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astro-ph0603249 | c | we performed a large number of axisymmetric mhd simulations and did extensive analysis of the interaction of a rapidly rotating magnetized star with an accretion disk in the propeller regime . the results can be divided to two classes , strong " propellers and weak " propellers . the strong " propeller is characteri... | we present results of axisymmetric magnetohydrodynamic simulations of the interaction of a rapidly rotating , magnetized star with an accretion disk . the strong propellers are characterized by a powerful disk wind and a collimated magnetically dominated outflow or jet from the star . . the propeller mechanism may be r... | we present results of axisymmetric magnetohydrodynamic simulations of the interaction of a rapidly rotating , magnetized star with an accretion disk . the disk is considered to have a finite viscosity and magnetic diffusivity . the main parameters of the system are the star s angular velocity and magnetic moment , and ... |
1507.03017 | i | star - forming galaxies show a relatively tight correlation between their star - formation rate ( sfr ) and stellar mass . this relation , commonly known as the star - forming _ `` main sequence '' _ @xcite , has been intensively studied over the past decade ( e.g. , at @xmath8 , * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ?... | we present results on the star - formation rate ( sfr ) versus stellar mass ( ) relation ( i.e. , the `` main sequence '' ) among star - forming galaxies at 1.37.61 using the mosfire deep evolution field ( mosdef ) survey . based on a sample of 261 galaxies with h and h spectroscopy , we have estimated robust dust - co... | we present results on the star - formation rate ( sfr ) versus stellar mass ( ) relation ( i.e. , the `` main sequence '' ) among star - forming galaxies at 1.37.61 using the mosfire deep evolution field ( mosdef ) survey . based on a sample of 261 galaxies with h and h spectroscopy , we have estimated robust dust - co... |
1507.03017 | c | as part of the mosdef survey , we used a sample of 185 star - forming galaxies with h@xmath3 and h@xmath4 spectroscopy at @xmath49 to study the star - forming main sequence relation at @xmath8 . the parent catalog is _ h_-band ( i.e. , rest - frame optically ) selected and is accompanied by ancillary multi - band photo... | we find that different assumptions for the dust correction , such as using the color - excess of the stellar continuum to correct the nebular lines , sample selection biases against red star - forming galaxies , and not accounting for balmer absorption can yield steeper slopes of the log(sfr)-log( ) relation . based on... | we present results on the star - formation rate ( sfr ) versus stellar mass ( ) relation ( i.e. , the `` main sequence '' ) among star - forming galaxies at 1.37.61 using the mosfire deep evolution field ( mosdef ) survey . based on a sample of 261 galaxies with h and h spectroscopy , we have estimated robust dust - co... |
0704.1245 | r | this survey of single pointing observations towards 23 massive star forming regions is meant as an initial , uniform survey from which to base future observations . with these observations , we can only comment on the molecular gas component within our beams ; we can not discuss the larger scale molecular dynamics , or... | we present single pointing observations of sio , hco and hco from the james clerk maxwell telescope towards 23 massive star forming regions previously known to contain molecular outflows and ultracompact hii regions . we serendipitously detected so towards 17 sources in the same tuning as hco . we also find that the ab... | we present single pointing observations of sio , hco and hco from the james clerk maxwell telescope towards 23 massive star forming regions previously known to contain molecular outflows and ultracompact hii regions . we detected sio towards 14 sources and suggest that the non - detections in the other nine sources cou... |
0704.1245 | c | without maps of each region , it is impossible to tell how much of the hco@xmath0 emission in the line center and in the line wings is due directly to infall and outflow motions ; however , based on the arguments we have presented above , we suggest that ten sources show infall motions , and all 23 source show outflow ... | we detected sio towards 14 sources and suggest that the non - detections in the other nine sources could be due to those outflows being older and without ongoing shocks to replenish the sio . we detected hco towards all sources , and suggest that it is tracing infall in nine cases . for seven infall candidates , we est... | we present single pointing observations of sio , hco and hco from the james clerk maxwell telescope towards 23 massive star forming regions previously known to contain molecular outflows and ultracompact hii regions . we detected sio towards 14 sources and suggest that the non - detections in the other nine sources cou... |
0708.2578 | i | high - redshift quasars are among the most luminous objects known and provide direct probes of the distant universe when the first generation of galaxies and quasars formed . in recent years , over twenty @xmath0 quasars with @xmath20 have been discovered ( e.g. * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? *... | we present the discovery of five quasars at selected from 260 deg of the sloan digital sky survey ( sdss ) southern survey , a deep imaging survey obtained by repeatedly scanning a stripe along the celestial equator . one of them was independently discovered by the ukirt infrared deep sky survey . these quasars , combi... | we present the discovery of five quasars at selected from 260 deg of the sloan digital sky survey ( sdss ) southern survey , a deep imaging survey obtained by repeatedly scanning a stripe along the celestial equator . the five quasars with are 12 magnitudes fainter than the luminous quasars discovered in the sdss main ... |
0708.2578 | i | we have discovered five quasars at @xmath129 in 260 deg@xmath1 of the sdss deep stripe , including one previously discovered by @xcite . the most distant one is at @xmath28 . these quasars were selected as @xmath23-dropout objects from the coadds of 10 sdss imaging runs , going @xmath132 magnitudes fainter than the sds... | the five quasars with are 12 magnitudes fainter than the luminous quasars discovered in the sdss main survey . the slope calculated from a combination of our sample and the luminous sdss quasar sample is , significantly steeper than the slope of the qlf at . based on the derived qlf , we find that the quasar / agn popu... | we present the discovery of five quasars at selected from 260 deg of the sloan digital sky survey ( sdss ) southern survey , a deep imaging survey obtained by repeatedly scanning a stripe along the celestial equator . the five quasars with are 12 magnitudes fainter than the luminous quasars discovered in the sdss main ... |
