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1601.07906 | c | in figure [ fig : lm_corr_all ] we showed that the scaled flux correlations between most of the pah bands had a variety of shapes , ranging from linear to bifurcated . the bifurcated correlations belong exclusively to ngc 7023 , and this is likely due to its unique geometry with respect to our line of sight , produci... | we present a sample of resolved galactic h ii regions and photodissociation regions ( pdrs ) observed with the _ spitzer _ infrared spectrograph ( irs ) in spectral mapping mode between the wavelengths of 515 . for each object we have spectral maps at a spatial resolution of in which we have measured all of the mid ... | we present a sample of resolved galactic h ii regions and photodissociation regions ( pdrs ) observed with the _ spitzer _ infrared spectrograph ( irs ) in spectral mapping mode between the wavelengths of 515 . for each object we have spectral maps at a spatial resolution of in which we have measured all of the mid ... |
1401.7675 | i | presently we possess a wealth of observations regarding the high redshift universe , thanks to present day technology . the galaxies are regularly being detected till redshift @xmath2 using lyman break technique ( steidel et al . , 2003 ) . the uv luminosity functions of lyman break galaxy ( lbg ) are well constrained ... | we present a semi - analytical model of high redshift galaxy formation . in our model the star formation inside a galaxy is regulated by the feedback from supernova ( sne ) driven outflows . we derive a closed analytical form for star formation rate in a single galaxy taking account of the sne feedback in a self - cons... | we present a semi - analytical model of high redshift galaxy formation . in our model the star formation inside a galaxy is regulated by the feedback from supernova ( sne ) driven outflows . we derive a closed analytical form for star formation rate in a single galaxy taking account of the sne feedback in a self - cons... |
astro-ph0004116 | c | in this study we have investigated several aspects of the globular clusters in the inner region of ngc 4472 : color - magnitude diagram , luminosity function , color distribution , and spatial structure of the globular cluster system . @xmath0 data enable us to study the globular clusters located close to the nucleus o... | the luminosity function of the globular clusters shows little systematic variation depending on the galactocentric radius at arcmin . these colors are exactly the same as those for the globular clusters in m87 . there are more rgcs than the bgcs within arcmin , while there are fewer rgcs than the bgcs in the outer regi... | we present a study of globular clusters in the inner region of the giant elliptical galaxy ngc 4472 , based on the wfpc2 archive data . we have found about 1560 globular cluster candidates at the galactocentric radius arcmin , most of which are located within arcmin . diagram of these objects shows a dominant vertical... |
astro-ph0004116 | i | we have presented @xmath77 photometry of the globular cluster candidates in the inner ( @xmath1 arcmin ) region of ngc 4472 , derived from the @xmath0 wfpc2 archive data for the four fields of ngc 4472 . we have found about 1560 globular cluster candidates from the colors and image classifiers . primary results and con... | we have found about 1560 globular cluster candidates at the galactocentric radius arcmin , most of which are located within arcmin . diagram of these objects shows a dominant vertical structure which consists obviously of two components : blue globular clusters ( bgcs ) and red globular clusters ( rgcs ) . the luminos... | we present a study of globular clusters in the inner region of the giant elliptical galaxy ngc 4472 , based on the wfpc2 archive data . we have found about 1560 globular cluster candidates at the galactocentric radius arcmin , most of which are located within arcmin . diagram of these objects shows a dominant vertical... |
0904.3568 | i | star formation takes place in gmcs pervaded by supersonic turbulence , and theoretical models of prestellar ( and protostellar ) cores must take these large - scale supersonic flows into account . here , we have developed models in an idealized , spherically - symmetric framework that nevertheless captures key aspects ... | we present a unified model for molecular core formation and evolution , based on numerical simulations of converging , supersonic flows . our model applies to star formation in gmcs dominated by large - scale turbulence , and contains four main stages : core building , core collapse , envelope infall , and late accreti... | we present a unified model for molecular core formation and evolution , based on numerical simulations of converging , supersonic flows . our model applies to star formation in gmcs dominated by large - scale turbulence , and contains four main stages : core building , core collapse , envelope infall , and late accreti... |
1104.1597 | i | in @xcite van den bergh introduced the notion of a noncommutative crepant resolution of a singularity , which is an algebra that can act as a substitute of an ordinary commutative crepant resolution . a noncommutative crepant resolution of a singularity with coordinate ring @xmath0 is a homologically homogeneous algebr... | we present an algorithm that finds all toric noncommutative crepant resolutions of a given toric 3-dimensional gorenstein singularity . the algorithm embeds the quivers of these algebras inside a real 3-dimensional torus such that the relations are homotopy relations . one can project these embedded quivers down to a 2... | we present an algorithm that finds all toric noncommutative crepant resolutions of a given toric 3-dimensional gorenstein singularity . the algorithm embeds the quivers of these algebras inside a real 3-dimensional torus such that the relations are homotopy relations . one can project these embedded quivers down to a 2... |
1601.00279 | i | describing a quantum state in phase space @xcite is a very useful approach to make a comparison between quantum mechanics and classical mechanics . it provides a valuable insight into the phenomenon of quantum - to - classical transition @xcite and a powerful tool to manifest nonclassical effects in quantum optics @xci... | we present bell - type tests of nonclassicality and non - gaussianity for single - mode fields employing a generalized quasiprobability function . our nonclassicality tests are based on the observation that two orthogonal quadratures in phase space ( position and momentum ) behave as independent realistic variables for... | we present bell - type tests of nonclassicality and non - gaussianity for single - mode fields employing a generalized quasiprobability function . our nonclassicality tests are based on the observation that two orthogonal quadratures in phase space ( position and momentum ) behave as independent realistic variables for... |
1003.4318 | i | resolved images of circumstellar disks around young stars provide the most direct tool for investigating the formation of planets . at millimeter wavelengths , the thermal dust emission is generally optically thin and measures the radial distribution of circumstellar dust @xcite . however , since circumstellar disks in... | we present carma observations of the thermal dust emission from the circumstellar disks around the young stars ry tau and dg tau at wavelengths of 1.3 mm and 2.8 mm . the angular resolution of the maps is as high as 0.15 , or 20 au at the distance of the taurus cloud , which is a factor of 2 higher than has been ac... | we present carma observations of the thermal dust emission from the circumstellar disks around the young stars ry tau and dg tau at wavelengths of 1.3 mm and 2.8 mm . the angular resolution of the maps is as high as 0.15 , or 20 au at the distance of the taurus cloud , which is a factor of 2 higher than has been ac... |
1003.4318 | c | we have presented carma observations of the dust thermal emission at the wavelengths of 1.3 mm and 2.8 mm from the circumstellar disks around the pre - main sequence stars ry tau and dg tau . the observations are characterized by unprecedented angular resolution of @xmath30.15 and 0.30 at 1.3 mm and 2.8 mm resp... | the unprecedented detail of the resulting disk images enables us to address three important questions related to the formation of planets . ( 1 ) what is the radial distribution of the circumstellar dust ? ( 2 ) does the dust emission show any indication of gaps that might signify the presence of ( proto-)planets ? ( 3... | we present carma observations of the thermal dust emission from the circumstellar disks around the young stars ry tau and dg tau at wavelengths of 1.3 mm and 2.8 mm . the angular resolution of the maps is as high as 0.15 , or 20 au at the distance of the taurus cloud , which is a factor of 2 higher than has been ac... |
1109.1312 | i | there is a well - established core population of type ia supernovae ( sne ia ) distinguished by striking spectroscopic homogeneity @xcite . the maximum light ultraviolet - optical - infrared spectra of these sne carry signatures of predominantly intermediate - mass and iron - peak elements ( often identified : oxygen... | we present convincing evidence of unburned carbon at photospheric velocities in new observations of 5 type ia supernovae ( sne ia ) obtained by the nearby supernova factory . detections are based on the presence of relatively strong absorption `` notches '' in multiple spectra of each sn , aided by automated fitting... | we present convincing evidence of unburned carbon at photospheric velocities in new observations of 5 type ia supernovae ( sne ia ) obtained by the nearby supernova factory . these sne are identified by examining 346 spectra from 124 sne obtained before d relative to maximum . detections are based on the presence of... |
astro-ph9707166 | i | until recently , radio source samples provided astronomers with the only known galaxy like objects at cosmological distances . currently , three of the four brightest known visible galaxies at redshifts @xmath13 are radio galaxies . one of the most intriguing properties of powerful radio galaxies at high - redshift is... | we present deep spectropolarimetric observations obtained with the w. m. keck telescope of the very high redshift (=3.79786.0024 ) radio galaxy c. we find that the bright , spatially extended rest - frame uv continuum emission from this galaxy , which is aligned with the radio axis , is unpolarized ( ) . | we present deep spectropolarimetric observations obtained with the w. m. keck telescope of the very high redshift (=3.79786.0024 ) radio galaxy c. we find that the bright , spatially extended rest - frame uv continuum emission from this galaxy , which is aligned with the radio axis , is unpolarized ( ) . this implies... |
astro-ph9707166 | c | the majority of radio galaxies at redshifts @xmath3 exhibit uv continuum polarization , with the position angle of the electric vector generally perpendicular to the major axis of the uv extent ( e.g. , tadhunter 1988 , di serego alighieri 1989 , jannuzi & elston 1991 , jannuzi 1995 , dey 1996 , cimatti 1996 , 1997 ) .... | . it may be possible for a galaxian outflow to contribute partially to the absorption line profiles of the low ionization species ; however , it is unlikely that the high velocity wings of the high ionization lines are dominated by a galaxian wind since the outflow mass implied by the absorption line strengths is very ... | we present deep spectropolarimetric observations obtained with the w. m. keck telescope of the very high redshift (=3.79786.0024 ) radio galaxy c. we find that the bright , spatially extended rest - frame uv continuum emission from this galaxy , which is aligned with the radio axis , is unpolarized ( ) . this implies... |
