873407840729, -0.024681618437170982, 0.026390111073851585, 0.04475640878081322, 0.06626511365175247, 0.039173297584056854, 0.007955169305205345, -0.015101855620741844, 0.01987648196518421, -0.015956101939082146, 0.0...
9a619742ca210c85f52eef2c7784e08f29f58c42
subsection
3
16
Fundamental solution.
Applying the Fourier transform to equation (REF ) we get a fundamental solution in the formU(x-\xi )=\frac{-1}{4\pi ^{2} } \int _{R^{2} }\frac{e^{i(\alpha ,\, x-\xi )} }{\alpha _{2} (\alpha _{2} +i\, \alpha _{1} )} d\alpha ,where(\alpha _{1} x-\xi )=\sum _{j=1}^{2}\alpha _{j} (x_{j} -\xi _{j} ) .Further, since\frac{1}{...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.044481340795755386, -0.007894065231084824, -0.036183036863803864, 0.01767965406179428, -0.015864402055740356, 0.022652534767985344, 0.05787455663084984, 0.039844054728746414, 0.04109490290284157, 0.010525420308113098, -0.01751185767352581, 0.023384736850857735, 0.002028812887147069, 0.0...
be4a7cce6d047c205eb8fa8130fc7228f588e19e
subsection
4
16
Necessary conditions.
Multiplying equation (REF ) by fundamental solution (REF ) and integrating if in domain D, applying Ostrogradskii-Gauss formula [8], we get formula similar to Green's second formula that after application of fundamentality properties of function (REF ) get the form:\int _{a_{1} }^{b_{1} }\left. \left[u(x)\frac{\partial...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.04244394600391388, 0.028835030272603035, -0.04930942878127098, -0.03710412606596947, -0.03985031694173813, 0.020810043439269066, 0.03991134464740753, -0.00198908313177526, 0.0393926203250885, 0.009039553813636303, -0.026149863377213478, 0.006327687297016382, 0.006037811283022165, 0.0249...
79ee10d33eb5239d05f83ad48c7fb4a8d3f6fc95
subsection
5
16
Necessary conditions.
\frac{\partial u(x)}{\partial x_{2} } \right|_{x_{2} =\gamma _{1} (x_{1} )} U(x_{1} -\xi _{1} ,\gamma _{1} (x_{1} )-\gamma _{1} (\xi _{1} ))\left[1-i\gamma ^{\prime }_{1} (x_{1} )\right]dx_{1}In exactly the same way to [9] and [10], we get the following necessary conditions:\left. \frac{\partial u(\xi )}{\partial \xi _...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.04321402683854103, 0.02673410065472126, -0.06189127638936043, -0.01571696624159813, -0.02481144294142723, 0.0027333025354892015, 0.02214108407497406, 0.03592013195157051, 0.01243623998016119, 0.012657498009502888, -0.02853468619287014, -0.013611197471618652, -0.005767974071204662, 0.010...
872b9166a9f1f75571531edd73a03a2a9ec13c78
subsection
6
16
Necessary conditions.
\frac{\partial U(x-\xi )}{\partial x_{2} } \right|_{\begin{array}{l} {x_{2} =\gamma _{2} (x_{1} )} \\ {\xi _{2} =\gamma _{1} (\xi _{1} )} \end{array}} \left[1-i\gamma ^{\prime }_{2} (x_{1} )\right]dx_{1} --2\int _{a_{1} }^{b_{1} }\left. \frac{\partial u(x)}{\partial x_{2} } \right|_{x_{2} =\gamma _{1} (x_{1} )} \left. ...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.04077461361885071, 0.01919702999293804, -0.05102930963039398, -0.0067716073244810104, -0.03555570915341377, 0.009941864758729935, 0.039309658110141754, 0.052524782717227936, 0.007599460426717997, 0.006065834313631058, -0.03123713843524456, 0.009003376588225365, -0.0037482278421521187, 0...
aecc112a9bda6ee5dda480ec50eb718e18722eb4
subsection
7
16
Necessary conditions.
\frac{\partial U(x-\xi )}{\partial x_{2} } \right|_{\begin{array}{l} {x_{2} =\gamma _{2} (x_{1} )} \\ {\xi _{2} =\gamma _{2} (\xi _{1} )} \end{array}} \left[1-i\gamma ^{\prime }_{2} (x_{1} )\right]dx_{1} ,\left. \frac{\partial u(\xi )}{\partial \xi _{2} } \right|_{\xi _{2} =\gamma _{2} (\xi _{1} )} =2\int _{a_{1} }^{b_...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.05316786468029022, 0.019838755950331688, -0.02988021820783615, -0.040135327726602554, -0.022829828783869743, 0.031467318534851074, 0.026355022564530373, 0.025485171005129814, 0.023424992337822914, 0.01671033538877964, -0.016801899299025536, 0.021822631359100342, -0.020769650116562843, 0...
97c325ea2502b6340918481c1e4e0253defc7393
subsection
8
16
Regularization.
As it was said above, necessary conditions (REF )–(REF ) contain singular addends.Considering (REF ), we have:\left. \frac{\partial U(x-\xi )}{\partial x_{2} } \right|_{\begin{array}{l} {x_{2} =\gamma _{k} (x_{1} )} \\ {\xi _{2} =\gamma _{k} (\xi _{1} )} \end{array}} =\frac{1}{2\pi } \cdot \frac{1}{\gamma _{k} (x_{1} )...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.05369982495903969, 0.01920684054493904, -0.029306069016456604, -0.02061035856604576, -0.033745456486940384, 0.017406675964593887, 0.048848532140254974, 0.021800298243761063, 0.009504258632659912, 0.0067010363563895226, -0.017376163974404335, -0.002238763961941004, -0.022288478910923004, ...
6ccb213bd22bea9c40479b793d7736bedcbf2fe6
subsection
9
16
Regularization.
\frac{\partial u(\xi )}{\partial \xi _{1} } \right|_{\xi _{2} =\gamma _{1} (\xi _{1} )} +i\left. \frac{\partial u(\xi )}{\partial \xi _{2} } \right|_{\xi _{2} =\gamma _{1} (\xi _{1} )} ==\frac{1}{\pi } \int _{a_{1} }^{b_{1} }\left. \frac{\partial u(x)}{\partial x_{2} } \right|_{x_{2} =\gamma _{2} (x_{1} )} \frac{dx_{1}...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.0467924065887928, 0.018649810925126076, -0.028417306020855904, -0.0008999640122056007, -0.03110336698591709, -0.007764395326375961, 0.033850476145744324, 0.04389268159866333, 0.006558720488101244, 0.009202811866998672, -0.03629234805703163, 0.0023178723640739918, -0.008821268565952778, ...
080113fcec30157dfe99cea4d3eafc3204e1da19
subsection
10
16
Regularization.
\frac{\partial u(x)}{\partial x_{2} } \right|_{x_{2} =\gamma _{2} (x_{1} )} \frac{dx_{1} }{x_{1} -\xi _{1} } + ......where the sum of non-singular addends are denoted by dots.Considering boundary conditions (REF ), from necessary conditions (REF ) for boundary values of the unknown function we get the following regular...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.04227566346526146, 0.03632349520921707, -0.05875859409570694, -0.013964705169200897, -0.012499555945396423, 0.004796075168997049, 0.04535858333110809, 0.030798660591244698, 0.04609115794301033, 0.01658976450562477, -0.015513795427978039, 0.014590445905923843, 0.002642228966578841, 0.017...
1539e7594cd9714ff2826593286cebf7055dc4b8
subsection
11
16
Regularization.
Thus we proved the following statement:Theorem 3. When fulfilling the conditions of Theorem 2 if \varphi _{k} (x_{1} ), k=1,\, 2 are continuously differentiable functions vanishing at the end of the interval (a_{1} ,\, b_{1} ), then (REF ) are regular relations.
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.017139101400971413, 0.01599445939064026, -0.0011494109639897943, -0.02420535497367382, -0.027883470058441162, 0.027227208018302917, 0.015704482793807983, 0.018299004063010216, 0.01942838355898857, -0.0014680029125884175, 0.008035384118556976, -0.016498101875185966, 0.009714191779494286, ...
ee21f2dced80a6cc6539b183d308ad848deb45d3
subsection
12
16
Fredholm property.
Considering boundary conditions (REF ), the first necessary condition (REF ) not containing singular integrals leads to regular relation (REF ).Further, proceeding from boundary conditions, after regularizing two necessary conditions given in (REF ), that contain singular integrals, we get a relation that has no singul...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.02583397552371025, 0.032258134335279465, 0.00428785989060998, -0.029129981994628906, -0.021683448925614357, 0.024781083688139915, 0.02526938170194626, 0.024613231420516968, 0.01263469085097313, -0.006878124084323645, -0.025544049218297005, -0.0037633220199495554, 0.008415497839450836, 0...
e0db709ee841f02e3b4f1956f92507a65bcd2b10
subsection
13
16
The inverse problem in Tikhonov-Lavrent'ev sense.
Let's consider the problem\frac{\partial ^{2} u(x)}{\partial x_{2}^{2} } +i\frac{\partial ^{2} u(x)}{\partial x_{1} \partial x_{2} } =0,\, \, \, \, x\in D,\left. \frac{\partial u(x)}{\partial x_{2} } \right|_{x_{2} =\gamma _{k} (x_{1} )} +\alpha _{k} u(x_{1} ,\gamma _{k} (x_{1} ))=\varphi _{k} (x_{1} ),\, \, \, \, k=1,...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.01708832196891308, 0.021955441683530807, -0.05663558095693588, -0.004214865155518055, -0.029309524223208427, 0.013601998798549175, 0.06298267096281052, 0.04735906422138214, 0.0190260149538517, -0.004123320337384939, -0.01820211485028267, -0.03960828855633736, -0.02912643551826477, -0.00...
36bdc82585754660d642303b2d36f3374ce0783d
subsection
14
16
Stephan's inverse problem.
The above mentioned boundary value problem (REF ),(REF ), is given provided \alpha _{k} ,\, \, \varphi _{k} (x_{1} ), k=1,\, 2, \gamma _{1} (x_{1} ), \alpha _{k} (x_{1} ), k=\overline{1,\, 4} è \varphi _{3} (x_{1} ) - are the known, u(x), x\in D è \gamma _{2} (x_{1} ), x_{1} \in [a_{1} ,\, b_{1} ] are the unknown funct...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.02721250429749489, 0.012583684176206589, -0.03540830314159393, -0.0422762967646122, -0.023122234269976616, 0.008066073060035706, 0.05537126213312149, 0.03843022137880325, 0.009210738353431225, 0.004456562455743551, -0.008485783822834492, 0.002876924816519022, 0.015018004924058914, 0.006...