1205.5771 | i | we present results of radio continuum observations of the edge - on galaxy , ngc 4631 , using the karl g. jansky very large array ( hereafter , the expanded very large array , or evla ) in its c configuration . these are the first results from a new survey , continuum halos in nearby galaxies an evla survey ( chang -... | chang - es is exploiting the new wide - band , multi - channel capabilities of the karl g. jansky very large array ( i.e. the expanded very large array , or evla ) with observations in two bands centered at 1.5 and 6 ghz in a variety of array configurations with full polarization . these first results are based on c - ... | we present the first results from the chang - es survey , a new survey of 35 edge - on galaxies to search for both in - disk as well as extra - planar radio continuum emission . chang - es is exploiting the new wide - band , multi - channel capabilities of the karl g. jansky very large array ( i.e. the expanded very la... |
1205.5771 | r | these new evla observations , even though they were obtained during a limited test run in a single array configuration ( table [ table : obs - n4631 ] ) , have revealed a number of new features not before seen in ngc 4631 . in this section , our intention is not to make an exhaustive list of all features , but rather... | new disk - halo features have been detected , among them two at 1.5 ghz that appear as loops in projection . this map represents tangent slopes to the intensities within the band centered at 1.5 ghz , rather than fits across widely separated frequencies as has been done in the past and is also the highest spatial re... | we present the first results from the chang - es survey , a new survey of 35 edge - on galaxies to search for both in - disk as well as extra - planar radio continuum emission . chang - es is exploiting the new wide - band , multi - channel capabilities of the karl g. jansky very large array ( i.e. the expanded very la... |
1205.5771 | c | in this paper , we have presented the first results from a new survey , called chang - es , to observe radio continuum halos in 35 edge - on , normal spiral galaxies . the galaxies are being observed in all polarization products in two different bands , 1.5 ghz ( l - band ) and 6 ghz ( c - band ) , and over 3 different... | we present the first results from the chang - es survey , a new survey of 35 edge - on galaxies to search for both in - disk as well as extra - planar radio continuum emission . the motivation and science case for the survey are presented in a companion paper ( paper i ) . we present the first 1.5 ghz spectral index ma... | we present the first results from the chang - es survey , a new survey of 35 edge - on galaxies to search for both in - disk as well as extra - planar radio continuum emission . chang - es is exploiting the new wide - band , multi - channel capabilities of the karl g. jansky very large array ( i.e. the expanded very la... |
1004.0239 | i | long - term ( @xmath0 20 years ) optical light curves are still available only for a relatively small number of active galactic nuclei ( agn ) and blazars . pioneering work in this field was made by several authors ( pica et al . 1988 ; webb et al . 1988 ) on relatively large samples of sources over a time window of ab... | all objects show evident long - term variability , over which short - term variations are superposed . one source , bzb j1058 + 5628 , showed a marked quasi - periodic variability of 1 mag on time scale of about 6.3 years , making it one of the few bl lac objects with a quasi- periodic behavior . | we present the historic photographic light curves of three little known blazars ( two bl lacs and one fsrq ) , bzb j1058 + 5628 , bzq j1148 + 5254 and bzb j1209 + 4119 spanning a time interval of about 50 years , mostly built using the asiago plate archive . all objects show evident long - term variability , over wh... |
1004.0239 | c | pica et al . ( 1988 ) and webb et al . ( 1988 ) studied the long - term behavior of several tens of agns with photographic plates for 15 to 20 years . for 61 sources they had enough data to morphologically classify their light curve in four types : class i flickering without long term trend ; class ii long term trend w... | we present the historic photographic light curves of three little known blazars ( two bl lacs and one fsrq ) , bzb j1058 + 5628 , bzq j1148 + 5254 and bzb j1209 + 4119 spanning a time interval of about 50 years , mostly built using the asiago plate archive . | we present the historic photographic light curves of three little known blazars ( two bl lacs and one fsrq ) , bzb j1058 + 5628 , bzq j1148 + 5254 and bzb j1209 + 4119 spanning a time interval of about 50 years , mostly built using the asiago plate archive . all objects show evident long - term variability , over wh... |
1405.5658 | c | we have presented the long - term photometric behavior of v404 lyr which demonstrates total eclipses and multiperiodic pulsations , based on all available data as well as the @xmath0 data . our analyses of 2,922 eclipse timings , spanning more than 18 yrs , reveal that the orbital period of the system has varied due to... | we present the physical properties of v404 lyr exhibiting eclipse timing variations and multiperiodic pulsations from all historical data including the and superwasp observations . detailed analyses of 2,922 minimum epochs showed that the orbital period has varied through a combination with an upward - opening parabola... | we present the physical properties of v404 lyr exhibiting eclipse timing variations and multiperiodic pulsations from all historical data including the and superwasp observations . detailed analyses of 2,922 minimum epochs showed that the orbital period has varied through a combination with an upward - opening parabola... |
astro-ph0604495 | r | figures [ fig:08sep03 ] through [ fig : hbc684 ] present the high - resolution spectra that will be discussed further in 4 . absorption and emission lines were identified using atlases of the solar spectrum and sunspot umbral spectrum in the near - infrared @xcite . @xmath2-band line identifications are from table ... | high - resolution-band spectra were also obtained for most of the sample objects . spectral types and rotational velocities are determined for all objects in the sample . many of the spectra reveal hydrogen emission lines typical of strong accretion processes , indicating that most of these objects harbor circumstellar... | we present the properties of a group of young stars associated with the well - studied t tauri star system as 353 , located in the aquila star - forming region . the association is identified using radial velocity measurements of sample objects selected from the herbig and bell catalog based on their spatial proximit... |