astro-ph9707166 | c | we have presented deep spectropolarimetric observations of one of the most distant known radio galaxies , c at @xmath18 . the spectrum is dominated by strong emission lines ( possibly excited by shocks and / or photoionization by the agn ) , a bright uv continuum emission and fairly strong resonance absorption lines o... | this implies that scattered agn light , which is generally the dominant contributor to the rest - frame uv emission in radio galaxies , is unlikely to be a major component of the uv flux from c. the resulting total light spectrum shows absorption lines and p - cygni like features that are similar to those detected in ... | we present deep spectropolarimetric observations obtained with the w. m. keck telescope of the very high redshift (=3.79786.0024 ) radio galaxy c. we find that the bright , spatially extended rest - frame uv continuum emission from this galaxy , which is aligned with the radio axis , is unpolarized ( ) . this implies... |
cond-mat0302581 | c | we presented an experimental report on the dynamical behavior of a granular column pushed vertically . we first investigated the case of a monodisperse assembly of steel beads and we observed at low driving velocities ( @xmath283 ) a steady behavior such that the pushing forces increase roughly logarithmically with vel... | we present experimental results on slow flow properties of a granular assembly confined in a vertical column and driven upwards at a constant velocity v. for monodisperse assemblies this study evidences at low velocities ( ) a stiffening behaviour i.e. the stress necessary to obtain a steady sate velocity increases rou... | we present experimental results on slow flow properties of a granular assembly confined in a vertical column and driven upwards at a constant velocity v. for monodisperse assemblies this study evidences at low velocities ( ) a stiffening behaviour i.e. the stress necessary to obtain a steady sate velocity increases rou... |
0710.3105 | c | we present wfpc2 lrf images of selected emission lines in a sample of 3cr radio galaxies with bright emission lines . we detect clumpy , high surface brightness emission line gas with a wide range of morphologies . we examine the properties of the emission line gas and its relationship to the radio source , and in part... | we present hst / wfpc2 linear ramp filter images of high surface brightness emission lines ( either [ oii ] , [ oiii ] , or h+[nii ] ) in 80 3cr radio sources . we confirm that the radio and optical emission line structures are consistent with weak alignment at low redshift ( ) except in the compact steep spectrum ( cs... | we present hst / wfpc2 linear ramp filter images of high surface brightness emission lines ( either [ oii ] , [ oiii ] , or h+[nii ] ) in 80 3cr radio sources . we overlay the emission line images on high resolution vla radio images ( eight of which are new reductions of archival data ) in order to examine the spatial ... |
astro-ph0002008 | i | ngc1068 is one of the nearest and probably the most intensely studied seyfert 2 galaxy . observations in all wavelength bands from radio to hard x - rays have formed a uniquely detailed picture of this object . ngc 1068 has played a key role in the development of unified scenarios for seyfert 1 and seyfert 2 galaxies (... | we detect a total of 36 emission lines and derive upper limits for 13 additional transitions . most of the observed transitions are fine structure and recombination lines originating in the narrow line region ( nlr ) and the inner part of the extended emission line region . we present detections and limits for 11 rotat... | we present iso - sws spectroscopy of ngc 1068 for the complete wavelength range 2.4 to 45 m at resolving power . selected subranges have been observed at higher sensitivity and full resolving power . we detect a total of 36 emission lines and derive upper limits for 13 additional transitions . most of the observed tran... |
astro-ph0002008 | i | iso - sws spectroscopy provides the first detailed census of the mid - infrared spectrum of the prototypical seyfert 2 galaxy ngc1068 . we have detected 36 emission lines on top of the strong agn - heated continuum . most lines originate in the nlr characterized by a density of @xmath12000@xmath10 . we have compared th... | ( 1 ) the spatial structure of the ngc1068 narrow line region is a combination of a highly ionized outflow cone and lower excitation extended emission . line asymmetries and net blueshifts remain , however , even for infrared fine structure lines suffering very little obscuration . this may be either due to an intrinsi... | we present iso - sws spectroscopy of ngc 1068 for the complete wavelength range 2.4 to 45 m at resolving power . selected subranges have been observed at higher sensitivity and full resolving power . we detect a total of 36 emission lines and derive upper limits for 13 additional transitions . most of the observed tran... |
1301.3199 | i | most stars , in particular high - mass stars ( @xmath9@xmath28@xmath3 ) , form as stellar clusters @xcite . stellar clusters form in dense and massive molecular clumps ( size @xmath10@xmath21@xmath2pc , mass @xmath10@xmath21001000@xmath2@xmath3 , density @xmath10 10@xmath11@xmath2@xmath12 ) with large velocity widths (... | these clumps , which are not associated with clusters , lie at distances between 0.7 to 2.1kpc . three of our target regions are associated with h ii regions ( cwhrs " from clump with h ii regions ) , and the other two are without h ii regions ( cwohrs ) . | we present maps of 7 young massive molecular clumps within 5 target regions in the (=10 ) line emission , using the nobeyama 45 m telescope . these clumps , which are not associated with clusters , lie at distances between 0.7 to 2.1kpc . we find clumps with radii of 0.51.7pc , masses of 4704200 , and velocity widths o... |
1301.3199 | r | figures [ map1 ] to [ map5 ] show the integrated intensity maps of the @xmath0(@xmath1=10 ) emission ( contours ) superposed on infrared color images in which we used the @xmath5 3.4 , 4.6 , and 12 @xmath15 composite color images , and @xmath5 22 @xmath15 color images . we defined the @xmath0 emission enclosed the 3@xm... | we find clumps with radii of 0.51.7pc , masses of 4704200 , and velocity widths of 1.43.3 . the clumps can be classified into two morphological types : cwhrs shape a filamentary or shell - like structure , cwohrs are spherical . the fraction of the class i candidates among all yso candidates ( class i+class ii ) is 50 ... | we present maps of 7 young massive molecular clumps within 5 target regions in the (=10 ) line emission , using the nobeyama 45 m telescope . these clumps , which are not associated with clusters , lie at distances between 0.7 to 2.1kpc . we find clumps with radii of 0.51.7pc , masses of 4704200 , and velocity widths o... |
1301.3199 | c | there are three clear signatures that distinguish cwhrs from cwohrs , ( 1 ) spatial distributions : shell - like or spherical , ( 2 ) velocity structures : absence or presence of the distinct velocity gradient , large velocity dispersion along shells , and ( 3 ) age spreads of ysos : small or large ( see table [ score ... | we conclude that effects from the h ii regions can be seen in ( 1 ) spatial distributions of the clumps : filamentary or shell - like structure running along the h ii regions , ( 2 ) velocity structures of the clumps : large velocity dispersion along shells , and ( 3 ) small age spreads of ysos . the small spread in ag... | we present maps of 7 young massive molecular clumps within 5 target regions in the (=10 ) line emission , using the nobeyama 45 m telescope . these clumps , which are not associated with clusters , lie at distances between 0.7 to 2.1kpc . we find clumps with radii of 0.51.7pc , masses of 4704200 , and velocity widths o... |
1301.3199 | c | we have mapped 7 young massive molecular clumps within 5 target regions in the @xmath0 line emission with the nobeyama 45 m radio telescope . our aim of this study is to understand the dynamical impact of h ii regions on the clumps . we found different signatures of the clumps with h ii region as compared to clumps or ... | we present maps of 7 young massive molecular clumps within 5 target regions in the (=10 ) line emission , using the nobeyama 45 m telescope . all of the clumps are massive and approximately in virial equilibrium , suggesting they will potentially form clusters . the two cwohrs have systematic velocity gradients . using... | we present maps of 7 young massive molecular clumps within 5 target regions in the (=10 ) line emission , using the nobeyama 45 m telescope . these clumps , which are not associated with clusters , lie at distances between 0.7 to 2.1kpc . we find clumps with radii of 0.51.7pc , masses of 4704200 , and velocity widths o... |
1205.6381 | i | following the discovery in 1961 of @xmath19 meson in @xmath20 reactions @xcite , the measurements of forward - backward asymmetry in @xmath21 suggested the existence of a rho - like resonance in the @xmath1-wave , later referred to as @xmath22 scalar meson @xcite . it was expected that @xmath22 would show up prominen... | we show that the apparent dependence of width on helicity in amplitudes and results from the interference of transversity amplitudes with definite dipion helicities and not from violation of rotational / lorentz symmetry . this suggests that the production mechanism and the mechanism responsible for mixing have indepen... | we present model independent high resolution amplitude analyses of cern data on at 17.2 gev / c for dipion masses 580 - 1080 mev at small momentum transfers on polarized target ( analysis i ) and unpolarized target ( analysis ii ) . the results for- and-wave transversity amplitudes from the analysis i are used in a mod... |
1005.3048 | i | infrared dark clouds ( irdcs ) are cold ( @xmath1625 k ) , massive ( @xmath0@xmath17 @xmath18 ) , and dense ( @xmath19@xmath20 @xmath6 ) molecular clouds with high column densities ( @xmath0@xmath21@xmath22 @xmath8 ) seen as a dark silhouette against the bright mid infrared background emission ( perault et al . 1996 ... | we present molecular line observations , made with angular resolutions of , toward the filamentary infrared dark cloud g34.43 + 0.24 using the apex [ , , and transitions ] , nobeyama 45 m [ , , , , and transitions ] , and sest [ and transitions ] telescopes . the cores have local thermodynamic equilibrium masses ... | we present molecular line observations , made with angular resolutions of , toward the filamentary infrared dark cloud g34.43 + 0.24 using the apex [ , , and transitions ] , nobeyama 45 m [ , , , , and transitions ] , and sest [ and transitions ] telescopes . we find that the spatial distribution of the molecular... |
1005.3048 | r | figure [ fig-13co32-spectra ] shows the spectra observed with apex along the whole filamentary structure detected in the 1.2 mm dust continuum observations of garay et al . ( 2004 ; see their figure 4 ) . emission in the line was detected across the whole mapped region . figure [ fig - ambientcentral ] shows contou... | the profile observed toward the most massive core reveals a blue profile indicating that the core is undergoing large we also detect the presence of high velocity gas toward each of the other three cores , giving support to the hypothesis that the excess 4.5 m emission ( `` green fuzzies '' ) detected toward these co... | we present molecular line observations , made with angular resolutions of , toward the filamentary infrared dark cloud g34.43 + 0.24 using the apex [ , , and transitions ] , nobeyama 45 m [ , , , , and transitions ] , and sest [ and transitions ] telescopes . we find that the spatial distribution of the molecular... |
1005.3048 | c | we carried out a multi line study of cores within the filamentary irdc g34.43 + 0.24 . the emission from the filament was fully mapped in the and lines . in addition , emission from the central region of the filament was observed in eight different molecular transitions [ , , , , , , and ] , and from the north regi... | we find that the spatial distribution of the molecular emission is similar to that of the dust continuum emission observed with 11 resolution ( rathborne et al . 2005 ) showing a filamentary structure and four cores . scale inward motion with an average infall velocity of 1.3 and a mass infall rate of yr . we repor... | we present molecular line observations , made with angular resolutions of , toward the filamentary infrared dark cloud g34.43 + 0.24 using the apex [ , , and transitions ] , nobeyama 45 m [ , , , , and transitions ] , and sest [ and transitions ] telescopes . we find that the spatial distribution of the molecular... |