7b923f809dbe64fd4e25c2085dbc3390f6043179
subsection
15
16
Reference
1. Courant, R. and Hilbert, D. Methods of mathematical physics, 1-2 Interscience, 1953 - 19622. Bitsadze, A.V. Boundary value problems for second order elliptic equations, North - Holland, 19683. Hadamard, Tohoku, Math., J., vol. 37, pp. 133-150, 19334. Hadamard, L'Enseignement Math. Vol. 35, pp. 5 -42, 19365. Jurayev ...
{ "cite_spans": [] }
0807.1697
Investigation of solutions of boundary value problems for a composite type equation with non-local boundary conditions
[ "N. A. Aliev", "A. M. Aliev" ]
[ "math.AP" ]
2,008
en
Mathematics
[ -0.023075366392731667, 0.004849337041378021, -0.01602455973625183, 0.00024466071045026183, 0.012552572414278984, 0.049264077097177505, 0.058695677667856216, 0.006470870226621628, 0.018527444452047348, 0.010606733150780201, -0.02824901044368744, 0.020068854093551636, -0.005265212617814541, ...
3e8f4de458bfce8181dce49a7f8c0bef133f22b1
abstract
0
15
Abstract
We present optical time series spectroscopy of the pulsating white dwarf star G29-38 taken at the Very Large Telescope (VLT). By measuring the variations in brightness, Doppler shift, and line shape of each spectrum, we explore the physics of pulsation and measure the spherical degree ($\ell$) of each stellar pulsation...
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.08336623013019562, -0.024961046874523163, -0.011343849822878838, -0.011839713901281357, -0.004882356151938438, 0.020154977217316628, -0.03451215475797653, -0.01714927703142166, 0.04388017579913139, 0.009535851888358593, -0.021695969626307487, 0.0017946473089978099, 0.000755239452701062, ...
7baf64268e69ca604d861fa4737777610765cf49
subsection
1
15
Introduction
DAVs, or ZZ Cetis, are variable white dwarf stars with hydrogen atmospheres. They are the coolest known white dwarf pulsators and reside in an instability strip near 12,000 K. Their pulsations are multi-periodic with amplitudes as high as 5 per cent and periods between 70 s and 1100 s. In the past few years the number ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 395, "openalex_id": "", "raw": "Voss, B., Koester, D., Østensen, R., Napiwotzki, R., Homeier, D., & Reimers, D. 2007, in Astronomical Society of the Pacific Conference Series, Vol. 372, 15th European Workshop on White Dwarfs, ed. ...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.027314558625221252, -0.041627999395132065, -0.058535557240247726, 0.002222169190645218, 0.004295557737350464, 0.009903435595333576, 0.016053026542067528, -0.013725947588682175, 0.029252519831061363, 0.041170213371515274, -0.04532080516219139, 0.02694833092391491, -0.004299372900277376, ...
04e49e9b82cb94ad72a97246409d9f26d3d4abe1
subsection
2
15
Introduction
It has an abundance of modes, but they are not all excited simultaneously and many observation runs are necessary to measure them all. compiled 10 years of photometric observations and found a possible series of \ell =1 modes on G 29-38. Time series spectroscopy taken at the Keck Observatory with the LRIS spectrograph ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2355, "openalex_id": "", "raw": "Clemens, J. C., van Kerkwijk, M. H., & Wu, Y. 2000, MNRAS, 314, 220", "source_ref_id": "7d015aed4cf78501abc897507799648868fd3b28", "start": 2232 }, { "arxiv_id": "", ...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.06660240143537521, -0.002916907425969839, -0.06318376213312149, 0.011080050840973854, -0.030477771535515785, -0.0032488510478287935, -0.025685572996735573, -0.0071730357594788074, 0.02460198663175106, 0.019809788092970848, -0.045052770525217056, 0.007363807875663042, 0.045937951654195786,...
c0829c5773a06f58fdf0243d18100f0675cfb844
subsection
3
15
Observations
We present a 6.14 hour spectral series (604 spectral images) of G29-38 from the VLT, observed with the FORS1 spectrograph on August 27, 1999 starting at 03:00:19.67 UT. The average exposure time on each image is 16.0 s with a readout time of 16.0 s. We perform a standard reduction on each image using routines in IRAF. ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 169, "openalex_id": "", "raw": "Moehler, S., Seifert, W., Appenzeller, I., & Muschielok, B. 1995, in Calibrating and Understanding HST and ESO Instruments, ed. P. Benvenuti, 149", "source_ref_id": "a4e4aebfdeb86de32366c57c96...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.005103697068989277, -0.02218467928469181, -0.05685014650225639, -0.030652696266770363, 0.012137491255998611, -0.0570942722260952, 0.007716576103121042, 0.009825951419770718, -0.0041653490625321865, -0.0010594557970762253, 0.004691739100962877, 0.00738472118973732, -0.01194677036255598, ...
c970a8c63c41204f75ddbfef4f94cb4df8d82c76
subsection
4
15
Periodicities
Time series spectroscopy of pulsating white dwarfs provides the opportunity to measure both the variations in brightness of the star and the radial velocity of the gas along the surface of the star. We find periodic variations in our measurements of both the light and velocity curves. We create a light curve by averagi...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1396, "openalex_id": "", "raw": "Lenz, P., & Breger, M. 2005, Communications in Asteroseismology, 146, 53", "source_ref_id": "99008f48961a2ce97e2ef949e63c3f874a3672d7", "start": 1236 }, { "arxiv_id": "", ...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.03972895070910454, -0.011190931312739849, -0.052971936762332916, -0.000176765417563729, 0.020718861371278763, 0.00024029608175624162, -0.03765401244163513, 0.034205954521894455, 0.03667757287621498, 0.03847788646817207, -0.030879953876137733, -0.017820052802562714, 0.017057206481695175, ...
c84b67a8c38df2aa1b98c97b8c2ab5e75a295b67
subsection
5
15
Periodicities
However, since the light curve fixes the frequency, for a velocity mode to have less than 0.1 per cent chance of being due to noise it simply needs an amplitude greater than 1.47 km s^{-1}. Only the modes F1, F2 and the combination of F1+F2 have velocity amplitudes greater than this limit.We compare the observed veloci...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 591, "openalex_id": "", "raw": "Thompson, S. E., Clemens, J. C., van Kerkwijk, M. H., & Koester, D. 2003, ApJ, 589, 921", "source_ref_id": "761158165784ea3b66901b00acf1b2bac27b8ffb", "start": 478 }, { "ar...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.022203633561730385, -0.004791711922734976, -0.051762696355581284, -0.01642000675201416, -0.003824594896286726, 0.009056946262717247, 0.014382765628397465, 0.04312540590763092, 0.04297280311584473, 0.0029719294980168343, -0.06592418998479843, -0.03491540253162384, 0.014199643395841122, -...
ea294e1148364e6b15776522e07d2484208c53e9
subsection
6
15
Periodicities
Since we have not resolved rotational splitting of our modes, use of combination modes to determine \ell is very uncertain. We only note that the first harmonic of F4 shows a larger value than the other harmonics.One curious feature in these time series is the modestly significant peak in the velocity FT at 2858\mu Hz ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 946, "openalex_id": "", "raw": "Wu, Y. 2001, MNRAS, 323, 248", "source_ref_id": "bdc3d819cc193e7cf13a8dd2b5ab4b61e0f5256d", "start": 825 }, { "arxiv_id": "", "doi": "", "end": 946, "open...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.04022315889596939, 0.01576271653175354, -0.036896660923957825, 0.03128128871321678, -0.003913975786417723, -0.0045701200142502785, 0.015945827588438988, 0.05227789655327797, -0.00827046763151884, 0.0006632968434132636, -0.0394296832382679, -0.03176958113908768, 0.0075380271300673485, -0...
ae02cc2d330a2dde5c4dff66fe8602734b544f5f
subsection
7
15
Mode identification of G 29-38
Due to differences in limb darkening across the spectral lines, the hydrogen spectral line shapes change according to the distribution of the pulsation across the surface of the star. As a result, chromatic amplitudes, wavelength dependent amplitude variations across the Balmer lines, have characteristic shapes that re...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 444, "openalex_id": "", "raw": "Robinson, E. L., et al. 1995, ApJ, 438, 908", "source_ref_id": "68014d3d7266929bb5007b0309b403503b638bd4", "start": 332 }, { "arxiv_id": "", "doi": "", "end": 1...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.02980639971792698, 0.0069899288937449455, -0.07698079198598862, 0.0005408419528976083, 0.0013239658437669277, -0.027715526521205902, -0.02654036320745945, 0.023198017850518227, 0.017398513853549957, 0.010576464235782623, -0.04917369410395622, 0.0060284323990345, 0.010813022963702679, -0...
0715ec3c0d77e2d0e93a41fb88be6e8974bbb4fa
subsection
8
15
How to measure spherical degree
We follow the procedure outlined by for fitting each spectral line with the combination of a Gaussian and a Lorentzian superimposed on a linear continuum. We fit each spectrum only allowing the area of the Gaussian and Lorentzian to vary along with the slope and intercept of the linear continuum. Prior to fitting we es...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 155, "openalex_id": "", "raw": "Thompson, S. E., Clemens, J. C., van Kerkwijk, M. H., O'Brien, M. S., & Koester, D. 2004, ApJ, 610, 1001", "source_ref_id": "d661d614e7f9228e26e80c74f4003a1fe8bec25e", "start": 0 }, ...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.025150587782263756, 0.006180817726999521, -0.04376934841275215, -0.03192659467458725, 0.00048812245950102806, -0.03027837723493576, 0.014643196947872639, -0.007512364536523819, 0.026981940492987633, 0.05948846414685249, -0.012025888077914715, 0.032750703394412994, 0.015154450200498104, ...
434a2f5e91668cbc42dc8f50a7ca816b08ab6f0f
subsection
9
15
How to measure spherical degree
The amplitude of the Gaussian EW corresponds to the central bump seen in the chromatic amplitudes, while the Lorentzian EW corresponds to the wings of the chromatic amplitudes. With only two parameters, the EW variation plot simplifies the comparison between observed pulsations and the models. In this paper we use the ...