astro-ph0604495 | c | to determine the general circumstellar properties of the sample we plot @xmath27 versus @xmath28 colors from the _ 2mass _ photometry ( figure [ fig : ccd ] ) . five of the objects have infrared excess according to this analysis , consistent with the same five objects that have ew(h@xmath7 ) @xmath8 10 ( table [... | eight of the nine objects have radial velocities that are consistent within the 1- scatter of the sample . from their mean of km s these eight objects have a standard deviation of 2 km s , which suggests that the sample stars are related . the overall multiplicity of the sample is high ; we observed 13 stars in sev... | we present the properties of a group of young stars associated with the well - studied t tauri star system as 353 , located in the aquila star - forming region . the association is identified using radial velocity measurements of sample objects selected from the herbig and bell catalog based on their spatial proximit... |
astro-ph0604495 | c | this paper presents the results of multi - epoch observations of a sample of nine young , late - type stars in the aquila star - forming region . sample objects were selected from @xcite based on their proximity to as 353a and classification as a wtts or ctts . the high - resolution ( r@xmath030,000 ) @xmath1-and @xma... | we present the properties of a group of young stars associated with the well - studied t tauri star system as 353 , located in the aquila star - forming region . the multi - epoch-band spectra were examined for radial velocity variations in order to detect possible spectroscopic binaries . this work represents the hi... | we present the properties of a group of young stars associated with the well - studied t tauri star system as 353 , located in the aquila star - forming region . the association is identified using radial velocity measurements of sample objects selected from the herbig and bell catalog based on their spatial proximit... |
1408.5940 | i | the accretion of matter onto a forming star is inextricably associated with mass outflow . this manifests itself as well - collimated jets typically observed in higher excitation shock - excited forbidden lines such as [ sii ] or [ feii ] , or lower excitation emission of shock - exited h@xmath1 . larger - scale and ol... | we present the results of keck telescope laser adaptive optics integral field spectroscopy with osiris of the innermost regions of the ngc 1333 svs 13 outflow that forms the system of herbig - haro objects 7 - 11 . we postulate that the creation of a series of bubbles and the changes in outflow direction are indicati... | we present the results of keck telescope laser adaptive optics integral field spectroscopy with osiris of the innermost regions of the ngc 1333 svs 13 outflow that forms the system of herbig - haro objects 7 - 11 . we find a bright 0 long microjet traced by the emission of shock - excited [ feii ] . beyond the extent... |
1408.5940 | r | figure 1 shows the h@xmath1 shock - excited line emission associated with svs 13 on four different spatial scales : the top image is an archival spitzer space telescope infrared array camera ( irac ) @xcite channel 2 ( 4.5 @xmath4 m ) image covering most of the outflow emission . the second panel is a small cutout fr... | there is clear indication that prior bubble ejections were pointed in different directions . within these variations , a clear connection of the newly observed bubble ejection events to the well - known , poorly collimated hh 7 - 11 system of herbig - haro objects is established . astrometry of the youngest of the expa... | we present the results of keck telescope laser adaptive optics integral field spectroscopy with osiris of the innermost regions of the ngc 1333 svs 13 outflow that forms the system of herbig - haro objects 7 - 11 . we find a bright 0 long microjet traced by the emission of shock - excited [ feii ] . beyond the extent... |
1408.5940 | c | we have presented adaptive optics corrected integral field spectroscopy of the young outflow source svs 13 in ngc 1333 . the h@xmath1 10 s(1 ) line at 2.122 @xmath4 m , indicating low - velocity shocks , the higher excitation [ feii ] line of the micro - jet at 1.644 @xmath4 m , and atomic hydrogen emission in the hi... | , we find a series of bubbles and fragments of bubbles that are traced in the lower excitation h 10 s(1 ) line . while the most recent outflow activity is directed almost precisely ( pa 145 ) to the south - east of svs 13 , | we present the results of keck telescope laser adaptive optics integral field spectroscopy with osiris of the innermost regions of the ngc 1333 svs 13 outflow that forms the system of herbig - haro objects 7 - 11 . we find a bright 0 long microjet traced by the emission of shock - excited [ feii ] . beyond the extent... |
astro-ph9809366 | i | recent analyses of extended rotation curves ( rcs ) of late - type spiral galaxies ( persic , salucci & stel 1996 ) have confirmed that in spirals of all luminosities a substantial dark matter ( dm ) component is detectable already in the optical region . the effect is stronger at lower luminosities : the dark - to - v... | we present the stellar and ionized - gas velocity curves and velocity - dispersion profiles along the major axis for six early - type spiral galaxies . lllllllllllllc & & & & & & & & & & & & + & & & & & & & & & & & & & + & & & & & & & & & & & & & + ngc 2179&sa & .sas0 .. col.(6 ) : inclination from rubin et al . ( ... | we present the stellar and ionized - gas velocity curves and velocity - dispersion profiles along the major axis for six early - type spiral galaxies . two of these galaxies , namely ngc 2179 and ngc 2775 , are particularly suited for the study of dark matter halos . using their luminosity profiles and modeling th... |
astro-ph9809366 | c | we have presented the ionized - gas and stellar kinematics , measured along the major axis , for a sample of six early - type spiral galaxies . ( due to the high values of @xmath32 in their inner regions , the gas rcs can not be used as circular - velocity curves . ) for ngc 2179 and ngc 2775 , we have modeled bot... | two of these galaxies , namely ngc 2179 and ngc 2775 , are particularly suited for the study of dark matter halos . using their luminosity profiles and modeling their stellar and gaseous kinematics , we derive the mass contributions of the luminous and the dark matter to the total potential . in ngc 2179 we find tha... | we present the stellar and ionized - gas velocity curves and velocity - dispersion profiles along the major axis for six early - type spiral galaxies . two of these galaxies , namely ngc 2179 and ngc 2775 , are particularly suited for the study of dark matter halos . using their luminosity profiles and modeling th... |