astro-ph0305154 | i | mass outflow in the form of uv and x - ray absorbers has been shown to be a common phenomenon in the active nuclei of seyfert galaxies ( reynolds 1997 ; george et al . 1998 ; crenshaw et al . 1999 ) . with the advent of the space telescope imaging spectrograph ( stis ) on the _ hubble space telescope _ ( _ hst _ ) , th... | we present new uv spectra of the nucleus of the seyfert 1 galaxy ngc 5548 , which we obtained with the space telescope imaging spectrograph at high spectral resolution , in conjunction with simultaneous _ chandra x - ray observatory _ spectra . we find nonunity covering factors in the cores of several kinematic compon... | we present new uv spectra of the nucleus of the seyfert 1 galaxy ngc 5548 , which we obtained with the space telescope imaging spectrograph at high spectral resolution , in conjunction with simultaneous _ chandra x - ray observatory _ spectra . taking advantage of the low uv continuum and broad emission - line fluxes ... |
astro-ph0305154 | i | new _ hst _ stis echelle spectra , combined with simultaneous _ cxo _ observations , place tighter constraints on the uv absorbers of ngc 5548 than were possible in the past . simultaneous detection and measurement of the c iv and n v absorption lines in component 1 show that this component is _ not _ an x - ray war... | taking advantage of the low uv continuum and broad emission - line fluxes , we have determined that the deepest uv absorption component covers at least a portion of the inner , high - ionization narrow - line region ( nlr ) . we find that models of the absorbers based on solar abundances severely overpredict the o vi ... | we present new uv spectra of the nucleus of the seyfert 1 galaxy ngc 5548 , which we obtained with the space telescope imaging spectrograph at high spectral resolution , in conjunction with simultaneous _ chandra x - ray observatory _ spectra . taking advantage of the low uv continuum and broad emission - line fluxes ... |
astro-ph0603239 | c | we have presented 69 hst nicmos images of the near - infrared counterparts of radio sources of the 3cr catalogue at low redshift . these nicmos images allow us to charaterize the host galaxies and their environment . we also detect special features such as jets , dust disks , nuclei , and hot spots . this database of h... | we present newly acquired images of the near - infrared counterpart of 3cr radio sources . . however , each of them has unique characteristics such as close companions , dust lanes , unresolved nuclei , arc - like features , globular clusters and jets clearly visible from the images or with basic galaxy subtraction . | we present newly acquired images of the near - infrared counterpart of 3cr radio sources . all the sources were selected to have a redshift of less than 0.3 to allow us to obtain the highest spatial resolution . the observations were carried out as a snapshot program using the near - infrared camera and multiobject spe... |
astro-ph0108299 | c | we presented @xmath24 photometry of the type iin sn 1994y and the type ia sne 1993y , 1993z , 1993ae , 1994b , 1994c , 1994 m , 1994q , 1994ae , and 1995d . all observations were done using telescopes of diameter 1 m or less . light curves of sn 1993y and sn 1993z exhibit late - time rates of decline very similar... | we present optical photometry of one type iin supernova ( 1994y ) and nine type ia supernovae ( 1993y , 1993z , 1993ae , 1994b , 1994c , 1994 m , 1994q , 1994ae , and 1995d ) . sn 1993y and sn 1993z appear to be normal sn ia events with similar rates of decline , but we do not have data near maximum brightness . s... | we present optical photometry of one type iin supernova ( 1994y ) and nine type ia supernovae ( 1993y , 1993z , 1993ae , 1994b , 1994c , 1994 m , 1994q , 1994ae , and 1995d ) . sn 1993y and sn 1993z appear to be normal sn ia events with similar rates of decline , but we do not have data near maximum brightness . t... |
0805.4048 | i | molecular gas is the driving element of star formation in galaxies , and its quantitative relation to the current star formation rate is essential to our understanding of galactic evolution . it has become increasingly clear that the dynamical properties of galaxies are responsible for redistributing molecular gas on l... | we present results from a survey ofco ( _ j _ this initial paper of a series will focus on the data and the gaseous properties of the samples , and particularly on the degree of central concentration of molecular gas in a range of morphological types , from early ( s0/sa ) to late ( sd / sm ) galaxies with and withou... | we present results from a survey ofco ( _ j _ = 10 ) spectra obtained for the central regions of 68 nearby galaxies at an angular resolution of 16 using the nobeyama radio observatory 45 m telescope , aimed at characterizing the properties of star forming molecular gas . combined with similar resolution observation... |
1702.01501 | r | figure [ fig:12co integ map ] shows the @xmath0co ( @xmath22 ) velocity integrated intensity map toward the aquila rift and serpens molecular cloud complexes . for comparison , the @xmath0co ( @xmath22 ) channel maps and the longitude - velocity diagram averaged over the galactic latitude range of @xmath37 are shown in... | , we found several arcs which are spatially extended to 0.2 3 degree in length . in the longitude - velocity diagrams ofco , we also found the two spatially - extended components which appear to converge toward serpens south and w40 region . the existence of two components with different velocities and arcs suggests th... | we present results of wide - fieldco ( ) andco ( ) observations toward the aquila rift and serpens molecular cloud complexes ( 25 and ) at an angular resolution of 3.4 ( 0.25 pc ) and at a velocity resolution of 0.079 km s with the velocity coverage of km s 35 km s . we found that theco emission better traces the struc... |
1702.01501 | i | we summarize the main results of the present paper as follows . * we carried out large - scale @xmath0co ( @xmath22 ) , @xmath2co ( @xmath22 ) , and c@xmath24o ( @xmath22 ) mapping observations toward the aquila rift and serpens region of @xmath136 and @xmath4 at a effective angular resolution of 3@xmath5.4 ( @xmath137... | we present results of wide - fieldco ( ) andco ( ) observations toward the aquila rift and serpens molecular cloud complexes ( 25 and ) at an angular resolution of 3.4 ( 0.25 pc ) and at a velocity resolution of 0.079 km s with the velocity coverage of km s 35 km s . the line - width - radius relation of the identified... | we present results of wide - fieldco ( ) andco ( ) observations toward the aquila rift and serpens molecular cloud complexes ( 25 and ) at an angular resolution of 3.4 ( 0.25 pc ) and at a velocity resolution of 0.079 km s with the velocity coverage of km s 35 km s . we found that theco emission better traces the struc... |
1408.4821 | i | studying the collinear limit of scattering amplitudes is a key point for improving theoretical computations . this is a requirement to compare theoretical predictions with the highly - accurate results provided by the lhc and other experiments at colliders . in this context , understanding the singular behavior of scat... | we present splitting functions in the triple collinear limit at next - to - leading order . the computation was performed in the context of massless qcd+qed , considering only processes which include at least one photon . through the comparison of the ir divergent structure of splitting amplitudes with the expected kno... | we present splitting functions in the triple collinear limit at next - to - leading order . the computation was performed in the context of massless qcd+qed , considering only processes which include at least one photon . through the comparison of the ir divergent structure of splitting amplitudes with the expected kno... |
1010.1962 | i | observations of the circumstellar disks that accompany young stars provide important constraints on the planet formation process . their fundamental properties , like mass and size , play a significant role in the potential to form planets , and may determine the types of planets that can form . our current understandi... | we imaged 23 fields at m and 2 fields at m , covering an area of.5 arcmin and containing 67 disks . thermal dust emission above any free - free component was measured in 40 of the 42 detections , and the inferred disk masses range from . the potential for planet formation remains high in this massive star forming regio... | we present the full results of our 3-year long submillimeter array survey of protoplanetary disks in the orion nebula cluster . we imaged 23 fields at m and 2 fields at m , covering an area of.5 arcmin and containing 67 disks . we detected 42 disks with fluxes between 6 - 135 mjy and at rms noise levels between 0.6 to ... |
cond-mat0610021 | i | transport processes , such as heat flow through a conducting medium in contact with unequal heat reservoirs , are intrinsically nonequilibrium phenomena because of the presence of nonzero currents @xcite . a central problem in nonequilibrium statistical physics is to explain how such large - scale , macroscopic proces... | we present the results of a detailed study of energy correlations at steady state for a 1-d model of coupled energy and matter transport . are that short - range covariances respond quadratically to local temperature gradients , and long - range covariances decay linearly with macroscopic distance . these findings are ... | we present the results of a detailed study of energy correlations at steady state for a 1-d model of coupled energy and matter transport . our aim is to discover via theoretical arguments , conjectures , and numerical simulations how spatial covariances scale with system size , their relations to local thermodynamic ... |
astro-ph9907257 | i | we have presented the results of an intensive program of monitoring the four - image lens system b1608 + 656 with the vla . the component light curves show @xmath05% variations in flux density from which we have measured the three independent time delays in this system : @xmath107 d , @xmath90 d , and @xmath108 d. t... | we present the results of a program to monitor the four - image gravitational lens b1608 + 656 with the vla . the three independent time delays in the system are found to be d , d , and d at 95% confidence . we combine the time delays with the model to obtain a value for the hubble constant of km s mpc at 95% con... | we present the results of a program to monitor the four - image gravitational lens b1608 + 656 with the vla . the system was observed over a seven month period from 1996 october to 1997 may . the 64 epochs of observation have an average spacing of 3.6 d. the light curves of the four images of the background source sho... |
0706.0233 | i | the existence and importance of binary asteroids in small - body populations has only been realized in the last decade , after the first unambiguous detection of a satellite around main - belt asteroid 243 ida by the galileo spacecraft @xcite . it is now evident that binaries exist in the main - belt asteroids , the ne... | we present the results of an optical lightcurve survey of 114 jovian trojan asteroids conducted to determine the fraction of contact binaries . this survey led to the discovery of two trojan asteroids , ( 17365 ) and ( 29314 ) displaying large lightcurve ranges ( 1 magnitude ) and long rotation periods ( 2 rotations pe... | we present the results of an optical lightcurve survey of 114 jovian trojan asteroids conducted to determine the fraction of contact binaries . sparse - sampling was used to assess the photometric range of the asteroids and those showing the largest ranges were targeted for detailed follow - up observations . this surv... |