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.05249621719121933, -0.011620892211794853, -0.039036430418491364, -0.025668207556009293, -0.012780692428350449, -0.08411603420972824, -0.0045590829104185104, -0.01931982859969139, 0.023211263120174408, 0.026522798463702202, -0.013314810581505299, 0.015382612124085426, 0.011071513406932354,...
e23c59fd498204a69a828063c5a3dd8b69be4b4a
subsection
10
15
Measured EW variations
We measure the periodic changes in the normalized EWs for the six largest modes of the VLT observations and perform the same analysis on the Keck time series spectroscopy of G 29-38 (VK00). With a consistent analysis we can compare the data sets to the models as well as to each other. Figures 5 and 6 show analysis of b...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2042, "openalex_id": "", "raw": "Kleinman, S. J., et al. 1998, ApJ, 495, 424", "source_ref_id": "500742f2e00c49ab4c577488ce3766d2e61f0a6a", "start": 1895 } ] }
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.03839646279811859, -0.01139990333467722, -0.055213991552591324, -0.02641664445400238, 0.0016596245113760233, -0.002849975833669305, -0.01945766620337963, 0.009492289274930954, 0.019854450598359108, 0.014978587627410889, -0.004318838939070702, 0.0019152448512613773, 0.007935675792396069, ...
570c882a2994acd8de9f4445c8212416f5156591
subsection
11
15
Noise simulations
To better understand how noise affects our measurement of spherical degree, we perform Monte Carlo simulations of model spectral series. Gaussian noise was introduced to both the overall brightness of the spectra and across the individual wavelengths of the model spectrum to match the noise observed in the VLT data. Th...
{ "cite_spans": [] }
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.010200493037700653, -0.006233210675418377, -0.03833005204796791, -0.018035875633358955, 0.027008038014173508, -0.022384626790881157, -0.025558453053236008, 0.025466900318861008, 0.02984617091715336, 0.01425169873982668, -0.02864072658121586, 0.026061993092298508, -0.007534021511673927, ...
6e95507f3a330ac9eeb2bdef532a1e399267c6ba
subsection
12
15
Discussion
Due to the limb-darkening variation across the spectral lines, periodic changes in the line shape reveal the distribution of the pulsation across the surface of the star. The observations of the line shape do not explicitly agree with the model, as seen in previous chromatic amplitudes (C00). However, the trends betwee...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1552, "openalex_id": "", "raw": "Thompson, S. E., Clemens, J. C., van Kerkwijk, M. H., O'Brien, M. S., & Koester, D. 2004, ApJ, 610, 1001", "source_ref_id": "d661d614e7f9228e26e80c74f4003a1fe8bec25e", "start": 1451 ...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.04765443131327629, 0.0117305563762784, -0.051132410764694214, 0.0008461368852294981, 0.003920354880392551, -0.02780858799815178, -0.007623336277902126, 0.05119342729449272, 0.003216750454157591, 0.003268233733251691, -0.058210406452417374, 0.000042366431443952024, 0.011883099563419819, ...
929267ce503338f270aaeaeb60f53d5a6e492607
subsection
13
15
Discussion
This could be the reason we observe line shape variations similar to \ell =4 modes, but not \ell =3; nonlinear mixing distorts the mode identification. In addition to our F4, these nonlinearities may be responsible for the unusual chromatic amplitudes seen on G 117-B15A by . Luckily, knowing that the mode is high \ell ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 275, "openalex_id": "", "raw": "Kotak, R., van Kerkwijk, M. H., & Clemens, J. C. 2004, A&A, 413, 301", "source_ref_id": "8d08f6b708328e5f71ead0efc727f6ee5131f2c1", "start": 152 }, { "arxiv_id": "", ...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.040766555815935135, -0.01333456952124834, -0.041376832872629166, -0.007987010292708874, -0.010893458500504494, -0.03588433563709259, 0.013059944845736027, 0.03383990377187729, -0.0018880469724535942, 0.021512292325496674, -0.04329920932650566, -0.006049378775060177, 0.027767639607191086, ...
20b2eaf8942fd2424185b6b187967644b56941f6
subsection
14
15
Conclusions
Time series spectroscopy has proven to be a useful tool to measure white dwarf pulsation. For G 29-38, it has revealed the physical motion of the pulsation through Doppler shifts and \ell through the variations of line shape. The three sets of spectroscopy on G 29-38, the VLT time series presented here, the Keck time s...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 544, "openalex_id": "", "raw": "Thompson, S. E., Clemens, J. C., van Kerkwijk, M. H., & Koester, D. 2003, ApJ, 589, 921", "source_ref_id": "761158165784ea3b66901b00acf1b2bac27b8ffb", "start": 227 }, { "ar...
10.1111/j.1365-2966.2008.13591.x
0807.1698
Deciphering the Pulsations of G 29-38 with Optical Time Series Spectroscopy
[ "Susan E. Thompson", "M. H. van Kerkwijk", "J. C. Clemens" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.07646848261356354, -0.01879672147333622, -0.03994303569197655, -0.00196816329844296, -0.004027869086712599, 0.006385087501257658, -0.024029899388551712, 0.0011433273321017623, 0.022138021886348724, 0.010725726373493671, -0.02833239734172821, 0.02767634205520153, 0.011641151271760464, -0...
99b03282798322b03c7eb9608ce5be6e79adb7b4
abstract
0
16
Abstract
We explore how inherent flexibility of a protein molecule influences the mechanism controlling the kinetics of allosteric transitions using a variational model inspired from work in protein folding. The striking differences in the predicted transition mechanism for the opening of the two domains of calmodulin (CaM) emp...
{ "cite_spans": [] }
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ 0.006847398821264505, -0.03128059580922127, -0.030960161238908768, -0.005672468803822994, -0.011619596742093563, -0.05017102509737015, 0.000820161949377507, 0.007617969531565905, -0.0016727489419281483, 0.052246224135160446, -0.026626653969287872, -0.011795073747634888, 0.002019887324422598,...
890d3f92c79b3b7509eef788f27ba8ad31b9d7e2
subsection
1
16
INTRODUCTION
To understand protein function, it is often essential to characterize large conformational changes that occur upon ligand binding. Within the population-shift mechanism of allosteric conformational change, the bound complex is formed when a ligand selects and stabilizes a weakly populated conformational ensemble from t...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 383, "openalex_id": "", "raw": "G. Weber, Biochemistry 11, 864 (1972).", "source_ref_id": "bca1b219e502e1d68b5f0fe7d931db04a92e3e64", "start": 131 }, { "arxiv_id": "", "doi": "", "end": 1537, ...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ 0.015789087861776352, -0.006807614117860794, -0.04234831780195236, -0.004073127172887325, -0.015529749915003777, -0.015651792287826538, 0.002488497644662857, 0.0063537731766700745, -0.005804587621241808, 0.026620250195264816, -0.037070032209157944, -0.014652579091489315, 0.013973724097013474...
34c52745e3078594ae35fb99937e5d7e7ec61cb7
subsection
2
16
INTRODUCTION
Aside from general theoretical implications, the results presented in this paper are interesting from the point of view of understanding the well-known and intensely studied thermodynamic differences between the two domains of CaM., Our approach is based on a coarse-grained variational model previously developed to cha...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 346, "openalex_id": "", "raw": "T. N. Tsalkova and P. L. Privalov, J. Mol. Biol. 181, 533 (1985).", "source_ref_id": "921bf09f3b6ed91283dffbf9d1a9f8ab15e861b8", "start": 0 }, { "arxiv_id": "", "doi"...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ 0.016902554780244827, -0.032157570123672485, -0.054551929235458374, -0.006639744620770216, -0.0057206302881240845, -0.045643001794815063, 0.0015541044995188713, 0.023157110437750816, -0.02593352273106575, 0.07175958156585693, -0.013248979113996029, -0.011090395040810108, 0.02407241240143776,...
d1c193bca202feed2cd74219908e42efcd64cde7
subsection
3
16
RESULTS
Conformational Flexibility of the CaM Domains.  We first compare the inherent flexibility of the two domains of CaM by calculating the mean-square fluctuations \mathcal {B}_i for each residue in the nCaM and cCaM for the open/closed conformational transitions of each domain. Fig. REF (a) shows \mathcal {B}_i along the ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2496, "openalex_id": "", "raw": "V. A. Likic, E. E. Strehler, and P. R. Gooley, Protein Sci. 12, 2215 (2003).", "source_ref_id": "b5371cbec84792fbbb7104174d27078e95cfb3bb", "start": 2446 } ] }
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ -0.004431573208421469, -0.04506322368979454, -0.06394889950752258, -0.0008986139437183738, -0.01659742370247841, -0.02933533489704132, -0.006014277692884207, 0.022104471921920776, -0.02457578107714653, 0.050555020570755005, -0.02866411581635475, -0.004820575006306171, 0.011044609360396862, ...
7bb4ff2e95e82e5265c7a6787a3ee6439ff6baea
subsection
4
16
RESULTS
REF (a) and  REF (a).] Residue Asp118 of the F/G helix-linker from cCaM shows very different behavior relative to the rest of the residues in Fig. REF . Residue Asp118 shows highest \mathcal {B}_i near the transition state at \alpha _0 = 0.4 whereas \mathcal {B}_i of all the other residues shown decrease monotonically ...
{ "cite_spans": [] }
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ -0.00010008292883867398, -0.025132915005087852, -0.056430794298648834, -0.00915588904172182, -0.00531423045322299, 0.0072598569095134735, -0.016053324565291405, 0.04727490618824959, -0.01461127307265997, 0.031526777893304825, -0.009255077689886093, 0.00972813181579113, 0.02990923821926117, ...
30758a4500f8af5d5b9280634505fd6a798589e6
subsection
5
16
RESULTS
The engineered “even-odd" EF-hands paired CaM2/3 fragment (composed of EF-hands 2 and 3) has been shown recently to have distinct transition characteristics from the “odd-even" EF-hands paired nCaM and cCaM.  NMR spectroscopy has shown that Ca^{2+}-free (apo) CaM2/3 does not have a stable folded structure but rather sh...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2228, "openalex_id": "", "raw": "T. M. Lakowski, G. M. Lee, M. Okon, R. E. Reid, and L. P. McIntosh, Protein Sci. 16, 1119 (2007a).", "source_ref_id": "194e7dffd05398c55589fbbb9db18a1bae094f1f", "start": 2045 } ]...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ -0.0061366502195596695, -0.025995902717113495, -0.06645431369543076, -0.009557765908539295, 0.01565246284008026, -0.04793376103043556, 0.017467904835939407, 0.05449375882744789, -0.044607993215322495, 0.05748390033841133, -0.024180462583899498, 0.013364091515541077, 0.0011499067768454552, ...