0910.3001 | i | the issue of accretion as the power source behind active galactic nuclei ( agns ) was decided as early as 1969 @xcite . since then , a 40-year effort to unravel the physics underlying this process has produced a great body of observational and theoretical work covering a host of the agn properties and phenomena . howev... | based on earlier observational clues and theoretical arguments , we focus our attention on a subset of these winds , namely those with radial density dependence ( is the spherical radial coordinate ) . we employ the photoionization code ` xstar ` to compute the ionic abundances of a large number of ions of different el... | we present the two - dimensional ( 2d ) ionization structure of self - similar magnetohydrodynamic ( mhd ) winds off accretion disks around irradiated by a central x - ray point source . based on earlier observational clues and theoretical arguments , we focus our attention on a subset of these winds , namely those wit... |
0910.3001 | i | in this work we have presented a detailed study of the ionization structure of model mhd winds off accretion disks ; this is our first attempt to model within this context the recent observations of absorption features in the _ asca , xmm _ and _ chandra _ x - ray spectra , the so - called warm absorbers . to this end ... | we present the two - dimensional ( 2d ) ionization structure of self - similar magnetohydrodynamic ( mhd ) winds off accretion disks around irradiated by a central x - ray point source . we focus our attention on the distribution of the column density of the various ions as a function of the ionization parameter ( or e... | we present the two - dimensional ( 2d ) ionization structure of self - similar magnetohydrodynamic ( mhd ) winds off accretion disks around irradiated by a central x - ray point source . based on earlier observational clues and theoretical arguments , we focus our attention on a subset of these winds , namely those wit... |
1602.06030 | i | consider a non - linear , non - gaussian state space model for an observed sequence @xmath0 . this model , with parameters @xmath1 , assumes that the @xmath2 are drawn from an observation density @xmath3 , where @xmath4 is an unobserved markov process with initial density @xmath5 and transition density @xmath6 . here ,... | this new scheme allows the embedded hmm method to be used for efficient sampling in state space models where the state can be high - dimensional . previously , embedded hmm methods were only applied to models with a one - dimensional state space . we demonstrate that using our proposed pool state selection scheme , an ... | we propose a new scheme for selecting pool states for the embedded hidden markov model ( hmm ) markov chain monte carlo ( mcmc ) method . this new scheme allows the embedded hmm method to be used for efficient sampling in state space models where the state can be high - dimensional . previously , embedded hmm methods w... |
1407.7679 | i | traditionally , thermodynamics is a theory that describes systems exchanging energy and entropy with idealized heat reservoirs and work sources . it provides two fundamental laws every system must obey : the first law ( energy balance ) and the second law ( entropy increase ) . reconciling these macroscopic laws with a... | the model is exactly solvable and we show that it can be equivalently interpreted as a brownian ratchet demon . we then consider a measurement based discrete feedback scheme , which produces identical system dynamics , but possesses a different second law inequality . we show that the second law for discrete feedback c... | we propose a physically realizable maxwell s demon device using a spin valve interacting unitarily for a short time with electrons placed on a tape of quantum dots , which is thermodynamically equivalent to the device introduced by mandal and jarzynski [ pnas * 109 * , 11641 ( 2012 ) ] . the model is exactly solvable a... |
0912.1072 | i | the classical de finetti theorem states that an exchangeable sequence of real random variables is a mixture of independent and identically distributed ( i.i.d . ) sequences of random variables . moreover , there is an ( almost surely unique ) measure - valued random variable , called the _ directing random measure _ ... | we prove a uniformly computable version of de finetti s theorem on exchangeable sequences of real random variables . as a consequence , exchangeable stochastic processes in probabilistic functional programming languages can be automatically rewritten as procedures that do not modify non - local state . along the way ,... | we prove a uniformly computable version of de finetti s theorem on exchangeable sequences of real random variables . as a consequence , exchangeable stochastic processes in probabilistic functional programming languages can be automatically rewritten as procedures that do not modify non - local state . along the way ,... |
math0403376 | i | the present paper is concerned with the floer homology groups @xmath0 of a compact symplectic manifold @xmath1 with contact type boundary , as well as with their cohomological dual analogues @xmath2 . the latter were defined by viterbo in @xcite and are invariants that take into account the topology of the underlying m... | we prove the knneth formula in floer ( co)homology for manifolds with restricted contact type boundary . we use viterbo s definition of floer homology , involving the symplectic completion by adding a positive cone over the boundary . the knneth formula implies the vanishing of floer ( co)homology for subcritical stein... | we prove the knneth formula in floer ( co)homology for manifolds with restricted contact type boundary . we use viterbo s definition of floer homology , involving the symplectic completion by adding a positive cone over the boundary . the knneth formula implies the vanishing of floer ( co)homology for subcritical stein... |
math0009179 | r | assume that all intervals under consideration are closed . a multimodal map @xmath2 is renormalizable with respect to a critical point @xmath3 if there exist @xmath24 and an interval @xmath25 such that @xmath26 have disjoint interiors and @xmath27 . the smallest @xmath28 with this property is the period of the renormal... | we proved the so called complex bounds for multimodal , infinitely renormalizable analytic maps with bounded combinatorics : deep renormalizations have polynomial - like extensions with definite modulus . the complex bounds is the first step to extend the renormalization theory of unimodal maps to multimodal maps . | we proved the so called complex bounds for multimodal , infinitely renormalizable analytic maps with bounded combinatorics : deep renormalizations have polynomial - like extensions with definite modulus . the complex bounds is the first step to extend the renormalization theory of unimodal maps to multimodal maps . ... |