0706.0233 | i | sparsely sampled lightcurve measurements were used to statistically study the photometric variations of 114 jovian trojan asteroids . objects with large photometric ranges were targeted for follow - up in this survey , and are considered as candidate contact binary systems . 1 . the sparse sampling technique success... | sparse - sampling was used to assess the photometric range of the asteroids and those showing the largest ranges were targeted for detailed follow - up observations . , we find low densities of 600 kg m and 800 kg m , suggestive of porous interiors . the total binary fraction in the trojan clouds ( including both wide ... | we present the results of an optical lightcurve survey of 114 jovian trojan asteroids conducted to determine the fraction of contact binaries . sparse - sampling was used to assess the photometric range of the asteroids and those showing the largest ranges were targeted for detailed follow - up observations . this surv... |
astro-ph0512407 | i | the frequency of spectroscopic binaries ( sbs ) in star forming regions has been a topic of interest for many years . @xcite review the fraction of binary systems found among o stars in clusters / associations , the field , and runaway systems . the results from their large survey agree with previous studies ( e.g. * ?... | we present the results of time - resolved spectroscopy of 13 o - type stars in the cas ob6 stellar association . we conducted a survey for radial velocity variability in search of binary systems , which are expected to be plentiful in young ob associations . here we compare the spectra of the single stars and the indiv... | we present the results of time - resolved spectroscopy of 13 o - type stars in the cas ob6 stellar association . we conducted a survey for radial velocity variability in search of binary systems , which are expected to be plentiful in young ob associations . here we report the discovery of two new single - lined binari... |
astro-ph0512407 | i | we have monitored thirteen o stars in the cas ob6 association in search of multiple star systems . five of the thirteen were found to have radial velocity variations related to orbital motion . of these five , we have determined orbital solutions for three double - lined systems : the eclipsing binary dn cas , bd@xma... | we report the discovery of two new single - lined binaries , and we present new orbital elements for three double - lined binaries ( including one in the multiple star system hd 17505 ) . one of the double - lined systems is the eclipsing binary system dn cas , and we present a preliminary light curve analysis that y... | we present the results of time - resolved spectroscopy of 13 o - type stars in the cas ob6 stellar association . we conducted a survey for radial velocity variability in search of binary systems , which are expected to be plentiful in young ob associations . here we report the discovery of two new single - lined binari... |
0806.2846 | i | we have presented the first x - ray source catalog and their basic x - ray properties in the sxds field , based on the seven _ xmm - newton _ pointings performed between 2000 and 2003 that cover a continuous area of 1.14 deg@xmath0 in the 0.210 kev band . the catalog consists of 1245 sources in total , consisting of ... | we present the x - ray source catalog in the subaru/_xmm - newton _ deep survey . a continuous area of 1.14 deg centered at r.a . the catalog consists of 1245 sources in total including 32 extended - source candidates . the averaged log - log relations are in good agreement with previous results , bridging the flux ... | we present the x - ray source catalog in the subaru/_xmm - newton _ deep survey . a continuous area of 1.14 deg centered at r.a . = 02h18 m and dec . = 05d is mapped by seven pointings with _ xmm - newton _ covering the 0.210 kev band . from the combined images of the epic pn and mos cameras , we detect 866 , 1114... |
1404.7103 | i | we present sunyaev - zeldovich effect ( sze ) observations of galaxy clusters measured with the apex - sz experiment and use them to investigate the scaling of the sze with cluster mass . we model the thermal pressure of the intracluster medium using the @xcite universal pressure profile and use the results to calculat... | we present thermal sunyaev - zeldovich effect ( sze ) measurements for 42 galaxy clusters observed at 150 ghz with the apex - sz experiment . for each cluster , we model the pressure profile and calculate the integrated comptonization to estimate the total thermal energy of the intracluster medium ( icm ) . we measure ... | we present thermal sunyaev - zeldovich effect ( sze ) measurements for 42 galaxy clusters observed at 150 ghz with the apex - sz experiment . for each cluster , we model the pressure profile and calculate the integrated comptonization to estimate the total thermal energy of the intracluster medium ( icm ) . we compare ... |
cond-mat0407359 | i | model hamiltonians used in the study of correlation effects in solids have a coulomb interaction term in a site - centered atomic - like orbital basis set which is not explicitly defined . when the correlated electrons are well localized , as , for example , 4@xmath6-states of rare - earth ions , atomic orbitals ( or a... | we propose a computational scheme for the _ ab initio _ calculation of wannier functions ( wfs ) for correlated electronic materials . the green function can also be used for the calculation of spectral , magnetic and electronic properties of the system . here we report the results obtained with this method for srvo an... | we propose a computational scheme for the _ ab initio _ calculation of wannier functions ( wfs ) for correlated electronic materials . the full - orbital hamiltonian is projected into the wf subspace defined by the physically most relevant partially filled bands . the hamiltonian obtained in this way , with interaction... |
cond-mat0407359 | m | let us consider the general case of the electronic structure problem . for the lda hamiltonian @xmath0 we have a hilbert space of eigenfunctions ( bloch states @xmath17 ) with the basis set @xmath18 defined by particular methods ( e.g. , lmto @xcite , or linearized augmented plane waves ( lapw ) @xcite , etc . ) . in... | the full - orbital hamiltonian is projected into the wf subspace defined by the physically most relevant partially filled bands . the hamiltonian obtained in this way , with interaction parameters calculated by constrained lda for the wannier orbitals , is used as an _ ab initio _ setup of the correlation problem , whi... | we propose a computational scheme for the _ ab initio _ calculation of wannier functions ( wfs ) for correlated electronic materials . the full - orbital hamiltonian is projected into the wf subspace defined by the physically most relevant partially filled bands . the hamiltonian obtained in this way , with interaction... |
1406.2024 | c | some complex physical phenomenon such as crowded systems , and transport through porous media are not fully understood at the present time , and in order to shed new light into such phenomena a new modeling strategy has emerged in recent years which involves casting the system of interest in terms of fractional calculu... | initial conditions it is shown that the hilfer advection - diffusion pde gives the same solutions as the caputo and riemann - liouville advection - diffusion pde . to leading order , we also show that the truncation errors , arising when using the partial sum as approximate solutions , decay exponentially fast with the... | we propose a hilfer advection - diffusion equation of order and type , and find the power series solution by using variational iteration method . power series solutions are expressed in a form that is easy to implement numerically and in some particular cases , solutions are expressed in terms of mittag - leffler funct... |
0911.1996 | i | many top - down supersymmetric constructions contain extra abelian gauge interactions @xcite . since a @xmath0 often couples to both the minimal supersymmetric standard model ( mssm ) and additional hidden sectors , it is plausible that it plays a role in mediating supersymmetry breaking . one might refer to such a sce... | we propose a scenario in which the supersymmetry breaking effect mediated by an additional is comparable with that of anomaly mediation . we argue that such a scenario can be naturally realized in a large class of models . in addition , there is a relatively light , with mass in the range of several tev . discovering a... | we propose a scenario in which the supersymmetry breaking effect mediated by an additional is comparable with that of anomaly mediation . we argue that such a scenario can be naturally realized in a large class of models . combining anomaly with mediation allows us to solve the tachyonic slepton problem of the former a... |
0911.1996 | c | in this paper , we argued that combining @xmath1 mediation with anomaly mediation is both a plausible and a feasible scenario . as an example , we have considered a particular realization and argued that its contribution can be naturally comparable to anomaly mediation . such an approach solves the tachyonic slepton ma... | combining anomaly with mediation allows us to solve the tachyonic slepton problem of the former and avoid significant fine tuning in the latter . we focus on an nmssm - like scenario where gauge invariance is used to forbid a tree - level term , and present concrete models , which admit successful dynamical electroweak... | we propose a scenario in which the supersymmetry breaking effect mediated by an additional is comparable with that of anomaly mediation . we argue that such a scenario can be naturally realized in a large class of models . combining anomaly with mediation allows us to solve the tachyonic slepton problem of the former a... |
1110.4706 | i | once considered rare sources , blazars , a type of radio loud active galactic nuclei ( agn ) pointing their jets in the direction of the observer ( see e.g. * ? ? ? * ; * ? ? ? * ) , are now being detected in increasingly larger numbers . recent results from the _ wilkinson microwave anisotropy probe _ ( wmap ) , the _... | we propose a scenario where blazars are classified as flat - spectrum radio quasars ( fsrqs ) , bl lacs , low synchrotron , or high synchrotron peaked objects according to a varying mix of the doppler boosted radiation from the jet , the emission from the accretion disk , the broad line region , and the light from the ... | we propose a scenario where blazars are classified as flat - spectrum radio quasars ( fsrqs ) , bl lacs , low synchrotron , or high synchrotron peaked objects according to a varying mix of the doppler boosted radiation from the jet , the emission from the accretion disk , the broad line region , and the light from the ... |
1110.4706 | c | so far , blazars have been largely discovered in the radio , @xmath119-wave , x - ray or bands . we have shown that the wide diversity of observed in blazars results in strong differences in the observed flux at radio or x - ray frequencies ( up to three orders of magnitudes ) causing severe selection effects in surve... | objects so far classified as bl lacs on the basis of their _ observed _ weak , or undetectable , emission lines are of two physically different classes : intrinsically weak lined objects , more common in x - ray selected samples , and heavily diluted broad lined sources , more frequent in radio selected samples , which... | we propose a scenario where blazars are classified as flat - spectrum radio quasars ( fsrqs ) , bl lacs , low synchrotron , or high synchrotron peaked objects according to a varying mix of the doppler boosted radiation from the jet , the emission from the accretion disk , the broad line region , and the light from the ... |
1110.4706 | c | we have tackled the open issue of the relationship between the various blazar subclasses , and of the consequences of selection effects , through extensive monte carlo simulations . our approach is based on robust observational input , and on various results obtained by many authors over the past 20 years or so , which... | we test this new approach , which builds upon unified schemes , using extensive monte carlo simulations and show that it can provide simple answers to a number of long - standing issues including , amongst others , the different cosmological evolution of bl lacs selected in the radio and x - ray bands , the larger val... | we propose a scenario where blazars are classified as flat - spectrum radio quasars ( fsrqs ) , bl lacs , low synchrotron , or high synchrotron peaked objects according to a varying mix of the doppler boosted radiation from the jet , the emission from the accretion disk , the broad line region , and the light from the ... |