6971833dd5cf714f3dfe66237e5b9ba2b3ea017e
subsection
6
16
RESULTS
The local unfolding of the domain linker enhances the flexibility of this linker region dramatically, first relaxing in structure and then stabilized in the holo-CaM2/3 structure as a rigid \alpha -helix conformation. This local unfolding signaled by increase and decrease in flexibility is similar to the cracking exhib...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2341, "openalex_id": "", "raw": "S. Tripathi and J. J. Portman, J. Chem. Phys. 128, 205104 (2008).", "source_ref_id": "f6d469938f1ee35b24ef4439565aba353076db19", "start": 2077 }, { "arxiv_id": "", "...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ -0.006299762986600399, -0.009203529916703701, -0.04478135332465172, -0.00872274860739708, -0.024466432631015778, -0.044903457164764404, 0.021276485174894333, 0.035562559962272644, -0.0038786849472671747, 0.0287553071975708, 0.009012743830680847, 0.01825443096458912, 0.0007087709964253008, ...
81a27500a786df2835c2c18c34a16ce9993a1162
subsection
7
16
DISCUSSION
CaM, a small (148-residue) Ca^{2+}-binding protein with very high plasticity, may be an ideal system to demonstrate flexibility influenced conformational transitions. The protein consists of structurally similar N- and C-terminal globular domains connected by a flexible tether also known as central or interdomain linke...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 766, "openalex_id": "", "raw": "W. E. Meador, A. R. Means, and F. A. Quiocho, Science 262, 1718 (1993).", "source_ref_id": "593b727a7644f5635449fe188e29a796a4d7453e", "start": 503 }, { "arxiv_id": "", ...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ 0.007640032563358545, 0.0030361786484718323, -0.06081511825323105, 0.012434600852429867, -0.015959009528160095, -0.03619002923369408, 0.007407360710203648, 0.05254572629928589, -0.0321316197514534, 0.06121180206537247, -0.023740170523524284, -0.004756425507366657, -0.0006450926302932203, 0...
95722b29d3649f603f801dddea71a101af01fe00
subsection
8
16
DISCUSSION
The mechanism controlling the open/closed transition does not involve cracking for the relatively flexible nCaM whereas the mechanism controlling the conformation transition of the more rigid cCaM exhibits transient partial local unfolding in its helix-linker between the binding loops. This partial local unfolding or c...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1500, "openalex_id": "", "raw": "Y. S. Babu, S. Sack, T. J. Greenhough, C. E. Bugg, A. R. Means, and W. J. Cook, Nature 315, 37 (1985).", "source_ref_id": "290e4a934f66f31f04269f951a2c5572ae2b6b06", "start": 1033 }...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ -0.004825922194868326, -0.025422880426049232, -0.05835359916090965, -0.0029012756422162056, -0.012162086553871632, -0.043368443846702576, 0.0013199754757806659, 0.03283916041254997, -0.02060077339410782, 0.04382623732089996, -0.02511768415570259, 0.02765081636607647, -0.0010309923673048615, ...
9c12065e3e78395393128641d9f64a01d3dc7e00
subsection
9
16
DISCUSSION
On the other hand, in Ca^{2+}-bound (holo) CaM structure  this same central linker adopts a more stable \alpha -helix conformation which requires cracking in the conformational transition from its apo-CaM structure.
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 215, "openalex_id": "", "raw": "G. Barbato, M. Ikura, L. E. Kay, R. W. Pastor, and A. Bax, Biochemistry 31, 5269 (1992).", "source_ref_id": "ab0c097496d238db76aef72e24b9902e69a3dd5a", "start": 0 }, { "arx...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ -0.0061866226606070995, -0.027019750326871872, -0.0605388842523098, 0.023205555975437164, -0.025204192847013474, -0.02549407258629799, -0.029109928756952286, 0.05580928549170494, -0.04973708838224411, -0.0015085136983543634, -0.027660533785820007, -0.033503878861665726, -0.019055712968111038...
4995ae87f1b52a7659bb8b94308b2b9339cbfc61
subsection
10
16
METHODS
Preparation of Structures.  The structures of the two conformations of the transition are rotated to have the same center of mass and minimum root-mean square deviation of the C_{\alpha } positions. In nCaM, EF-hands 1 and 2 are consist of helices A/B and C/D (Fig. REF (a)), respectively, whereas helices E/F and G/H in...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 725, "openalex_id": "", "raw": "H. Kuboniwa, N. Tjandra, S. Grzesiek, H. Ren, C. B. Klee, and A. Bax, Nat. Struct. Biol. 2, 768 (1995).", "source_ref_id": "752813c2db0c432e902bb1f229f0f116d4e42dbe", "start": 479 },...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ 0.03316803276538849, -0.03499883413314819, -0.05864669755101204, 0.019787920638918877, 0.0009530660463497043, -0.05986722931265831, 0.03286289796233177, 0.03411394730210304, -0.03408343344926834, 0.053795069456100464, -0.02265617623925209, 0.017804551869630814, 0.013944610022008419, 0.0223...
6fdbfb8c088016ce6c4bac6e346e2a26daa9a0a7
subsection
11
16
METHODS
The probability for a particular configurational ensemble specified by the variational parameters \lbrace C_i,\alpha _i\rbrace at temperature T is given by the variational free energy F(\lbrace C\rbrace ,\lbrace \alpha \rbrace ) = E(\lbrace C\rbrace ,\lbrace \alpha \rbrace ) - TS(\lbrace C\rbrace ,\lbrace \alpha \rbrac...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 886, "openalex_id": "", "raw": "J. J. Portman, S. Takada, and P. G. Wolynes, J. Chem. Phys. 114, 5069 (2001).", "source_ref_id": "4753b06b6789e98fa6fc1ad5b04e771b6bef729a", "start": 505 }, { "arxiv_id": "...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ 0.008929016999900341, -0.016667498275637627, -0.06648683547973633, 0.02661915495991707, 0.003445684676989913, -0.07106582075357437, 0.01862119697034359, 0.017858033999800682, 0.019796470180153847, 0.008310854434967041, -0.02280333638191223, -0.017064344137907028, 0.026832841336727142, 0.04...
ea69a658a7d11996027367db843b1a34dc138260
subsection
12
16
METHODS
These natural order parameters for the reference Hamiltonian \mathcal {H}_0, \mathcal {B}_i = \langle \delta \mathbf {r}_i^2\rangle _0, contains information about the degree of structural order of each residue. , Conformational Transition Mechanism. The main-chain dynamics responsible for the detailed mechanism of the ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 249, "openalex_id": "", "raw": "J. J. Portman, S. Takada, and P. G. Wolynes, Phys. Rev. Lett. 81, 5237 (1998).", "source_ref_id": "dc578e76cb12676c520347ce8b1bcf19ff2eb9aa", "start": 0 }, { "arxiv_id": ""...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ 0.0038566754665225744, -0.03475967049598694, -0.0570070818066597, 0.025146592408418655, -0.026016347110271454, -0.03921525552868843, -0.014823976904153824, 0.009956402704119682, 0.0023651225492358208, 0.030838144943118095, -0.048309534788131714, 0.009788555093109608, -0.0011720707407221198, ...
8a47c51db2e3b76656339b94ec6f21fa210cfaf6
subsection
13
16
METHODS
This difference shifts the relative degree of localization to be between \Delta \overline{\rho _i}(1) = 1 and \Delta \overline{\rho _i}(0) =-1 corresponding to the apo and holo conformations, respectively.REFERENCES
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 215, "openalex_id": "", "raw": "S. Tripathi and J. J. Portman, J. Chem. Phys. 128, 205104 (2008).", "source_ref_id": "f6d469938f1ee35b24ef4439565aba353076db19", "start": 205 }, { "arxiv_id": "", "do...
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ -0.0339672826230526, -0.025284718722105026, -0.039613235741853714, 0.019089428707957268, -0.024567529559135437, -0.003374220570549369, 0.012375321239233017, 0.055025164037942886, 0.022644855082035065, -0.01899787224829197, -0.0201575830578804, -0.022507520392537117, -0.008560487069189548, ...
af0df5de31965a13608f3613c1f5a5c556371dda
subsection
14
16
Figure
Three dimensional structures of calmodulin (CaM) domains and EF-hands 2 and 3 fragment. The apo-CaM and holo-CaM structures shown here are correspond to human CaM with PDB code 1cfd and 1cll respectively. (a) The closed, apo and open, holo conformations of N-terminal domains of CaM (nCaM) consist of helices A/B and C/D...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 750, "openalex_id": "", "raw": "W. Humphrey, A. Dalke, and K. Schulten, J. Mol. Graphics 14, 33 (1996).", "source_ref_id": "cb4f91cda9add2260756c875f7288b46f9118384", "start": 664 } ] }
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ 0.013890809379518032, -0.039391618221998215, -0.05272557586431503, -0.0018050041981041431, -0.006945404689759016, -0.03252631053328514, 0.013425493612885475, 0.0377134308218956, -0.037530358880758286, 0.0420767180621624, -0.03399090841412544, 0.00166960502974689, 0.029658136889338493, 0.01...
4f35358700e006e836f60edd4dc4c4eab9da5278
subsection
15
16
Figure
Residue Glu45 and Asp118 are from the nCaM and cCaM, respectively.(a) Fluctuations \mathcal {B}_i vs residue index of fragment EF-hands 2 and 3 of CaM (CaM2/3) for selected values of the interpolation parameter \alpha _0 in the conformational transition route between unfolded and folded states. The secondary structure ...
{ "cite_spans": [] }
10.1073/pnas.0806872106
0807.1699
Inherent flexibility determines the transition mechanisms of the EF-hands of Calmodulin
[ "Swarnendu Tripathi", "John J. Portman" ]
[ "q-bio.QM", "q-bio.BM" ]
2,008
en
Quantitative Biology
[ -0.02703317627310753, -0.05617164447903633, -0.043692447245121, -0.03978697583079338, -0.023066682741045952, -0.05153390020132065, 0.0069756885059177876, 0.06016865000128746, -0.015179464593529701, 0.04350937902927399, -0.034142352640628815, 0.018383169546723366, 0.026895875111222267, 0.01...
df439270ce55c72b049036eb38f3f78e44136c6e
abstract
0
6
Abstract
Interface dynamics in two-dimensional systems with a maximal number of conservation laws gives an accurate theoretical model for many physical processes, from the hydrodynamics of immiscible, viscous flows (zero surface-tension limit of Hele-Shaw flows, [1]), to the granular dynamics of hard spheres [2], and even diffu...
{ "cite_spans": [] }
0807.1700
Optimal approximation of harmonic growth clusters by orthogonal polynomials
[ "Ferenc Balogh", "Razvan Teodorescu" ]
[ "math-ph", "cond-mat.stat-mech", "math.MP", "nlin.SI" ]
2,008
en
Physics
[ -0.03670231252908707, 0.011059507727622986, 0.02864793874323368, 0.014827367849647999, -0.024452952668070793, -0.04936354234814644, -0.008290817029774189, -0.04191935062408447, 0.004526771139353514, 0.033163268119096756, -0.021447818726301193, 0.021905453875660896, 0.007001812569797039, 0....