0909.0005 | i | the ads / cft correspondence @xcite provides a unique window into the dynamics of a class of strongly coupled gauge field theories . for large @xmath0 gauge theories , the dynamics in the planar limit is expected to be effectively classical , with @xmath1 controlling the quantum corrections . for a class of superconfor... | we recently argued that the dynamics of strongly coupled field theories in black hole backgrounds is related via the ads / cft correspondence to two new classes of ads black hole solutions : black funnels , and black droplets suspended above a second disconnected horizon . we continue our investigation of these solutio... | we recently argued that the dynamics of strongly coupled field theories in black hole backgrounds is related via the ads / cft correspondence to two new classes of ads black hole solutions : black funnels , and black droplets suspended above a second disconnected horizon . the funnel solutions are dual to black holes c... |
astro-ph9606106 | r | as mentioned earlier we have carried out simulations with two initial magnetic field geometries ; namely a field transverse to the motion of the bullet ( henceforth identified as `` t '' models ) and parallel or aligned with the bullet motion ( henceforth identified as `` a '' models ) . table [ tbl-1 ] characterizes ... | similar effects cause the magnetic field within the bullet itself to be reduced below its initial value over time . for oblique fields , we expect that the transverse field cases modeled here are more generally relevant . what counts is whether field lines threading the face of the bullet are swept around it in a fa... | we report an extensive set of two - dimensional mhd simulations exploring the role and evolution of magnetic fields in the dynamics of supersonic plasma clumps . we examine the influence of both ambient field strength and orientation on the problem . of those two characteristics , field orientation is far more importan... |
astro-ph9606106 | i | we have carried out an extensive set of two - dimensional mhd simulations exploring the role of magnetic field in the dynamics of supersonic clumps of plasma . we have examined the influence of both field strength and orientation on the problem . of those two characteristics field orientation is far more important . ev... | we report an extensive set of two - dimensional mhd simulations exploring the role and evolution of magnetic fields in the dynamics of supersonic plasma clumps . we examine the influence of both ambient field strength and orientation on the problem . of those two characteristics , when the ambient magnetic field is tra... | we report an extensive set of two - dimensional mhd simulations exploring the role and evolution of magnetic fields in the dynamics of supersonic plasma clumps . we examine the influence of both ambient field strength and orientation on the problem . of those two characteristics , field orientation is far more importan... |
1204.4706 | i | observations of the far - ir / submillimeter background with _ cobe _ demonstrated that a substantial fraction of the universe s star formation took place behind a veil of dust @xcite . because these were integrated measurements , however , they could not identify which populations of dust - obscured galaxies contained... | we report measurements of the carbon monoxide ground state rotational transition (co ) with the zpectrometer ultra - wideband spectrometer on the 100 m diameter green bank telescope . herschel_-atlas photometric colors from the spire instrument . the co detections confirm the existence of massive gas reservoirs within ... | we report measurements of the carbon monoxide ground state rotational transition (co ) with the zpectrometer ultra - wideband spectrometer on the 100 m diameter green bank telescope . the sample comprises 11 galaxies with redshifts between and 3.5 from a total sample of 24 targets identified by _ herschel_-atlas photom... |
1204.4706 | r | panels in figure [ fig : spectra ] show the spectra and confidence plots for all of the source pairs we observed . the upper panel for each source pair is the spectrum across the zpectrometer band . vertical dashed lines mark line frequencies of detected galaxies . the lower panel shows the detection probabilities @xm... | the sample comprises 11 galaxies with redshifts between and 3.5 from a total sample of 24 targets identified by _ nine of the co measurements are new redshift determinations , substantially adding to the number of detections of galaxies with rest - frame peak submillimeter emission near 100 m . the co redshift distribu... | we report measurements of the carbon monoxide ground state rotational transition (co ) with the zpectrometer ultra - wideband spectrometer on the 100 m diameter green bank telescope . the sample comprises 11 galaxies with redshifts between and 3.5 from a total sample of 24 targets identified by _ herschel_-atlas photom... |
1102.2880 | i | this paper concerns the computational complexity of an optimisation problem with strong connections to the _ constraint satisfaction problem _ ( csp ) . an instance of the constraint satisfaction problem consists of a finite set of variables , a set of values ( the domain ) , and a finite set of constraints . the goal ... | we report new results on the complexity of the valued constraint satisfaction problem ( vcsp ) . under the unique games conjecture , the approximability of finite - valued vcsp is fairly well - understood . however , there is yet no characterisation of vcsps that can be solved exactly in polynomial time . this is unsat... | we report new results on the complexity of the valued constraint satisfaction problem ( vcsp ) . under the unique games conjecture , the approximability of finite - valued vcsp is fairly well - understood . however , there is yet no characterisation of vcsps that can be solved exactly in polynomial time . this is unsat... |
astro-ph0510629 | c | this paper contains the first spectroscopic variability study for young accreting brown dwarfs . we obtained , depending on the target , 4 - 13 high - resolution spectra using the magellan / clay 6.5 m telescope , covering timescales from a few hours to several weeks . our targets are six sub - stellar objects in nearb... | high - resolution optical spectra of six targets in nearby star - forming regions were obtained over 11 nights between 2005 january - march on the magellan 6.5 m telescope . the most dramatic changes are seen for 2mass j1207334 - 393254 ( 2m1207 ) , 2mass j11013205 - 7718249 ( 2m1101 ) and chai - iso217 . we also see i... | we report on the first dedicated monitoring campaign of spectroscopic variability in young brown dwarfs . high - resolution optical spectra of six targets in nearby star - forming regions were obtained over 11 nights between 2005 january - march on the magellan 6.5 m telescope . we find significant variability in h and... |