1001.0464 | i | in this paper we consider the following subclass of holant problems @xcite . an input regular graph @xmath1 is given , where every @xmath2 is labeled with a ( symmetric ) edge function @xmath3 . the function @xmath3 takes 0 - 1 inputs from its incident nodes and outputs arbitrary values in @xmath4 . the problem is to ... | we prove a complexity dichotomy theorem for holant problems on-regular graphs with an arbitrary complex - valued edge function . three new techniques are introduced : ( 1 ) higher dimensional iterations in interpolation ; ( 2 ) eigenvalue shifted pairs , which allow us to prove that a pair of combinatorial gadgets _ in... | we prove a complexity dichotomy theorem for holant problems on-regular graphs with an arbitrary complex - valued edge function . three new techniques are introduced : ( 1 ) higher dimensional iterations in interpolation ; ( 2 ) eigenvalue shifted pairs , which allow us to prove that a pair of combinatorial gadgets _ in... |
1406.2412 | i | competing electronic phases underlie a number of the most unconventional phenomena in condensed matter systems . when this competition is sufficiently strong , the usual outcome is a phase separation . one outstanding example of this situation is provided by materials showing colossal magnetoresistance , where competin... | _ s_-afm phase , cohabiting with a phase of weak and possibly proximity - induced afm order ( _ w_-afm ) whose volume fraction% is approximately constant . near optimal doping , at , we observe a phase separation between static antiferromagnetism related to the _ s_-afm phase and a paramagnetic ( pm ) phase related to ... | we report a detailed nuclear magnetic resonance ( nmr ) study by combinedna andas measurements over a broad range of doping to map the phase diagram of nafecoas . in the underdoped regime ( 0.017 ) , we find a magnetic phase with robust antiferromagnetic ( afm ) order , which we denote the _ s_-afm phase , cohabiting w... |
1110.0570 | i | the phenomenon of liquid helium ( lhe ) scintillation due to passage of charged particles was discovered in the late 1950 s @xcite . since then rather extensive studies have been conducted , motivated both by its intrinsic interest ( including an interest in illuminating the behavior of ions and neutrals in superfluid... | we report a study of the intensity and time dependence of scintillation produced by weak-particle sources in superfluid helium in the presence of an electric field ( kv / cm ) in the temperature range of 0.2 k to 1.1 k at the saturated vapor pressure . both the prompt and the delayed components of the scintillation ... | we report a study of the intensity and time dependence of scintillation produced by weak-particle sources in superfluid helium in the presence of an electric field ( kv / cm ) in the temperature range of 0.2 k to 1.1 k at the saturated vapor pressure . both the prompt and the delayed components of the scintillation ... |
1110.0570 | c | what we have observed from our data can be summarized as follows : + 1 ) the prompt scintillation yield is reduced by 15% at @xmath28 kv / cm . + 2 ) the reduction in the prompt scintillation yield is approximately linear in the strength of the electric field . + 3 ) the effect of the electric field on the prompt scin... | the reduction in the intensity of the prompt component is well approximated by a linear dependence on the electric field strength with a reduction of 15% at 45 kv / cm . the intensity of the delayed component of the scintillation has a stronger dependence on the electric field strength and on temperature . the implica... | we report a study of the intensity and time dependence of scintillation produced by weak-particle sources in superfluid helium in the presence of an electric field ( kv / cm ) in the temperature range of 0.2 k to 1.1 k at the saturated vapor pressure . both the prompt and the delayed components of the scintillation ... |
1110.0570 | c | the prompt scintillation signal from @xmath0 particles stopped in helium exhibits a 15% reduction in an electric field of 45 kv / cm . this field dependence is consistent with the current versus field measurements of gerritsen @xcite and kramers analysis of columnar recombination . we conclude using kramers theory th... | when analyzed using the kramers theory of columnar recombination , this electric field dependence leads to the conclusion that roughly 40% of the scintillation results from species formed from atoms originally promoted to excited states and 60% from excimers created by ionization and subsequent recombination with the c... | we report a study of the intensity and time dependence of scintillation produced by weak-particle sources in superfluid helium in the presence of an electric field ( kv / cm ) in the temperature range of 0.2 k to 1.1 k at the saturated vapor pressure . both the prompt and the delayed components of the scintillation ... |
1005.1612 | i | we applied eclipse mapping techniques to spectroscopy covering 4 eclipses of dq her in order to isolate the emission from different parts of its accretion flow as well as from outside the orbital plane . the main results of this study can be summarized as follows : 1 . velocity - resolved eclipse maps of the h@xmat... | the spectra were sliced into 295 narrow passbands in the continuum and in the lines , and the corresponding light curves were analysed to solve for a set of monochromatic maps of the disk brightness distribution and for the flux of an additional uneclipsed component in each band . eclipse maps of the heii line indicate... | we report an eclipse mapping study of the intermediate polar dq her based on time - resolved optical spectroscopy ( ) covering 4 eclipses . the spectra were sliced into 295 narrow passbands in the continuum and in the lines , and the corresponding light curves were analysed to solve for a set of monochromatic maps of ... |
1604.08589 | c | we have examined the spatial and spectral behavior of the 11 and 12.7 m pah emission complexes in high - resolution _ spitzer_/irs maps of ngc 7023 , ngc 2023 south and north and m17 . we have introduced a five - component gaussian decomposition of the 11 m emission and a four - component decomposition of the 12.7 m ... | we report new properties of the 11 and 12.7 m emission complexes of polycyclic aromatic hydrocarbons ( pahs ) by applying a gaussian - based decomposition technique . using high - resolution _ spitzer _ space telescope data , we study in detail the spectral and spatial characteristics of the 11 and 12.7 m emission ba... | we report new properties of the 11 and 12.7 m emission complexes of polycyclic aromatic hydrocarbons ( pahs ) by applying a gaussian - based decomposition technique . using high - resolution _ spitzer _ space telescope data , we study in detail the spectral and spatial characteristics of the 11 and 12.7 m emission ba... |
astro-ph9807246 | i | the origin of the low - redshift ly@xmath0 absorption clouds discovered by the _ hubble space telescope _ ( bahcall et al . 1991 ; morris et al . 1991 ; stocke et al . 1995 ) remains a mystery , made more tantalizing by the possibility that they may contain significant mass . are they remnants of the high - redshift l... | we report observations from the _ hubble space telescope _ ( hst ) and the vla on the galactic environment , metallicity , and d / h in strong low - redshift ly absorption systems toward the bright bl lac object pks 2155 - 304 . we identify the ly cluster with a group of five h i galaxies offset by kpc from the si... | we report observations from the _ hubble space telescope _ ( hst ) and the vla on the galactic environment , metallicity , and d / h in strong low - redshift ly absorption systems toward the bright bl lac object pks 2155 - 304 . these studies are intended to clarify the origin and chemical evolution of gas at large ... |
astro-ph9807246 | r | the combined hst and vla data suggest that the 17,000 km s@xmath2 ly@xmath0 absorption lines arise in a group environment . between 16,100 and 18,100 km s@xmath2 , we observe 6 ly@xmath0 absorbers and four large ( vla ) galaxies at similar velocities . the velocity centroid and radial velocity dispersion of the fo... | these studies are intended to clarify the origin and chemical evolution of gas at large distances from galaxies . with ghrs / g160 m data at km s resolution , we detect a total of 14 ly absorbers , six of them clustered between and 18,500 km s . although _ orfeus _ studies claimed lyman continuum ( lyc ) absorption... | we report observations from the _ hubble space telescope _ ( hst ) and the vla on the galactic environment , metallicity , and d / h in strong low - redshift ly absorption systems toward the bright bl lac object pks 2155 - 304 . these studies are intended to clarify the origin and chemical evolution of gas at large ... |
astro-ph9807246 | c | the sightline to pks 2155 - 304 is unique among the agn studied thus far for low - redshift ly@xmath0 absorbers . it has the highest frequency of absorbers , and they are identified with a concentration of bright galaxies . the ly@xmath0 absorbers at @xmath29 km s@xmath2 may be an extreme example of the previousl... | the ly absorption could also arise from an extended sheet of intragroup gas , or from smaller primordial clouds and halos of dwarf galaxies . photoionization models yield ( ) limits of ( si / h ) , ( c / h ) , and ( d / h ) if n(h i ) has the _ orfeus _ value of . however , the current data suggest that the interg... | we report observations from the _ hubble space telescope _ ( hst ) and the vla on the galactic environment , metallicity , and d / h in strong low - redshift ly absorption systems toward the bright bl lac object pks 2155 - 304 . these studies are intended to clarify the origin and chemical evolution of gas at large ... |
1607.07732 | i | ultraviolet and x - ray observations have demonstrated that among main sequence stars stellar coronae are a ubiquitous phenomenon , with coronal emissions being detectable for all stars with spectral types later than a5 v ( e.g. , * ? ? ? this is not the case , however , above the main sequence . for giant stars , f a... | we report on an ultraviolet spectroscopic survey of red giants observed by the _ hubble space telescope _ , focusing on spectra of the mg ii h & k lines near 2800 in order to study stellar chromospheric emission , winds , and astrospheric absorption . this absorption signature had previously only been detected for ... | we report on an ultraviolet spectroscopic survey of red giants observed by the _ hubble space telescope _ , focusing on spectra of the mg ii h & k lines near 2800 in order to study stellar chromospheric emission , winds , and astrospheric absorption . we focus on spectral types between k2 iii and m5 iii , a spect... |
1607.07732 | i | we have analyzed the chromospheric mg ii h & k lines of k2-m5 iii stars observed by hst , consisting of 9 observations obtained as part of a new hst red giant survey , and 4 archival targets . our findings are summarized as follows : 1 . the mg ii line profiles of all 13 stars in our sample show evidence for stel... | we find a very tight relation between mg ii surface flux and photospheric temperature , supporting the notion that all k2-m5 iii stars are emitting at a basal flux level . wind velocities ( ) are generally found to decrease with spectral type , with decreasing from km s at k2 iii to km s at m5 iii . for the three... | we report on an ultraviolet spectroscopic survey of red giants observed by the _ hubble space telescope _ , focusing on spectra of the mg ii h & k lines near 2800 in order to study stellar chromospheric emission , winds , and astrospheric absorption . we focus on spectral types between k2 iii and m5 iii , a spect... |
1001.1612 | i | magnetic field strengths on the surface of accreting x - ray pulsars can be measured accurately by observing cyclotron resonant scattering feature ( crsf ) , because the fundamental electron cyclotron resonance energy @xmath9 is described as @xmath10 . here , @xmath11 is the magnetic field strength in units of @xmath12... | the kev source luminosity varied between and erg s , assuming a distance of 7 kpc . in contrast , the second harmonic energy changed from to kev , implying a weaker fractional change as a function of the luminosity . as a result , the observed resonance energy ratio between the second harmonic and the fundamental was w... | we report on changes of the cyclotron resonance energies of the recurrent transient pulsar , x0331 + 53 ( v0332 + 53 ) . the whole _ rxte _ data acquired in the 2004 - 2005 outburst were utilized . the kev source luminosity varied between and erg s , assuming a distance of 7 kpc . we confirmed that the fundamental cycl... |