446ab50bd18b1191ace3e1893ac3196618bab790
subsection
1
6
Body
Optimal approximation of harmonic growth clusters by orthogonal polynomialsFerenc Balogh^{{\sharp },{\ddagger }} Razvan Teodorescu^{\sharp } ^{\sharp }Center for Nonlinear Studies, LANL ^{\ddagger }Concordia University, MontréalInterface dynamics in two-dimensional systems with a maximal number of conservation laws giv...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 568, "openalex_id": "", "raw": "H. S. S. Hele-Shaw. Nature, 58(1489):34–36, 1898.", "source_ref_id": "326222c1a224c9a0f767e635b8a6843354e215ce", "start": 0 }, { "arxiv_id": "", "doi": "", "end...
0807.1700
Optimal approximation of harmonic growth clusters by orthogonal polynomials
[ "Ferenc Balogh", "Razvan Teodorescu" ]
[ "math-ph", "cond-mat.stat-mech", "math.MP", "nlin.SI" ]
2,008
en
Physics
[ -0.015489291399717331, 0.04150824993848801, -0.03146691620349884, 0.0014325686497613788, -0.03894450515508652, -0.04816177487373352, -0.0038685076870024204, -0.03442743048071861, 0.001491702627390623, 0.04578115791082382, -0.031619518995285034, 0.03989064693450928, -0.02595791593194008, 0....
b1177bc78ee80be7bdce0700a51431fb4ad0efa9
subsection
2
6
Body
Therefore, taking h(z)=z^k we have that the interior harmonic momentsare preserved while the area grows linearly with t.Mapping the interior problem by means of a simple coordinate change \tilde{z} = 1/z and changing the source to a sink (Q \rightarrow -Q) implies that in the original exterior problem for D_- , 0 \in D...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 453, "openalex_id": "", "raw": "A.N. Varchenko and P.I. Etingof. Why the boundary of a round drop becomes a curve of order four. American Mathematical Society, 1992.", "source_ref_id": "1d77585b55d11fda4c7439f1f1932f03473d48...
0807.1700
Optimal approximation of harmonic growth clusters by orthogonal polynomials
[ "Ferenc Balogh", "Razvan Teodorescu" ]
[ "math-ph", "cond-mat.stat-mech", "math.MP", "nlin.SI" ]
2,008
en
Physics
[ -0.013652498833835125, 0.05845405161380768, -0.049667637795209885, 0.013233008794486523, -0.0019525361713021994, -0.020516883581876755, 0.01999824121594429, -0.01839655078947544, 0.02111179754137993, 0.047989677637815475, -0.030371088534593582, 0.026694830507040024, -0.013225381262600422, ...
c0e3ac514795ac1bebdd4415e99e3a5945d229d8
subsection
3
6
Body
To that end, we define the following family of orthogonal polynomials: consider the domain specified by the exterior harmonic moments \lbrace t_k \rbrace and t_0. The function defined in a neighborhood of the origin byis preserved by the harmonic growth. Now consider the function W(z) = |z|^2 - 2 \Re V(z), which we lab...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1431, "openalex_id": "", "raw": "F Balogh, E Saff, and R Teodorescu. in preparation.", "source_ref_id": "276ce661fd0d8f4158846b3fa591c24ee1cee172", "start": 880 } ] }
0807.1700
Optimal approximation of harmonic growth clusters by orthogonal polynomials
[ "Ferenc Balogh", "Razvan Teodorescu" ]
[ "math-ph", "cond-mat.stat-mech", "math.MP", "nlin.SI" ]
2,008
en
Physics
[ -0.028119990602135658, 0.05526348575949669, -0.030881639569997787, 0.014143913052976131, -0.0012864171294495463, -0.028791330754756927, 0.061427608132362366, -0.043270912021398544, -0.003858297597616911, 0.042263902723789215, -0.012991954572498798, 0.05956616625189781, -0.022169476374983788,...
bfdddb46903ee83a1c2b8d7a705c4e0a059011d4
subsection
4
6
Body
Since f(\zeta ) is a rational function of order two, the Cauchy transform C_{D_+} (z) (REF ) in the exterior domain D_- satisfies a quadratic equationwith rational coefficients in z depending on the parameters of f(\zeta ). As an algebraic function, C_{D_+} (z) can be analytically continued on a plane with a branch cut...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 2007, "openalex_id": "", "raw": "Y. E. Hohlov and S. D. Howison. Quart. Appl. Math., 51(4):777–789, 1993.", "source_ref_id": "3feb1b831b67dbef92fcb6abacc7e3d72dc2ad58", "start": 1904 }, { "arxiv_id": "", ...
0807.1700
Optimal approximation of harmonic growth clusters by orthogonal polynomials
[ "Ferenc Balogh", "Razvan Teodorescu" ]
[ "math-ph", "cond-mat.stat-mech", "math.MP", "nlin.SI" ]
2,008
en
Physics
[ -0.05546974763274193, 0.024988846853375435, -0.03682727366685867, -0.0009916209382936358, -0.012196937575936317, 0.011037503369152546, 0.045828141272068024, -0.0167812779545784, 0.046194277703762054, 0.034081246703863144, -0.030511412769556046, 0.0257668886333704, 0.03283027932047844, 0.00...
2cd23ee911de23ca94654c26c67a6a7cba6d8495
subsection
5
6
Body
For example, such (reduced) representations arise in satellite imaging data compression . Shape reconstruction algorithms are then needed to find the boundary \Gamma , given the set of moments t_0, \lbrace t_k\rbrace , with particular emphasis on good convergence rates. Since the data t_0, \lbrace t_k\rbrace is suffici...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 89, "openalex_id": "", "raw": "M. Putinar. Numer. Math., 93(1):131–152, 2002.", "source_ref_id": "9e0ad5e93d739c7ccd88a6375735f407538eb47b", "start": 0 } ] }
0807.1700
Optimal approximation of harmonic growth clusters by orthogonal polynomials
[ "Ferenc Balogh", "Razvan Teodorescu" ]
[ "math-ph", "cond-mat.stat-mech", "math.MP", "nlin.SI" ]
2,008
en
Physics
[ -0.01115333754569292, 0.02186420187354088, -0.0274484995752573, -0.028577566146850586, -0.024290168657898903, 0.00004368692316347733, 0.05245577543973923, 0.011206738650798798, 0.02610582672059536, 0.05614812672138214, -0.034024544060230255, 0.0018929013749584556, -0.04601705074310303, 0.0...
75c14e8f6dc9d243f4d09e9d5c9f833c4056de12
abstract
0
22
Abstract
We discuss the theoretical modelling of x-ray photoelectron diffraction (XPD) with hard x-ray excitation at up to 20 keV, using the dynamical theory of electron diffraction to illustrate the characteristic aspects of diffraction patterns resulting from such localized emission sources in a multi-layer crystal. We show ...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.05031809210777283, -0.041255343705415726, -0.044642433524131775, 0.0038562456611543894, -0.011999751441180706, -0.05581066757440567, 0.0429946593940258, 0.0056565897539258, 0.014021324925124645, 0.03435911238193512, -0.026379618793725967, -0.004210974555462599, -0.029659906402230263, 0....
15b62eeb361b8efea81e8f6c63e64f9ba0717394
subsection
1
22
Introduction
The method of x-ray photoelectron diffraction (XPD) is a powerful tool for the analysis of surface atomic structure, including adsorbates and overlayer growth. By measuring the angular intensity of photoelectrons excited by x-rays and comparing the experimental data with simulations, element-specific information on the...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 374, "openalex_id": "", "raw": "C. S. Fadley, in Synchrotron Radiation Research: Advances in Surface Science, edited by R. Z. Bachrach (Plenum Press, New York, 1992), vol. 2, pp. 421–518.", "source_ref_id": "843d8b55d620063d...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.018886229023337364, -0.025720665231347084, -0.056475620716810226, -0.004881739616394043, -0.0036174452397972345, -0.03218897059559822, 0.04781053587794304, -0.013798541389405727, 0.029442990198731422, 0.002957647666335106, -0.014881676994264126, -0.011228000745177269, -0.04161682724952698...
b852e612905804475b8c11535c554d65b68ccbb2
subsection
2
22
Introduction
This poses considerable calculational difficulties as the photoelectron kinetic energies become larger than approximately 1 keV. Beyond this, the clusters sizes needed at these energies also become larger due to the greater inelastic mean free paths, which roughly go as E_{kin}^{0.75} and can be as large as 5-15 nm for...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 573, "openalex_id": "", "raw": "R. Trehan, J. Osterwalder, and C. S. Fadley, J. Electron Spectr. Rel. Phenom. 42, 187 (1987).", "source_ref_id": "b7a35a37042cc10e01ead4e7b588a6611e389c7d", "start": 336 }, { ...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ 0.004591644741594791, -0.01946491189301014, -0.06321520358324051, -0.012516426853835583, 0.010601970367133617, -0.028602438047528267, 0.018564889207482338, -0.006681529805064201, 0.02524641901254654, 0.01706993579864502, -0.0008385281544178724, 0.03057028539478779, -0.02346162684261799, 0....
df9e6d71bf182dc4ef26c05d99cac6d38d367fc1
subsection
3
22
Introduction
It was shown that this theory can not only explain the formation of Kikuchi bands but also reproduces features like forward-scattering directions and ring-shaped interference maxima around these directions. Such features can also be explained in the intuitive forward scattering picture of cluster calculations, as has b...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 393, "openalex_id": "", "raw": "A. Winkelmann, B. Schröter, and W. Richter, Phys. Rev. B 69, 245417 (2004).", "source_ref_id": "bedc9eb2f298c22b4df3508a69d5e53a7fe4c196", "start": 207 }, { "arxiv_id": "",...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.03134984150528908, -0.02979303151369095, -0.0558924600481987, 0.004151488188654184, -0.006975110620260239, -0.03418872505426407, 0.04279695823788643, -0.0018305849516764283, 0.011523432098329067, 0.04633793234825134, -0.03827916085720062, -0.01694173365831375, -0.011836320161819458, 0.0...