astro-ph0205305 | r | the variability results for our sample are presented in table [ tab - sv ] . included are the total number of nights each object was observed and the number of nights in the final data set , the number of good images used in the analysis and the total taken , the number of days the data sets cover ( t@xmath40 ) , the ... | the periods found for 2mass 0746 + 20ab and 2mass 1300 + 19 are unique but longer than those periods likely from rotation velocity measurements and they do not represent periodic behavior in the light curve that persists through the entire data set . the remaining variable objects show no prominent features in their li... | we report on the results of an-band photometric variability survey of eighteen l dwarfs . we find that seven exhibit statistically significant variations above the 95.4% confidence level with root - mean - square scatter ( including photometric errors ) between 0.010 and 0.083 mag . another five targets have variabilit... |
astro-ph0205305 | c | we have conducted a photometric monitoring program of eighteen l dwarfs in the @xmath6 photometric filter . we find that seven of these eighteen display statistically significant variations above the 95.4% probability level and with rms scatter between 0.010 and 0.083 mag . an additional five objects have probabilities... | we find that seven exhibit statistically significant variations above the 95.4% confidence level with root - mean - square scatter ( including photometric errors ) between 0.010 and 0.083 mag . another five targets have variability probabilities% , suggesting that these are likely variable objects . the period for 2mas... | we report on the results of an-band photometric variability survey of eighteen l dwarfs . we find that seven exhibit statistically significant variations above the 95.4% confidence level with root - mean - square scatter ( including photometric errors ) between 0.010 and 0.083 mag . another five targets have variabilit... |
1405.4165 | i | we performed a broad - band and narrow - band ( h@xmath1 ) imaging survey of a radio galaxy field ( 4c65.22 ) at @xmath0 over the 7@xmath224@xmath23 fov ( corresponding to 3.6@xmath212.0 mpc@xmath19 ) with moircs / suprime - cam on the subaru telescope . based on this new dataset , we find a rich cluster candidate arou... | we find that h emitters are located in the outskirts of the density peak ( cluster core ) dominated by passive red - sequence galaxies . density or ssfr density relations amongst sf galaxies , and the location of the sf main sequence does not significantly change with environment . nevertheless , we find a tentative h... | we report the discovery of a strong over - density of galaxies in the field of a radio galaxy at ( 4c65.22 ) based on our broad - band and narrow - band ( h ) photometry with subaru telescope . we find that h emitters are located in the outskirts of the density peak ( cluster core ) dominated by passive red - sequence ... |
1409.5810 | i | we have examined the abundance patterns found in stars with high levels of enrichment as indicated by their enhanced [ eu / fe ] ratios . our study differs from the survey of @xcite by deriving abundances from higher - resolution spectra that cover a wider wavelength range . thirteen of the 313 metal - poor stars ana... | we also analyze four previously - known-process - enhanced metal - poor red giants . from this sample of 13 stars , we draw the following conclusions . ( 1 ) high levels of-process enhancement are found in a broad range of stellar evolutionary states , reaffirming that this phenomenon is not associated with a chemical... | we report the discovery of nine metal - poor stars with high levels of-process enhancement (.81 [ eu / fe ] .13 ) , including six subgiants and three stars on the red horizontal branch . we also analyze four previously - known-process - enhanced metal - poor red giants . from this sample of 13 stars , we draw the fo... |
1412.5674 | i | after four years of nearly continuous photometric monitoring and thousands of planet discoveries ( e.g. * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? * ) , the primary _ kepler _ mission came to an end in in may 2013 with the failure of the second of four reaction wheels used to stabilize the spa... | we report the first planet discovery from the two wheeled _ kepler _ ( k2 ) mission : hip116454b . radial velocity observations with the harps - n spectrograph reveal a 1.33 m planet in a 9.1 day orbit , consistent with the transit depth , duration , and ephemeris . follow up photometric measurements from the most... | we report the first planet discovery from the two wheeled _ kepler _ ( k2 ) mission : hip116454b . the host star hip116454 is a bright ( , ) k1dwarf with high proper motion , and a parallax based distance of pc . based on high - resolution optical spectroscopy , we find that the host star is metal - poor with [ fe... |
astro-ph0008467 | r | a low resolution x - ray image , covering all of the radio emitting regions and with selected vla radio contours ( from prm ) overlaid , is shown in fig . 1 , while a full resolution x - ray image of the nucleus and structure to the west of the nucleus is shown in fig . the brightest x - ray source is associated with t... | x - ray emission is detected from the nucleus , a 19 ( 110 kpc ) long jet to the west of the nucleus , the western radio hot spot some 42 ( 240 kpc ) from the nucleus , and the eastern radio lobe . the x - ray jet coincides with a weak radio jet and is laterally extended by 20 ( 1.9 kpc ) . | we report x - ray observations of the nearby , powerful radio galaxy pictor a with the chandra observatory and optical and near uv observations of its western radio hot spot with the hubble space telescope . x - ray emission is detected from the nucleus , a 19 ( 110 kpc ) long jet to the west of the nucleus , the weste... |
astro-ph0008467 | c | the projected distance , d@xmath56 , of the w radio hot spot of pictor a from the nucleus is larger than that , d@xmath55 , of the e radio hot spots . this observation is consistent with the w radio lobe being the nearer one , since the extra light travel time to the more distant lobe implies that it is seen at an earl... | the x - ray spectrum of the hot spot is well described by an absorbed power law with photon index = 2.07 0.11 . the observed jet is up to 15 times brighter in x - rays than any counter jet , a difference ascribed to relativistic boosting as the western radio lobe is probably the closer . the jet s spectrum is well mode... | we report x - ray observations of the nearby , powerful radio galaxy pictor a with the chandra observatory and optical and near uv observations of its western radio hot spot with the hubble space telescope . x - ray emission is detected from the nucleus , a 19 ( 110 kpc ) long jet to the west of the nucleus , the weste... |