astro-ph0612389 | i | most part of the solar surface is covered by quiet regions that appear non - magnetic in typical solar magnetograms . however , the investigation of such apparently non - magnetic regions is of great scientific interest , and it is important to determine how much photospheric magnetic flux remains hidden from view . th... | we report on spectropolarimetric observations of a near - ir line of located at 15262.702 whose intensity and polarization profiles are very sensitive to the presence of hyperfine structure . this line ratio technique is applied to spectropolarimetric observations of the quiet solar photosphere in order to explore th... | we report on spectropolarimetric observations of a near - ir line of located at 15262.702 whose intensity and polarization profiles are very sensitive to the presence of hyperfine structure . a theoretical investigation of the magnetic sensitivity of this line to the magnetic field uncovers several interesting proper... |
astro-ph0612389 | r | even after applying the above - mentioned noise reduction technique , the observations do not allow us to investigate in detail the stokes @xmath45 profiles pixel by pixel . therefore , we have focused on a statistical approach by means of a stokes @xmath45 profile classification . in order to perform this classificati... | particular attention is given to the quietest area of the observed field of view , which was encircled by an enhanced network region . a detailed theoretical investigation shows that the inferred distribution yields information on the average magnetic field strength and the spatial scale at which the magnetic field is ... | we report on spectropolarimetric observations of a near - ir line of located at 15262.702 whose intensity and polarization profiles are very sensitive to the presence of hyperfine structure . a theoretical investigation of the magnetic sensitivity of this line to the magnetic field uncovers several interesting proper... |
astro-ph0309339 | r | the observed spectra of the sample galaxies are shown in figure 1 . these spectra indicate a wide range of optical properties in spite of having nearly similar nir and fir luminosities . spectra are arranged according to their colors in order to easily visualize the gradual change from blue ( ngc4385 ) to red ( ngc481... | our study is based on new optical spectra and previously published k - band photometric data , both sampling the same area around the nucleus . the model is able to reproduce simultaneously the equivalent widths of emission and absorption lines , the continuum fluxes between 35007000 , the k - band and the fir flux . w... | we report on the star formation histories and extinction in the central kpc region of a sample of starburst galaxies that have similar far infrared ( fir ) , 10 m and k - band luminosities as those of the archetype starburst m82 . our study is based on new optical spectra and previously published k - band photometric d... |
astro-ph0309339 | i | we have analyzed optical spectra of a sample of starburst galaxies that have their far infrared , 10@xmath0 m , and k - band luminosities similar to those of the prototype starburst m82 . we have adopted a theoretical approach that allows us to resolve their star formation history into three major episodes , the on - g... | we report on the star formation histories and extinction in the central kpc region of a sample of starburst galaxies that have similar far infrared ( fir ) , 10 m and k - band luminosities as those of the archetype starburst m82 . model starburst spectra were synthesized as a combination of stellar populations of disti... | we report on the star formation histories and extinction in the central kpc region of a sample of starburst galaxies that have similar far infrared ( fir ) , 10 m and k - band luminosities as those of the archetype starburst m82 . our study is based on new optical spectra and previously published k - band photometric d... |
1401.2994 | c | our analysis of the two - dimensional projected distribution of the gc and lmxb populations of the giant virgo elliptical ngc4649 ( m60 ) confirms a well - known feature of this gc system , that red gcs are more centrally concentrated than blue gcs , as usually observed in elliptical galaxies ( e.g. , @xcite ; see als... | we report significant anisotropies in the projected two - dimensional ( 2d ) spatial distributions of globular clusters ( gcs ) of the giant virgo elliptical galaxy ngc4649 ( m60 ) . deviations from azimuthal symmetry suggest an arc - like excess of gcs extending north at 4 - 15 kpc galactocentric radii in the eastern ... | we report significant anisotropies in the projected two - dimensional ( 2d ) spatial distributions of globular clusters ( gcs ) of the giant virgo elliptical galaxy ngc4649 ( m60 ) . similar features are found in the 2d distribution of low - mass x - ray binaries ( lmxbs ) , both associated with gcs and in the stellar ... |
1401.2994 | i | our analysis of the 2d projected distribution of the gc and lmxb populations of the giant virgo elliptical ngc4649 ( m60 ) has led to the following results : * there are significant 2d asymmetries in the projected distributions of both gcs and lmxbs . * red gcs are more centrally concentrated than blue gcs , as usua... | these results suggest that ngc4649 has experienced mergers and/or multiple accretions of less massive satellite galaxies during its evolution , of which the gcs in the arc may be the fossil remnant . we also detect a luminosity enhancement in the x - ray source population of the companion spiral galaxy ngc4647 . we sug... | we report significant anisotropies in the projected two - dimensional ( 2d ) spatial distributions of globular clusters ( gcs ) of the giant virgo elliptical galaxy ngc4649 ( m60 ) . similar features are found in the 2d distribution of low - mass x - ray binaries ( lmxbs ) , both associated with gcs and in the stellar ... |
0710.2668 | i | the galactic center ( gc ) is the only place where we can observe parsec details of various interaction in and around the galactic nucleus . advances in this research frontier rely primarily on observations at radio , infrared and x - ray wavelengths , because the optical band suffers seriously from a considerable exti... | fitted with the simple absorbed power - law model , the measured x - ray flux from an individual filament in the kev band is to ergs s and the absorption - corrected x - ray luminosity is ergs s at a presumed distance of 8 kpc to the gc . | we report the detection of 10 new x - ray filaments using the data from the _ chandra _ x - ray satellite for the inner ( parsec ) around the galactic center ( gc ) . all these x - ray filaments are characterized by non - thermal energy spectra , and most of them have point - like features at their heads that point inw... |
0710.2668 | c | while x - ray photon numbers may not be high enough to constrain the exact shapes of the energy spectra , all spectra appear featureless except for filament f3 showing weak iron line features ( see section 3.3 ) and can be well fitted with power - law models . fitting of some of these energy spectra with thermal emissi... | we report the detection of 10 new x - ray filaments using the data from the _ chandra _ x - ray satellite for the inner ( parsec ) around the galactic center ( gc ) . we speculate the origin(s ) of these filaments by morphologies and by comparing their x - ray images with the corresponding radio and infrared images . o... | we report the detection of 10 new x - ray filaments using the data from the _ chandra _ x - ray satellite for the inner ( parsec ) around the galactic center ( gc ) . all these x - ray filaments are characterized by non - thermal energy spectra , and most of them have point - like features at their heads that point inw... |
1302.3883 | i | stars form in cores deeply embedded within dense molecular clouds by gravitational collapse . as an inseparable part of the star formation process , released gravitational energy from the central protostar heats the surrounding infalling envelope , and angular momentum is shedded via powerful bipolar outflows . these f... | we report the detection of a unique co ice band toward the deeply embedded , low - mass protostar . spitzer space telescope _ , reveals a 15.2 co ice bending mode profile that can not modeled with the same ice structure typically found toward other protostars . we develop a modified co ice profile decomposition , inclu... | we report the detection of a unique co ice band toward the deeply embedded , low - mass protostar . our spectrum , obtained with the infrared spectrograph onboard the _ spitzer space telescope _ , reveals a 15.2 co ice bending mode profile that can not modeled with the same ice structure typically found toward other pr... |
1302.3883 | c | the _ spitzer_-irs sh spectrum toward the low - mass protostar reveals a rare 15.2 @xmath1 co@xmath0 bending mode profile , exhibiting a prominent double - peaked substructure ( near 15.05 and 15.24 @xmath1 ) and a strong blue absorption wing . our analysis demonstrates that the observed bending mode can not be modeled... | , we find that 87 - 92% of the co is sequestered as spherical , co-rich mantles , while typical interstellar ices show evidence of irregularly - shaped , hydrogen - rich mantles . we propose that ( 1 ) the nearly complete absence of unprocessed ices along the line - of - sight is due to the flattened envelope structure... | we report the detection of a unique co ice band toward the deeply embedded , low - mass protostar . our spectrum , obtained with the infrared spectrograph onboard the _ spitzer space telescope _ , reveals a 15.2 co ice bending mode profile that can not modeled with the same ice structure typically found toward other pr... |
1306.3157 | r | in this section we present the orbit solution of the tyc 3010 system . first we show how the data initially suggested a spurious solution in which tyc 3010 is a single star with a bd companion . next we present the correct solution , in which tyc 3010 is shown to be a double - lined spectroscopic stellar binary ( sb... | we report the discovery of a highly eccentric , double - lined spectroscopic binary star system ( tyc 3010 - 1494 - 1 ) , comprising two solar - type stars that we had initially identified as a single star with a brown dwarf companion . at the moderate resolving power of the marvels | we report the discovery of a highly eccentric , double - lined spectroscopic binary star system ( tyc 3010 - 1494 - 1 ) , comprising two solar - type stars that we had initially identified as a single star with a brown dwarf companion . at the moderate resolving power of the marvels spectrograph and the spectrographs ... |
1306.3157 | i | we have demonstrated , using high resolution spectroscopy , that tyc 3010 is an sb2 . we have shown how , with a spectrograph below a given resolution ( @xmath204 ) , the eccentricity and the orientation of the system with respect to our line - of - sight allowed a large fraction of the rv curve to appear remarkably s... | at least three properties of this system allow it to masquerade as a single star with a very low - mass companion : its large eccentricity ( ) , its relatively long period ( days ) , and the approximately perpendicular orientation of the semi - major axis with respect to the line of sight ( ) . as a result of these pro... | we report the discovery of a highly eccentric , double - lined spectroscopic binary star system ( tyc 3010 - 1494 - 1 ) , comprising two solar - type stars that we had initially identified as a single star with a brown dwarf companion . at the moderate resolving power of the marvels spectrograph and the spectrographs ... |