de0d6b858ce3bc5e030b08bbb2e152a54665d1b7
subsection
4
22
Theory
Although the full details of our long-range-order dynamical approach have been presented elsewhere, we introduce the essentials briefly here. For the description of the photoelectron diffraction process, we assume in first approximation that the electrons originate isotropically from point sources which are periodicall...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 141, "openalex_id": "", "raw": "A. Winkelmann, B. Schröter, and W. Richter, Phys. Rev. B 69, 245417 (2004).", "source_ref_id": "bedc9eb2f298c22b4df3508a69d5e53a7fe4c196", "start": 0 }, { "arxiv_id": "", ...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.01606391742825508, -0.028939461335539818, -0.060472339391708374, 0.007787873037159443, 0.0035125520080327988, -0.017742009833455086, 0.003714685793966055, -0.021067684516310692, 0.010999131016433239, 0.06129612773656845, 0.014607029035687447, 0.013798493891954422, -0.011464419774711132, ...
d91dfd32c96d6994a9ac5c0cf6e29ae8607334f4
subsection
5
22
Theory
After this, the wave function (REF ) is known and can be used to calculate the probability density inside the crystal for a plane wave moving in the \mathbf {k}^{\alpha }_{out} direction. The modulation of this probability at the photoemitter positions describes the diffraction by the crystal. To couple the photoemitte...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 601, "openalex_id": "", "raw": "W. Schattke, M. A. Van Hove, F. J. Garcia de Abajo, R. Diez Muino, and N. Mannella, Solid-State Photoemission and Related Methods: Theory and Experiment (Wiley-VCH, 2003), chap. Overview of core and...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.01285263430327177, -0.031456537544727325, -0.050678279250860214, -0.009069306775927544, 0.008268401026725769, 0.010213457979261875, 0.014012040570378304, 0.005053335335105658, 0.041311491280794144, 0.05333270877599716, -0.021860919892787933, 0.02567475661635399, -0.001029736245982349, 0...
4875b3398656d9cdc8bd9f218f573faf16cb5b6a
subsection
6
22
Theory
This leads to coefficients of the form \mu _{\mathbf {g},\mathbf {h}}= \exp (-M_{\mathbf {g}-\mathbf {h}}^n) \exp [ i (\mathbf {g}-\mathbf {h})\cdot \mathbf {r}_n ] and results in the cross section formula which we have used in our previous simulations for quasi-elastic backscattering of electrons and XPD , :I_{DYN} \p...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 772, "openalex_id": "", "raw": "A. Winkelmann, B. Schröter, and W. Richter, Phys. Rev. B 69, 245417 (2004).", "source_ref_id": "bedc9eb2f298c22b4df3508a69d5e53a7fe4c196", "start": 0 }, { "arxiv_id": "", ...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.02560076303780079, -0.0106873270124197, -0.04290187358856201, -0.014966834336519241, 0.031032152473926544, -0.021847611293196678, 0.011999404057860374, 0.0026870884466916323, -0.009665126912295818, 0.03805023804306984, -0.02167978696525097, 0.0030589706730097532, -0.029948925599455833, ...
baee21e894f90e33000559348cce826859dd43f7
subsection
7
22
Results
In this section, we will first show that the dynamical electron diffraction approach is able to reproduce published experimental data for XPD at kinetic energies near 1 keV from diamond C(111) and from silicon Si(111) with very good agreement. We then calculate the corresponding XPD patterns at kinetic energies ranging...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.04432358592748642, -0.010203277692198753, -0.04352991282939911, -0.023565983399748802, -0.02339809201657772, -0.06031915172934532, 0.03925628960132599, -0.0016856013098731637, 0.006677537690848112, 0.04502568021416664, 0.02562648057937622, -0.002875156933441758, -0.009440130554139614, 0...
90e972dd09dc24cf5533ce3705576da05f42d6dd
subsection
8
22
XPD from Diamond and Silicon near 1 keV
In Fig. REF a, we show the experimental data of , for C1s photoemission in diamond C(111) observed at a kinetic energy of 964 eV. In part b of Fig. REF , the result of an XPD simulation using dynamical electron diffraction theory for point sources in a crystal is shown. We assumed a lattice constant of 3.57Å  and isotr...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 131, "openalex_id": "", "raw": "J. Osterwalder, R. Fasel, A. Stuck, P. Aebi, and L. Schlapbach, Journal of Electron Spectroscopy and Related Phenomena 68, 1 (1994).", "source_ref_id": "32c2cd11ecb158d02af330956d538fcc319469e...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.01565614528954029, -0.027665292844176292, -0.050478097051382065, 0.006000759080052376, 0.0010052130091935396, -0.0544760599732399, 0.025055935606360435, 0.006637839134782553, -0.009277715347707272, 0.047395698726177216, -0.012215149588882923, 0.0051996405236423016, -0.017914535477757454, ...
cf5c203b4bc9acba9a81a3efe82c302d35f94dfd
subsection
9
22
XPD from Diamond and Silicon near 1 keV
REF . We will demonstrate below that a rather complicated fine structure of dark lines exists at high kinetic energies and that this is very sensitive to the crystal geometry. From this fine structure, valuable information should be obtainable in a way which is qualitatively different from the low energy regime.Summari...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ 0.007575986906886101, 0.002864836947992444, -0.029312126338481903, -0.004699706099927425, -0.0165710411965847, -0.0373840257525444, 0.027420036494731903, 0.039855945855379105, -0.014694210141897202, 0.028503410518169403, -0.021163934841752052, 0.0033779137302190065, -0.030227653682231903, ...
9976c67dadb84bb0873d81a966ddc0ab2c1f884a
subsection
10
22
Energy dependent full-hemispherical patterns
Having convinced ourselves that our calculational approach is able to describe the XPD patterns of diamond and silicon at around 1 keV kinetic energy, we will now show the results of calculations at systematically higher energies up to 20 keV. In Figures REF and REF we show calculations for the same two cases C(111) an...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.02330007404088974, 0.0005202271859161556, -0.06988496333360672, -0.021575838327407837, -0.019973671063780785, -0.06530734151601791, 0.07019013911485672, 0.019256511703133583, 0.009788472205400467, 0.0279692430049181, 0.012275644578039646, -0.003484711516648531, -0.013587894849479198, 0....
fd8879643b36faffa7a38827e236d8d71b92336a
subsection
11
22
Simple interpretation of the photoelectron diffraction process at high energies
We see from the simulation that the photoelectron diffraction patterns become dominantly characterized by a network of Kikuchi bands as energy is increased. These have the general property of being symmetric with respect to a projected lattice plane and they appear either with increased intensity in the middle of the b...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.006296675652265549, -0.036613013595342636, -0.04884786531329155, -0.006468299310654402, 0.0068878233432769775, -0.040670957416296005, 0.032433029264211655, -0.0007718290435150266, 0.013958712108433247, 0.045156050473451614, -0.04945807904005051, -0.0002495691878721118, -0.0188557021319866...
f86b39dc08275357c4224a6dc3b2ccac3f782acf
subsection
12
22
Simple interpretation of the photoelectron diffraction process at high energies
At the position of the dark Kikuchi line, marked by the red solid square (a), we see that the probability density is concentrated between the photoemitters, so that it is more unlikely for photoelectrons to be diffracted in the direction of the red square, which is then manifested by the lower photoelectron intensity. ...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.02576068602502346, -0.05661856755614281, -0.04715670645236969, -0.03598560020327568, -0.009973108768463135, -0.028599243611097336, 0.03449001535773277, 0.014894803985953331, 0.03287234529852867, 0.04163219779729843, -0.04315830394625664, 0.012140180915594101, -0.00033669735421426594, 0....
664a8e2b22f6c2b96edd0fde94c798ce35c2bc5b
subsection
13
22
Experimental implications and possible applications
Based on the simulations above, we consider some implications for future HXPD experiments. First of all, this concerns the angular width of the features to be observed and the necessary angular resolution.
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.028164448216557503, -0.009062666445970535, -0.027828793972730637, 0.000599791354034096, -0.045710012316703796, 0.005278926808387041, 0.0067054578103125095, -0.01975783333182335, 0.02769147977232933, -0.011290190741419792, -0.011992013081908226, -0.022122669965028763, -0.005759522784501314...
d9af98d5b64d4bef42a1f2d98723b593d0d0613d
subsection
14
22
Angular resolution
In figure REF , we compare two simulated HXPD patterns of C(111) which are blurred according to an angular resolution of \pm 1 degree (comparable to resolutions used in existing XPD experiments). One immediately notices the strongly reduced angular range over which the variations occur at 10 keV photoelectron energy. T...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.019022881984710693, -0.02262304164469242, -0.056839823722839355, -0.03052509017288685, -0.02605539932847023, -0.06858611106872559, 0.04372059181332588, 0.01870252937078476, 0.03426254540681839, 0.021494178101420403, -0.028984343633055687, -0.03121156059205532, -0.019495785236358643, 0.0...
5f8991ef23d4b3252ec8659aaf11dc2787ec5b1c
subsection
15
22
Sensitivity to lattice distortions: tetragonal example
We have demonstrated above that the high energy XPD patterns are dominated by the crystallographic symmetries. The angular scales on which relevant changes are visible are considerably reduced. This also means that it might not be necessaryily useful in all cases to measure large angular ranges at these high energies. ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 576, "openalex_id": "", "raw": "B. Krömker, M. Escher, D. Funnemann, D. Hartung, H. Engelhard, and J. Kirschner, Review of Scientific Instruments 79, 053702 (2008).", "source_ref_id": "3e360839b6650077376c774672256b9f922963c...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.006296855863183737, -0.002696473151445389, -0.044699668884277344, 0.013592970557510853, -0.0033257773611694574, -0.03456977754831314, 0.01305901538580656, -0.015942372381687164, 0.021663319319486618, 0.03389851748943329, -0.0008347815601155162, -0.019771592691540718, 0.006857508793473244,...
fa5cfe5d6c77a34d4e1cea77440173abc832e02a
subsection
16
22
Impurity or Dopant Site Determination
Another possible application of high energy XPD concerns the determination of the crystallographic position of impurities in an otherwise perfect crystal. A similar problem appears in the context of fluorescence radiation from impurities under excitation of crystals by either x-rays or electrons while changing the inci...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 334, "openalex_id": "", "raw": "B. W. Batterman, Phys. Rev. Lett. 22, 703 (1969).", "source_ref_id": "2ddd803c100fb14bd706637ab5f3608f24122890", "start": 155 }, { "arxiv_id": "", "doi": "", "e...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ 0.008616053499281406, -0.04814000427722931, -0.029580002650618553, 0.025901582092046738, -0.000714983616489917, -0.018453160300850868, 0.023535791784524918, -0.016468949615955353, 0.0355326347053051, 0.04408000409603119, -0.015461580827832222, -0.016881054267287254, 0.0034437503200024366, ...