astro-ph0008467 | c | our chandra study of pictor a has shown that the x - ray emissions from the jet and the western hot spot are non - thermal . the spectra of both are well described by an absorbed power law with ( flux density ) spectral index @xmath13 @xmath2 1.0 . the x - ray spectrum of the hot spot is not a smooth extension of the r... | we report x - ray observations of the nearby , powerful radio galaxy pictor a with the chandra observatory and optical and near uv observations of its western radio hot spot with the hubble space telescope . thermal models for the hot spot s x - ray emission are ruled out . synchrotron self - compton models involving s... | we report x - ray observations of the nearby , powerful radio galaxy pictor a with the chandra observatory and optical and near uv observations of its western radio hot spot with the hubble space telescope . x - ray emission is detected from the nucleus , a 19 ( 110 kpc ) long jet to the west of the nucleus , the weste... |
1610.05850 | i | the mixed formulation allows us to calculate simultaneously the primary solution of a pde and its flux . for this reason , mixed formulations are very useful for numerical solution of multiphysics systems . the focus of this work is on a single diffusive process that is a part of almost any complex multiphysics system ... | we review basic design principles underpinning the construction of mimetic finite difference and a few finite volume and finite element schemes for mixed formulations of elliptic problems . for a class of low - order mixed - hybrid schemes , we show connections between these principles and prove that the consistency an... | we review basic design principles underpinning the construction of mimetic finite difference and a few finite volume and finite element schemes for mixed formulations of elliptic problems . for a class of low - order mixed - hybrid schemes , we show connections between these principles and prove that the consistency an... |
1011.0732 | i | inhomogeneities in the large - scale matter distribution can in many ways affect the light signals coming from very distant objects . these effects need to be understood well if we want to map the expansion history and determine the composition of the universe to a high precision from cosmolgical observations . in part... | we revise and extend the stochastic approach to cumulative weak lensing ( hereafter the sgl method ) first introduced in ref . . here we include a realistic halo mass function and density profiles to model the distribution of mass between and within galaxies , galaxy groups and galaxy clusters . we show that the sgl ... | we revise and extend the stochastic approach to cumulative weak lensing ( hereafter the sgl method ) first introduced in ref . . here we include a realistic halo mass function and density profiles to model the distribution of mass between and within galaxies , galaxy groups and galaxy clusters . we also introduce a m... |
1206.5830 | i | it has been established that a strong link exists between supermassive black holes ( smbhs ) and the galaxies in which they live @xcite and between accreting smbhs ( or active galactic nuclei , agn ) and star formation in particular ( e.g. * ? ? ? * ; * ? ? ? clues to this link can be revealed by detailed analysis of t... | we study a combined sample of 264 star - forming , 51 composite , and 73 active galaxies using optical spectra from sdss and mid - infrared ( mid - ir ) spectra from the spitzer infrared spectrograph . misclassifications of galaxies based on the sdss spectra are rare despite the presence of dust obscuration . the lumin... | we study a combined sample of 264 star - forming , 51 composite , and 73 active galaxies using optical spectra from sdss and mid - infrared ( mid - ir ) spectra from the spitzer infrared spectrograph . we examine optical and mid - ir spectroscopic diagnostics that probe the amount of star formation and relative energet... |
1206.5830 | c | we have explored the infrared and optical parameter space where star - forming galaxies , composites and agn live to analyze diagnostics that parameterize host galaxy star formation . using star - forming galaxies as a control sample , we have investigated which star formation diagnostics are least affected by agn acti... | we examine optical and mid - ir spectroscopic diagnostics that probe the amount of star formation and relative energetic contributions from star formation and an active galactic nucleus ( agn ) . overall we find good agreement between optical and mid - ir diagnostics . we also consider the behavior of the three individ... | we study a combined sample of 264 star - forming , 51 composite , and 73 active galaxies using optical spectra from sdss and mid - infrared ( mid - ir ) spectra from the spitzer infrared spectrograph . we examine optical and mid - ir spectroscopic diagnostics that probe the amount of star formation and relative energet... |
1003.0366 | i | quantum brownian motion ( qbm ) of a particle or charge in a tilted periodic potential is one of the basic subjects of nonequilibrium quantum - statistical mechanics and a key model for a multitude of quantum transport phenomena in condensed matter @xcite . of particular interest is a duality symmetry between the weak-... | they have calculated the perturbative series of twisted partition functions , which require particular ( unphysical ) imaginary values of the bias , by applying the tools of jack symmetric functions to the `` log - sine '' coulomb gas on a circle . we have analyzed the conjectured relation between the analytically cont... | we study a conjecture by fendley , ludwig and saleur for the nonlinear conductance in the boundary sine - gordon model . they have calculated the perturbative series of twisted partition functions , which require particular ( unphysical ) imaginary values of the bias , by applying the tools of jack symmetric functions ... |
1206.2656 | i | classical ldpc codes , it hardly needs to be recalled , come together with very efficient and fast decoding algorithms and overall display extremely good performance for a variety of channels . quantum error - correcting codes on the other hand , under the guise of the css @xcite scheme , are in some ways strikingly si... | we study a construction of quantum ldpc codes proposed by mackay , mitchison and shokrollahi . it is based on the cayley graph of together with a set of generators regarded as the columns of the parity check matrix of a classical code . * msc : * 94c15 , 05c99 , 94b99 * key words : * quantum codes , ldpc codes , ca... | we study a construction of quantum ldpc codes proposed by mackay , mitchison and shokrollahi . it is based on the cayley graph of together with a set of generators regarded as the columns of the parity check matrix of a classical code . we give a general lower bound on the minimum distance of the quantum code in where... |