astro-ph0606232 | i | we have carried out spectroscopic observations toward the herbig - haro objects hh711 and hh54 over the @xmath0 region using the infrared spectrograph of the _ spitzer space telescope _ , and have thereby mapped the s(0 ) s(7 ) pure rotational lines of molecular hydrogen , together with emissions in fine structure tra... | we report the results of spectroscopic mapping observations carried out toward the herbig - haro objects hh711 and hh54 over the region using the infrared spectrograph of the _ spitzer space telescope_. these observations have led to the detection and mapping of the s(0 ) s(7 ) pure rotational lines of molecular hydro... | we report the results of spectroscopic mapping observations carried out toward the herbig - haro objects hh711 and hh54 over the region using the infrared spectrograph of the _ spitzer space telescope_. these observations have led to the detection and mapping of the s(0 ) s(7 ) pure rotational lines of molecular hydro... |
hep-ph0306082 | i | most of the _ nlo _ radiative corrections to rates have been done quite some years ago . in fact , two loop _ nnlo _ calculations for rates are now becoming quite standard . in @xmath3annihilation one is even pushing hard to determine the _ nnnnlo _ corrections to the @xmath4 ratio @xcite . contrary to this , many _ n... | many high order radiative corrections exists for rates but not many _ nlo _ radiative corrections exist for polarization observables . the radiative correction calculations for polarization observables are somewhat more complicated than those for rates . we include mass effects which significantly complicate the radiat... | we review the physics of polarization observables in high energy reactions in general and discuss the status of _ nlo _ one loop corrections to these observables in specific . many high order radiative corrections exists for rates but not many _ nlo _ radiative corrections exist for polarization observables . the radi... |
nucl-th9510060 | i | the emc effect @xcite is probably one of the topics in the interplay of nuclear and particle physics which has attracted more attention . pioneering work on fermi motion and pionic effects @xcite was followed by many different ideas like binding of the nucleons in the nucleus , multiquark cluster effects or @xmath4 res... | in addition we also consider effects from-meson renormalization in the nucleus . the use of many body feynman diagrams in a relativistic framework allows one to avoid using prescriptions given in the past to introduce relativistic corrections in a non relativistic formalism . we show that with realistic nucleon spec... | we revise the conventional nuclear effects of fermi motion , binding and pionic effects in deep inelastic lepton scattering using a relativistic formalism for an interacting fermi sea and the local density approximation to translate results from nuclear matter to finite nuclei . in addition we also consider effects fro... |
nucl-th9510060 | c | we have evaluated the nucleonic and mesonic contributions to the ratio @xmath80 of the @xmath296 effect , with particular emphasis on an accurate treatment of effects shown in the past to be relevant , like binding effects , fermi motion and a dynamical ( non static ) treatment of the nucleons and the mesons in the med... | we revise the conventional nuclear effects of fermi motion , binding and pionic effects in deep inelastic lepton scattering using a relativistic formalism for an interacting fermi sea and the local density approximation to translate results from nuclear matter to finite nuclei . 1.5 cm -1 in 5.5 in 0.5 in | we revise the conventional nuclear effects of fermi motion , binding and pionic effects in deep inelastic lepton scattering using a relativistic formalism for an interacting fermi sea and the local density approximation to translate results from nuclear matter to finite nuclei . in addition we also consider effects fro... |
quant-ph0303130 | i | one of the most important potential applications of quantum computers ( qc s ) is studies of quantum many - body effects . it is particularly interesting to find new many - body effects in condensed - matter systems that could be easily simulated on a qc . in the present paper we discuss one such effect : antiresonance... | we show that , in a system with defects , two - particle states may experience destructive quantum interference , or antiresonance . it prevents an excitation localized on a defect from decaying even where the decay is allowed by energy conservation . it corresponds to a qubit with the level spacing different from othe... | we show that , in a system with defects , two - particle states may experience destructive quantum interference , or antiresonance . it prevents an excitation localized on a defect from decaying even where the decay is allowed by energy conservation . the system studied is a qubit chain or an equivalent spin chain with... |
1001.1540 | i | any probability measure @xmath3 on the real line , all of whose moments are finite , has associated to it two sequences of jacobi parameters @xmath4 : for example , @xmath3 is the spectral measure of the tridiagonal matrix @xmath5 we will denote this fact by @xmath6 with @xmath7 , @xmath8 . these parameters are related... | we show that a convolution semigroup of measures has jacobi parameters polynomial in the convolution parameter if and only if the measures come from the meixner class . this class of two - state free convolution semigroups has not been considered explicitly before . we show that it also has meixner - type properties . ... | we show that a convolution semigroup of measures has jacobi parameters polynomial in the convolution parameter if and only if the measures come from the meixner class . moreover , we prove the parallel result , in a more explicit way , for the free convolution and the free meixner class . we then construct the class of... |
1407.8284 | m | in this part of the supplementary material we provide the basic physical background as well the technical details of our density - operator approach to thermotransport through strongly interacting nanostructures . it combines the general reduced density - operator approach , accounting for the strong local interaction ... | we illustrate this for an anderson quantum dot accounting for the first two leading orders of the tunneling in a master equation . the often made assumption that off - resonant transport proceeds entirely by virtual occupation of charge states , underlying exchange - scattering models , can fail dramatically for heat t... | we show that charge fluctuation processes are crucial for the nonlinear heat conductance through an interacting nanostructure , even far from a resonance . we illustrate this for an anderson quantum dot accounting for the first two leading orders of the tunneling in a master equation . the often made assumption that of... |
1407.8284 | r | in this second part of the supporting information we present additional results and discussion addressing specific issues raised in the main article . [ [ scaling - with - parametersorder - of - magnitude - of - charge - energy - and - heat - currentsecscaling - analysis ] ] scaling with parameters order of magnitu... | we show that charge fluctuation processes are crucial for the nonlinear heat conductance through an interacting nanostructure , even far from a resonance . negative _ differential heat conductance relative to the heat current . these can go unnoticed in the charge current , making nonlinear _ heat - transport spectrosc... | we show that charge fluctuation processes are crucial for the nonlinear heat conductance through an interacting nanostructure , even far from a resonance . we illustrate this for an anderson quantum dot accounting for the first two leading orders of the tunneling in a master equation . the often made assumption that of... |
astro-ph0301247 | i | the inner region of dark matter halos in n body simulations is certainly virialized . a precise detection of the boundaries of such a region , however , is a long lasting and not yet completely solved problem . if we try just to identify a `` collapsed '' region , @xmath20 a region detached from the cosmological expa... | we show that dark matter halos , in n body simulations , have a _ boundary layer _ ( bl ) , which neatly separates dynamically bound mass from unbound materials . we define and as the differential kinetic and potential energy of halos and evaluate them in spherical shells . we notice that , in simulated halos , such d... | we show that dark matter halos , in n body simulations , have a _ boundary layer _ ( bl ) , which neatly separates dynamically bound mass from unbound materials . we define and as the differential kinetic and potential energy of halos and evaluate them in spherical shells . we notice that , in simulated halos , such d... |
astro-ph0301247 | c | observational work on galaxy clusters made a giant leap forward thanks to x ray observations and , in turn , cluster data are providing more and more cosmological information . the rosat all sky survey ( rass ) allowed the extraction of large samples of galaxy clusters , like reflex ( boehringer et al . 2001 ) or nora... | those clusters which appear not to have a bl are seen to be undergoing major merging processes and to grossly violate spherical symmetry . first of all , the mass it encloses almost coincides with the mass , evaluated from the velocities of all particles within , according to the virial theorem . also , materials at ar... | we show that dark matter halos , in n body simulations , have a _ boundary layer _ ( bl ) , which neatly separates dynamically bound mass from unbound materials . we define and as the differential kinetic and potential energy of halos and evaluate them in spherical shells . we notice that , in simulated halos , such d... |
1203.5544 | i | baryon number violation is a very sensitive probe of physics beyond the standard model ( sm ) . interactions which violate baryon number ( @xmath8 ) are not present in the renormalizable part of the sm lagrangian , but they can arise as effective higher dimensional operators . the lowest @xmath8violating operators @xci... | these operators , which violate , lead to unconventional decays of the nucleon such as and . in two step breaking schemes of non - supersymmetric , nucleon lifetime for decays into these modes is found to be within reach of experiments . we also identify supersymmetric scenarios where these decays may be accessible , ... | we show that grand unified theories based on generate naturally the next to leading baryon number violating operators of dimension seven . these operators , which violate , lead to unconventional decays of the nucleon such as and . in two step breaking schemes of non - supersymmetric , nucleon lifetime for decays in... |
1004.3435 | i | quasicontinuum methods are a prototypical class of multiscale models that directly couple multiple modeling regions to reduce the computational complexity of modelling large atomistic systems . these methods are useful for computing the interaction of localized material defects such as crack tips or dislocations with l... | moreover , we establish a bound on the condition number of a matrix of eigenvectors that is uniform in the number of atoms and the size of the atomistic region . these results establish the validity of and improve upon recent conjectures ( ( * ? ? ? * conjecture 2 ) and ( * ? ? ? * conjecture 8) ) which were based on n... | we show under general conditions that the linearized force - based quasicontinuum ( qcf ) operator has a positive spectrum , which is identical to the spectrum of the quasinonlocal quasicontinuum ( qnl ) operator in the case of second - neighbour interactions . moreover , we establish a bound on the condition number of... |
0712.4022 | c | we have studied the short time semiconductor response with respect to resonant high intensity excitations . the main results are obtained neglecting the slow dynamics , that is on the time scale provided by detuning . we have calculated exactly the excitation polarization @xmath349 in the coherent limit . we have found... | we studied both the single and double pulse excitations . for the latter case we considered the time evolution of the multi - wave mixing exciton polarization . the main difference between the excitation by a single pulse or by two non - collinear pulses is that the rabi oscillations of the multi - wave mixing response... | we studied the semiconductor response with respect to high intensity resonant excitation on short time scale when the contribution of the fermi statistics of the electrons and holes prevails . we studied both the single and double pulse excitations . for the latter case we considered the time evolution of the multi - w... |