29c83af0568b95041d0b3525310365a378202371
subsection
17
22
Effects beyond the inelastic mean free path picture
Compared to the elastic interference effects that lead to changing Kikuchi band profiles of impurities occupying different positions in the unit cell, the qualitatively different contrast reversal effect of Kikuchi bands described below could allow measurements of localized absorption effects. In photoelectron spectros...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ 0.006250828504562378, -0.012722857296466827, -0.07346916198730469, -0.0012232783483341336, 0.005038037896156311, -0.027535680681467056, 0.026284752413630486, -0.0008109105401672423, 0.03365302458405495, 0.040365323424339294, -0.02620847523212433, 0.017284169793128967, -0.0034095426090061665,...
07775a97d2c787737cb2091a498dee9c8842eb91
subsection
18
22
Effects beyond the inelastic mean free path picture
We illustrate this effect by calculations for Si(111) at 6 keV in Figure REF , placing the emitters in starting depths of 5nm, 10nm, and 30nm. The Figure REF clearly shows how the contrast is reversing with increasing thickness. A similar effect is known in transmission electron microscopy and is termed "anomalous abso...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 586, "openalex_id": "", "raw": "D. M. Bird and Q. A. King, Acta Cryst. A 46, 202 (1990).", "source_ref_id": "83c064e8a70248bd2d46ba81db094ffe7fd3370c", "start": 330 }, { "arxiv_id": "", "doi": "", ...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.019779587164521217, -0.016360891982913017, -0.017719212919473648, -0.017490282654762268, 0.009462456218898296, -0.011560984887182713, 0.010912349447607994, 0.010408702306449413, 0.026098065078258514, 0.04190952330827713, -0.013758717104792595, 0.04523664712905884, -0.04645760729908943, ...
d8eb93a9869067bb2e0e2650e952bf4c08a87b29
subsection
19
22
Spin-dependent effects and magnetic dichroism
In complete analogy to the lower energy case, in HXPD it should also be possible to observe diffraction effects that depend on the photoelectron spin and magnetic dichroism. Although the difference in purely exchange scattering of spin-up and spin-down electrons is expected to decrease as energy is increased , the spin...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 174, "openalex_id": "", "raw": "M. A. Van Hove, A. P. Kaduwela, H. Xiao, W. Schattke, and C. S. Fadley, Journal of Electron Spectroscopy and Related Phenomena 80, 137 (1996).", "source_ref_id": "e5e3790b290a1d664c19971dca0f8...
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.022445261478424072, -0.022735172882676125, -0.05508320406079292, -0.02209431491792202, -0.02098044566810131, -0.021621301770210266, -0.013869981281459332, 0.022948792204260826, 0.023818526417016983, 0.01554078795015812, -0.027709444984793663, -0.0392143577337265, -0.031890276819467545, ...
d11e5554fbd14bed3aed4091204f22397715a3c6
subsection
20
22
Comparison to Cluster Model Calculations
In Fig. REF , we now show calculations for s-wave emission from C(111) based on a cluster model whose methodology is described in detail elsewhere . These calculations were carried out in single scattering (SS) and for emission from emitters in a cluster containing about 13,000 atoms and extending to about 30 Å  below ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 148, "openalex_id": "", "raw": "F. J. Garcia de Abajo, M. A. Van Hove, and C. S. Fadley, Phys. Rev. B 63, 075404 (2001).", "source_ref_id": "3c34a00f07d04d20d664690cc0d5e73d9a4686d1", "start": 0 } ] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.02992657758295536, -0.00005591680383076891, -0.07129880785942078, 0.014871723018586636, 0.00407846923917532, -0.028125794604420662, 0.02675231546163559, -0.001546117477118969, 0.0061043500900268555, 0.03293297067284584, -0.00940069928765297, 0.01115570031106472, -0.01382635347545147, 0....
1b2f6a13733a9580bc05c50d6f6951a9b9a3bdd2
subsection
21
22
Summary
We have presented a long-range order dynamical scattering approach for simulating photoelectron diffraction patterns at high kinetic energies. The approach is based on exploiting the quasi three-dimensional translational symmetry of the scattering potential that the photoelectron experiences at high energies. The predi...
{ "cite_spans": [] }
10.1088/1367-2630/10/11/113002
0807.1701
High energy photoelectron diffraction: model calculations and future possibilities
[ "Aimo Winkelmann", "Charles S. Fadley", "F. Javier Garcia de Abajo" ]
[ "cond-mat.mtrl-sci" ]
2,008
en
Physics
[ -0.03304694965481758, -0.04574088379740715, -0.04668682441115379, -0.0060113100335001945, -0.017271073535084724, -0.0624626986682415, 0.04433722421526909, -0.022580554708838463, 0.013571218587458134, 0.01782033033668995, -0.03887517377734184, 0.013891618698835373, -0.006861895322799683, 0....
bd1e064b42e3b70e1265cbd0fde1cde124733896
abstract
0
31
Abstract
A joint spectral analysis of some Chandra ACIS X-ray data and Molonglo Observatory Synthesis Telescope radio data was performed for 13 small regions along the bright northeastern rim of the supernova remnant SN 1006. These data were fitted with a synchrotron radiation model. The nonthermal electron spectrum used to com...
{ "cite_spans": [] }
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.052304673939943314, 0.006728809792548418, -0.014830846339464188, -0.019438784569501877, -0.006213849876075983, -0.05422718822956085, -0.0029963040724396706, 0.00928453728556633, 0.03149266168475151, 0.012816781178116798, -0.013648346066474915, 0.03356776013970375, -0.035886988043785095, ...
5c37cb889607aa054e53d30c3b1e607a2495b7bb
subsection
1
31
Introduction
Several observational and theoretical clues support the suggestion that Galactic cosmic rays, up to an energy of 100 TeV or more , , , are accelerated predominantly in the shocks of supernova remnants. If Galactic supernovae occur at an average rate of one event every 30 years, then an average supernova remnant must tr...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 202, "openalex_id": "", "raw": "Lagage, P.-O., & Cesarsky, C. J. 1983, , 125, 249", "source_ref_id": "a3e800044c68309bbee6772f5adc62a82bbc5db5", "start": 0 }, { "arxiv_id": "", "doi": "", "end...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.009614369831979275, 0.017061691731214523, -0.06696484982967377, 0.015550862066447735, 0.01021717581897974, -0.03598521277308464, -0.03513060137629509, 0.011766158044338226, -0.013170161284506321, -0.011514352634549141, -0.009759348817169666, 0.02060222066938877, -0.02762223780155182, 0....
6050c3651f3bcae71c2ff45df8c7d9140e60e450
subsection
2
31
Introduction
Similarly, report that for the southeastern rim of SN 1006 the ratio varies from a value of 0.91^{+0.03}_{-0.02} (i.e., r = 4.0^{+2.2}_{-0.5}) between the bright X-ray synchrotron–emitting filaments to a value of 1 (i.e., r = \infty ) along the filaments. The mean value between the filaments is 0.96 \pm 0.03 (i.e., r =...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 256, "openalex_id": "", "raw": "Cassam-Chenai, G., Hughes, J. P., Reynoso, E. M., Badenes, C., & Moffett, D. 2008, , 680, 1180", "source_ref_id": "ab953d40e75a23e3f274f5c02ba338728f6fa6bd", "start": 0 }, { ...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.0339292511343956, -0.0009363343706354499, -0.03365464136004448, -0.04460841789841652, -0.021373596042394638, -0.022868679836392403, 0.021999090909957886, 0.0007198904640972614, 0.0060299173928797245, 0.008779803290963173, 0.01841394044458866, 0.016125546768307686, -0.04662220552563667, ...
5fc0ee1b478026888ebcedb060bff805377d7e1b
subsection
3
31
Data and analysis
X-ray spectra of the filaments along the northeastern rim of SN 1006 were obtained by analyzing 68 ks of data from the 2000 July 10–11 ChandraFor more information about the Chandra X-ray Observatory refer to the Chandra Proposers' Observatory Guide, which is available at http://asc.harvard.edu/proposer/POG/index.html. ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 438, "openalex_id": "", "raw": "Long, K. S., Reynolds, S. P., Raymond, J. C., Winkler, P. F., Dyer, K. K., Petre, R. 2003, , 586, 1162", "source_ref_id": "31044c26a1fb5ea51131e29472b315f8e8b539ff", "start": 347 }, ...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.036188554018735886, -0.005465661641210318, -0.07823562622070312, 0.005507617257535458, -0.008764891885221004, -0.05943954735994339, 0.006709071341902018, 0.003846559440717101, 0.015088735148310661, 0.030696192756295204, -0.01588207669556141, -0.008612326346337795, -0.0011108680628240108, ...
d3cd6e5ed35ac1d0f00423efc96c80c885e80e46
subsection
4
31
Data and analysis
As displayed in Figure  (and as originally reported by Koyama et al. 1995), the high-energy nonthermal emission is concentrated along the rim. The second reason is that the ACIS detectors are not well calibrated at energies below about 0.7 keV. The last reason is that the absorption column density can be frozen at some...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 479, "openalex_id": "", "raw": "Schaefer, B. E. 1996, , 459, 438", "source_ref_id": "82f8ef64c543f1f675d592036e8f72a141e74c19", "start": 370 }, { "arxiv_id": "", "doi": "", "end": 479, "...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.04412589222192764, -0.0006227137055248022, -0.06170301139354706, -0.002364977030083537, -0.0006203296361491084, -0.04876429960131645, -0.0023077598307281733, 0.0035264857579022646, 0.023039452731609344, 0.03967058286070824, -0.03088202141225338, 0.02880694530904293, 0.0019568277057260275,...
d8a1e98fe8a155154d1fd5c0666f2e01464b5652
subsection
5
31
Data and analysis
Although both sets of flux densities represent local averages because the half-power beamwidth associated with the 843 MHz MOST image (44^{\prime \prime } \times 66^{\prime \prime }; see Fig. ) is comparable to the size of the regions (49^{\prime \prime } \times 49^{\prime \prime }), they are reasonable estimates of th...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 943, "openalex_id": "", "raw": "Houck, J. C., & DeNicola, L. A. 2000, in ASP Conf. Ser. 216, Astronomical Data Analysis Software and Systems IX, ed. N. Manset, C. Veillet, & D. Crabtree (San Francisco: ASP), 591", "source_re...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.032353468239307404, -0.003468078328296542, -0.037664320319890976, -0.041235413402318954, -0.023578353226184845, -0.04163220152258873, 0.03503941744565964, 0.026783179491758347, 0.06293665617704391, 0.045447468757629395, -0.06574469059705734, 0.02801932580769062, 0.009034553542733192, 0....
b46132a302c80ee012c0be074383614470c53d71
subsection
6
31
Data and analysis
Note that , , , and use a more general form for the cutoff (exp[- \left( p / p_{m} \right)^{s} ], where s = {1}{4}, {1}{2}, 1, or 2) and that performed a detailed study of the shape of the cutoff for particles experiencing diffusive shock acceleration.The synchrotron spectrum is computed by evaluating the following int...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 254, "openalex_id": "", "raw": "Ellison, D. C., Slane, P., & Gaensler, B. M. 2001, , 563, 191", "source_ref_id": "2c7f379a8369474f21aff4b40101c3fb6cd2155d", "start": 0 }, { "arxiv_id": "", "doi": ""...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.017805034294724464, 0.00121866085100919, -0.028729118406772614, -0.006346953567117453, 0.014639186672866344, -0.022839877754449844, 0.007121250964701176, 0.018857775256037712, 0.04958557337522507, 0.0371357798576355, -0.03329098969697952, 0.024319816380739212, 0.008673661388456821, 0.01...
ddf832f5c2c2ddb1d0bc94a2c1820b998b7aa970
subsection
7
31
Data and analysis
In this case, the mean value of \sin \theta in equation (REF ) is about \pi / 4,\nu _{m} = 1.26 \times 10^{17} \left( \frac{p_{m}}{10\ {\rm TeV}\ c^{-1}} \right)^{2} \left( \frac{B}{100\ \mu {\rm G}} \right)\ {\rm Hz},andh \nu _{m} = 0.522 \left( \frac{p_{m}}{10\ {\rm TeV}\ c^{-1}} \right)^{2} \left( \frac{B}{100\ \mu ...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1583, "openalex_id": "", "raw": "Schaefer, B. E. 1996, , 459, 438", "source_ref_id": "82f8ef64c543f1f675d592036e8f72a141e74c19", "start": 1490 }, { "arxiv_id": "", "doi": "", "end": 1583, ...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.0529896579682827, -0.005536289885640144, -0.043588265776634216, -0.01111073512583971, 0.006780142895877361, -0.01749025098979473, 0.005311175249516964, 0.020557912066578865, 0.04523656517267227, 0.034827880561351776, -0.017246058210730553, 0.01576564460992813, 0.021244700998067856, 0.00...
1d0f194f268045aec8e9c9f834b3ef35b4dfa393
subsection
8
31
Data and analysis
The best-fit model for region 6, the region with the largest number of counts, is plotted in Figures  and .
{ "cite_spans": [] }
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ 0.008497204631567001, 0.02808501571416855, -0.03136490657925606, 0.0016628282610327005, -0.049671273678541183, -0.012127967551350594, -0.016399452462792397, -0.024972934275865555, -0.009908320382237434, 0.014339986257255077, -0.005896175280213356, 0.032402265816926956, -0.0011422409443184733...
07091a2961cae955e92dee80bd5275b58c5c8bc5
subsection
9
31
Discussion
It is not immediately obvious whether the cospatial or peak radio fluxes yield results that are more accurate, because the X-ray and radio synchrotron morphologies are not the same. For example, along 49^{\prime \prime }-wide strips that pass through the 13 X-ray regions toward the center of the remnant, one finds that...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 3153, "openalex_id": "", "raw": "Moffett, D. A., Goss, W. M., & Reynolds, S. P. 1993, , 106, 1566", "source_ref_id": "5cdc24e745eaafcaf4d10d34d0833a5d0ecb38d4", "start": 2985 } ] }
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.011586354114115238, -0.012791518121957779, -0.06718407571315765, 0.0035125189460814, 0.006079212762415409, -0.016704486683011055, -0.03923647478222847, 0.017513014376163483, 0.027871321886777878, -0.00731107359752059, -0.018611392006278038, 0.018489349633455276, -0.042623139917850494, -...
64548ad5e870ce826eb3f9aad1a63681aa4d1ddb
subsection
10
31
Curvature
While the values of \chi ^{2} per degree of freedom (dof) are acceptable for each of the four sets of fits, a comparison of Tables  and (and of Tables  and ) reveals that the values are uniformly lower when curvature is included as a free parameter. For example, Figure  shows the 1, 2, and 3 \sigma confidence contours...
{ "cite_spans": [] }
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.0331340953707695, -0.00607153307646513, -0.04524664953351021, -0.031181441619992256, 0.007036418654024601, -0.0029308877419680357, 0.017497608438134193, 0.00201939488761127, 0.04295838624238968, 0.011754061095416546, -0.0713328868150711, 0.011075208894908428, 0.02079271338880062, -0.009...
8cc4387db675fa2ef9cfb1cd968424d015d5e8a1
subsection
11
31
Curvature
The use of a curved source model is also compelling in the sense that the values of the best-fit indices and curvature parameters are consistent with the expected values. One expectation is that the best-fit index should be consistent with the radio spectral index. That is, the best-fit model should fit the radio spect...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 1507, "openalex_id": "", "raw": "Bell, A. R. 1987, , 225, 615", "source_ref_id": "c6f79a3e6e4ddc68452f6bfb64b777e92491a726", "start": 1442 }, { "arxiv_id": "", "doi": "", "end": 1507, "o...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.038481373339891434, -0.00024079467402771115, -0.07659654319286346, -0.02659517526626587, -0.0018128739902749658, -0.045713793486356735, 0.02311628870666027, 0.0016221455298364162, 0.052885185927152634, 0.034239571541547775, -0.031233690679073334, 0.021209003403782845, -0.02612216956913471...
cfe0c4d361a16d4044bc8e3731f0145f2dc86f9e
subsection
12
31
Curvature
This index and the index obtained using the uncurved model (\Gamma = 2.031^{+0.017}_{-0.016}) are both consistent with the idea that the highest-energy electrons in SN 1006 have a spectral index of 2.0.If the effective spectral index of the X-ray synchrotron–producing electrons \Gamma _{X} = 2 (aside from the exponenti...
{ "cite_spans": [] }
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.02850763127207756, 0.015184739604592323, -0.040380723774433136, -0.026951005682349205, -0.009271085262298584, -0.03680964186787605, 0.021243374794721603, -0.00016560617950744927, 0.05390201136469841, 0.01964096538722515, -0.004025100730359554, 0.019442571327090263, -0.025775905698537827, ...
82b1a2befb0e2af581bad27731c3ddb37f03f70e
subsection
13
31
Curvature
If the uncertainty associated with the radio flux leads to an uncertainty in the amount of curvature comparable to the statistical uncertainty, then the amount of curvature is most likely 0.05 \pm 0.01.Not only is the best-fit amount of curvature consistent with equation (REF ), it is also consistent with the amount of...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 793, "openalex_id": "", "raw": "Ellison, D. C., Berezhko, E. G., & Baring, M. G. 2000, , 540, 292", "source_ref_id": "71dfb974ea4bced362e0bffed26082fb9fd0b08f", "start": 668 }, { "arxiv_id": "", "do...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.0408819317817688, 0.013980705291032791, -0.03499371185898781, -0.013690870255231857, 0.0004662142018787563, -0.03040212206542492, 0.014545120298862457, 0.0013805278576910496, 0.014506983570754528, 0.0255512073636055, -0.02521560899913311, 0.019647734239697456, -0.013530698604881763, -0....
8381840d3ef31efb0becc0528b3fc51033155a4d
subsection
14
31
Curvature
Unfortunately, these kinds of data are not available for SN 1006.Evidence of curvature in the synchrotron spectra of supernova remnants has been reported previously. analyzed the remnant-integrated radio spectra of Kepler, Tycho, and SN 1006. They find hints of curvature for Tycho and Kepler. Unfortunately, a careful s...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 243, "openalex_id": "", "raw": "Reynolds, S. P., & Ellison, D. C. 1992, , 399, L75", "source_ref_id": "2f8c2796f5efaea492f3967a665d8d7606e6c50d", "start": 65 }, { "arxiv_id": "", "doi": "", "e...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.03957843407988548, 0.01843128353357315, -0.025190437212586403, -0.017836233600974083, -0.016615619882941246, -0.05324932187795639, 0.009856464341282845, 0.008902858942747116, 0.03252938389778137, 0.006026785355061293, 0.0025518478360027075, 0.027189195156097412, -0.009879350662231445, -...
a8611f6d2c9ec69819293113549154c2d925b3d2
subsection
15
31
Cutoff Frequency and Diffusion Coefficient
In addition to providing evidence of curvature, fits to the synchrotron spectral data provide a measure of the frequency at which the synchrotron spectrum is cut off (eq. [REF ]). The results for the cutoff critical frequency are listed in Tables –. A comparison of Tables  and (and of Tables  and ) reveals that the fre...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 954, "openalex_id": "", "raw": "Bamba, A., Yamazaki, R., Ueno, M., & Koyama, K. 2003, , 589, 827", "source_ref_id": "c2c162dd6a2475bf391ac8139912478cd5653acf", "start": 603 }, { "arxiv_id": "", "doi...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.06519129127264023, -0.0022852050606161356, -0.04861878603696823, -0.008736426010727882, 0.004009600263088942, -0.03357229381799698, -0.002388210967183113, 0.012314927764236927, 0.03674640133976936, 0.060369089245796204, -0.02171516977250576, 0.0043720281682908535, -0.014481866732239723, ...
9d8533ac0a7e220f404293672d914822732e7f24
subsection
16
31
Cutoff Frequency and Diffusion Coefficient
For these reasons, we believe that the cut-off frequencies reported here are relatively accurate.The frequencies listed in Tables  and are plotted in Figure  as a function of the position angles of the regions. This angle is measured relative to the location of the center of the remnant (Fig. ) and is expressed in degr...
{ "cite_spans": [ { "arxiv_id": "", "doi": "", "end": 714, "openalex_id": "", "raw": "Rothenflug, R., Ballet, J., Dubner, G., Giacani, E., Decourchelle, A., & Ferrando, P. 2004, , 425, 121", "source_ref_id": "9a2da5bf38a6cccda543793719a7d08dab8e785f", "start": 454 }, ...
10.1086/589628
0807.1702
Evidence of a Curved Synchrotron Spectrum in the Supernova Remnant SN 1006
[ "G. E. Allen", "J. C. Houck", "S. J. Sturner" ]
[ "astro-ph" ]
2,008
en
Physics
[ -0.04500472545623779, -0.024134738370776176, -0.051808830350637436, -0.019069798290729523, -0.0042525650933384895, -0.0059535913169384, 0.003762471256777644, 0.04976454749703407, -0.005980289075523615, 0.031106656417250633, -0.033867962658405304, 0.03661401569843292, 0.00020428522839210927, ...