hep-th9701082 | i | the dramatic progress that has been claimed in understanding black holes in the context of string theory @xcite in the past year focuses attention upon the implications that strings might have for cosmology . the early universe provides a natural arena in which to seek observational evidence for string theory as a fun... | +newman laboratory of nuclear studies , cornell university , ithaca ny14853 , u.s.a . +department of mathematics , university of waikato , private bag , hamilton , new zealand +department of physics , waseda university , 3 - 4 - 1 okubo , shinjuku - ku , tokyo 169 , japan +school of mathematical studies , university of... | we study axion - dilaton cosmologies derived from the low - energy string effective action . we present the classical homogeneous friedmann - robertson - walker solutions and derive the semi - classical perturbation spectra in the dilaton , axion and moduli fields in the pre - big bang scenario . by constructing the un... |
1310.4724 | i | the _ outer billiard _ about a convex compact region @xmath0 is the map @xmath1 introduced by m. day @xcite . for @xmath2 , let @xmath3 be the ray through @xmath4 intersecting tangentially @xmath5 on the right with respect to the obvious orientation . suppose first that @xmath5 is strictly convex , and let @xmath6 be... | we study dissipative polygonal outer billiards , i.e. outer billiards about convex polygons with a contractive reflection law . we prove that dissipative outer billiards about any triangle and the square are asymptotically periodic , i.e. they have finitely many global attracting periodic orbits . finally , we describe... | we study dissipative polygonal outer billiards , i.e. outer billiards about convex polygons with a contractive reflection law . we prove that dissipative outer billiards about any triangle and the square are asymptotically periodic , i.e. they have finitely many global attracting periodic orbits . a complete descriptio... |
cond-mat9609118 | i | an interacting electron gas in one dimension has many unusual properties , such as the spin - charge separation , the power law of correlation functions , and the linear dependence of the electron relaxation rate on temperature and frequency ( see ref.@xcite for a review ) . these one - dimensional ( 1d ) results are w... | we study instabilities occurring in the electron system whose fermi surface has flat regions on its opposite sides . numerical solutions of the parquet equations are found to be in qualitative agreement with a ladder approximation . for the repulsive hubbard interaction , the antiferromagnetic ( spin - density - wave )... | we study instabilities occurring in the electron system whose fermi surface has flat regions on its opposite sides . such a fermi surface resembles fermi surfaces of some high- superconductors . in the framework of the parquet approximation , we classify possible instabilities and derive renormalization - group equatio... |
hep-th0505083 | i | a surprising interpretation of a possible connection @xcite between topological strings on calabi - yau threefolds and statistical models of crystal melting , known as random plane partitions , has been advocated . it is conjectured @xcite that the statistical model is nothing but a quantum gravitational path integral ... | we study khler gravity on local geometry and describe precise correspondence with certain supersymmetric gauge theories and random plane partitions . we count these quanta in a relative manner by measuring a deviation of the local geometry from a singular calabi - yau threefold , that is a singularity fibred over . the... | we study khler gravity on local geometry and describe precise correspondence with certain supersymmetric gauge theories and random plane partitions . the local geometry is discretized , via the geometric quantization , to a foam of an infinite number of gravitational quanta . we count these quanta in a relative manner ... |
1401.3423 | i | stochastic dynamical systems that model the evolution of a large collection of weakly interacting particles have long been studied in statistical mechanics ( cf . @xcite and references therein ) . in recent years such models have been considered in many other application areas as well , some examples include , chemical... | we study long time behavior of a discrete time weakly interacting particle system , and the corresponding nonlinear markov process in , described in terms of a general stochastic evolution equation . in a setting where the state space of the particles is compact such questions have been studied in previous works , howe... | we study long time behavior of a discrete time weakly interacting particle system , and the corresponding nonlinear markov process in , described in terms of a general stochastic evolution equation . in a setting where the state space of the particles is compact such questions have been studied in previous works , howe... |
1408.6785 | i | in this paper , we studied the magnetic properties of two spin models on a fcc lattice with tetragonal lattice symmetry , using several analytical techniques and monte carlo simulations . the results should be applicable to insulating magnetic double perovskites with a single magnetic species , in which orbital degener... | we study magnetism on the fcc lattice with tetragonal distortions , with general exotic directional magnetic interactions allowed by symmetry . we consider two models , corresponding to a uniform tetragonal distortion , or a two - sublattice model with a tetragonal screw axis . we establish their low temperature phase ... | we study magnetism on the fcc lattice with tetragonal distortions , with general exotic directional magnetic interactions allowed by symmetry . we consider two models , corresponding to a uniform tetragonal distortion , or a two - sublattice model with a tetragonal screw axis . we establish their low temperature phase ... |
hep-th0601003 | i | implementing the idea of split supersymmetry @xcite in string theory is straightforward @xcite . the appropriate framework is type i theory @xcite compactified in four dimensions in the presence of constant internal magnetic fields @xcite , or equivalently @xmath1-branes intersecting at angles @xcite in the @xmath... | we study string realizations of split extended supersymmetry , recently proposed in hep - ph/0507192 . we show through an explicit one - loop string amplitude computation that gauginos acquire hierarchically smaller dirac masses . we also evaluate the one - loop higgsino mass , , and show that , in the absence of tree ... | we study string realizations of split extended supersymmetry , recently proposed in hep - ph/0507192 . supersymmetry is broken by small ( ) deformations of intersection angles of-branes giving tree - level masses of order , where is the string scale , to localized scalars . we show through an explicit one - loop string... |
cond-mat0005302 | i | bose - einstein condensation of an ideal gas is typically presented in introductory textbooks solely in terms of particle numbers . and quantum mechanically enhanced number densities were the ` smoking gun ' observed in the first experiments on dilute gas condensates . but many phenomena of interacting condensates depe... | we use a two - mode model to describe the phase coherence between the two halves of the condensate . this allows to get the tunneling coupling between the two wells and the on - site energy as a function of the barrier height . we describe the internal and external degrees of freedom by variational ansatz . | we study the dynamic process of splitting a condensate by raising a potential barrier in the center of a harmonic trap . we use a two - mode model to describe the phase coherence between the two halves of the condensate . furthermore , we explicitly consider the spatial dependence of the mode funtions , which varies de... |
1603.09356 | i | the @xmath0-cold dark matter ( @xmath0cdm ) scenario , combined with the theory of cosmic inflation , is the successful , concurrent model describing the past and the present of our universe , consistent with a wide range of observations . in this scenario , cosmological structures grow out of an extremely uniform dens... | we study the dynamical effect of relative velocities between dark matter and baryonic fluids , which remained supersonic after the epoch of recombination . , they limited the large - scale density environment to be those of the global mean density . we improve on their formulation by allowing variation in the density e... | we study the dynamical effect of relative velocities between dark matter and baryonic fluids , which remained supersonic after the epoch of recombination . the impact of this supersonic motion on the formation of cosmological structures was first formulated by , in terms of the linear theory of small - scale fluctuatio... |
1603.09356 | c | we investigated the impact of the relative velocity ( streaming velocity ) between cdm and baryons on the small - scale structure formation . th first studied this effect by adopting a trivial solution to the large - scale velocity and density fields . because velocity fields are correlated with density fields , howeve... | this leads to a new type of coupling between large - scale and small - scale modes . we also find that the net effect on the global power spectrum of the density fluctuation is to boost its overall amplitude from the prediction by . correspondingly , the conditional mass function of cosmological halos and the halo bias... | we study the dynamical effect of relative velocities between dark matter and baryonic fluids , which remained supersonic after the epoch of recombination . the impact of this supersonic motion on the formation of cosmological structures was first formulated by , in terms of the linear theory of small - scale fluctuatio... |
0908.3188 | i | in recent years , the study of the nonequilibrium dynamics of isolated quantum systems has attracted a great deal of attention . the main motivation for these studies lies behind the spectacular success that experimentalists have achieved in trapping and manipulating ultracold quantum gases . this has allowed them to ,... | we show that while the relaxation dynamics and thermalization of for fermions is very similar to the one of hardcore bosons , the behavior of is distinctively different . more generally , we find that thermalization occurs far away from integrability and that it breaks down as one approaches the integrable point . | we study the dynamics and thermalization of strongly correlated fermions in finite one - dimensional lattices after a quantum quench . our calculations are performed using exact diagonalization . we focus on one- and two - body observables such as the momentum distribution function [ and the density - density structure... |
0908.3188 | i | we have presented a detailed study of the relaxation dynamics after a quantum quench and the description after relaxation of the momentum distribution function @xmath3 ( a one - particle observable ) and the density - density structure factor @xmath2 ( a two - particle observable ) of spinless fermions with nearest and... | we study the dynamics and thermalization of strongly correlated fermions in finite one - dimensional lattices after a quantum quench . we focus on one- and two - body observables such as the momentum distribution function [ and the density - density structure factor [ , respectively , and study the effects of approachi... | we study the dynamics and thermalization of strongly correlated fermions in finite one - dimensional lattices after a quantum quench . our calculations are performed using exact diagonalization . we focus on one- and two - body observables such as the momentum distribution function [ and the density - density structure... |
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