nucl-th9709062 | i | there exist many nucleon - nucleon potentials which reproduce phase shifts and nuclear properties with remarkable accuracy @xcite . three fundamental features are shared by these potential models : ( i ) pions dominate at long distances , ( ii ) there is some source of intermediate - range attraction , and ( iii ) the... | the potential is conjectured to be the sum of a delta function and its derivatives . regularizing the lippmann - schwinger equation using a cutoff we find that the cutoff can be taken to infinity only if the effective range is negative . comparison of cutoff schemes and dimensional regularization reveals that the physi... | we study an effective field theory of interacting nucleons at distances much greater than the pion s compton wavelength . in this regime the potential is conjectured to be the sum of a delta function and its derivatives . the question we address is whether this sum can be consistently truncated at a given order in the ... |
nucl-th9709062 | c | our results are discouraging for any effective field theory description of @xmath0 scattering in which low - lying bound states are not included as explicit degrees of freedom . these low - energy bound and quasi - bound states exist in nuclear physics , and so , if efts in which they are not explicitly included are to... | the question we address is whether this sum can be consistently truncated at a given order in the derivative expansion , and systematically improved by going to higher orders . a positive effective range which occurs in nature requires that the cutoff be kept finite and below the scale of the physics which has been i... | we study an effective field theory of interacting nucleons at distances much greater than the pion s compton wavelength . in this regime the potential is conjectured to be the sum of a delta function and its derivatives . the question we address is whether this sum can be consistently truncated at a given order in the ... |
1203.4063 | i | _ coefficient extraction _ can be seen as a general method for designing algorithms , recently in particular in the area of exact algorithms for various np - hard problems @xcite ( cf . @xcite for an introduction to exact algorithms ) . the approach of the method is the following ( see also @xcite ) : 1 . define a ... | we study classes of dynamic programming ( dp ) algorithms which , due to their algebraic definitions , are closely related to coefficient extraction methods . dp algorithms can easily be modified to exploit sparseness in the dp table through memorization . coefficient extraction techniques on the other hand are both sp... | we study classes of dynamic programming ( dp ) algorithms which , due to their algebraic definitions , are closely related to coefficient extraction methods . dp algorithms can easily be modified to exploit sparseness in the dp table through memorization . coefficient extraction techniques on the other hand are both sp... |
1508.07055 | i | one of the most intriguing theoretical results in quantum field theory ( qft henceforth ) has been the realization that fermions can emerge out of purely bosonic lagrangians as solitonic excitations ( for a detailed review see @xcite ) . the clearest demonstration that the importance of this result goes far beyond pure... | we study multi - soliton solutions of the four - dimensional su(n ) skyrme model by combining the hedgehog ansatz for su(n ) based on the harmonic maps of into and a geometrical trick which allows to analyze explicitly finite - volume effects without breaking the relevant symmetries of the ansatz . the geometric set - ... | we study multi - soliton solutions of the four - dimensional su(n ) skyrme model by combining the hedgehog ansatz for su(n ) based on the harmonic maps of into and a geometrical trick which allows to analyze explicitly finite - volume effects without breaking the relevant symmetries of the ansatz . the geometric set - ... |
cond-mat9901267 | i | the dynamics of systems close to a glass transition remains a central problem in statistical physics @xcite . because the glass transition is a many - body phenomenon , models for it invariably involve some approximation and it is important to disentangle the physical phenomena from the approximation scheme used . in m... | bouchaud , _ rev . we investigate the breakdown , near the glass transition , of the ( generalized ) stokes - einstein relation between self - diffusion of a tracer particle and the ( frequency - dependent ) viscosity of the system as a whole . we also investigate the effect of flow ( oscillatory shear ) on self - dif... | we study self - diffusion within a simple hopping model for glassy materials . ( the model is bouchaud s model of glasses [ j .- p . bouchaud , _ j. physique i _ * 2 * 1705 ( 1992 ) ] , as extended to describe rheological properties [ p. sollich , f. lequeux , p. hbraud and m.e . cates , _ phys . rev . lett . _ * 78... |
cond-mat9901267 | c | we have studied quantitatively , within a simple hopping model of glassy dynamics , the relation between diffusion and rheological responses ( in the linear response regime ) and ( for the nonlinear regime ) the coupling between these two aspects of the dynamics . in the presence of a broad distribution of relaxatio... | we study self - diffusion within a simple hopping model for glassy materials . j. physique i _ * 2 * 1705 ( 1992 ) ] , as extended to describe rheological properties [ p. sollich , f. lequeux , p. hbraud and m.e . this stems from the presence of a broad distribution of relaxation times of which different moments contro... | we study self - diffusion within a simple hopping model for glassy materials . ( the model is bouchaud s model of glasses [ j .- p . bouchaud , _ j. physique i _ * 2 * 1705 ( 1992 ) ] , as extended to describe rheological properties [ p. sollich , f. lequeux , p. hbraud and m.e . cates , _ phys . rev . lett . _ * 78... |
cond-mat0602288 | i | switching between coexisting stable states underlies many phenomena in physics , from diffusion in solids to protein folding . for classical systems in thermal equilibrium switching is often described by the activation law , with the switching probability being , where @xmath2 is the activation energy . as temperature ... | we study switching between period - two states of an underdamped quantum oscillator modulated at nearly twice its natural frequency . for all temperatures and parameter values switching we find the semiclassical distribution over quasienergy . for , where the system has detailed balance , this distribution differs from... | we study switching between period - two states of an underdamped quantum oscillator modulated at nearly twice its natural frequency . for all temperatures and parameter values switching occurs via quantum activation : it is determined by diffusion over oscillator quasienergy , provided the relaxation rate exceeds the r... |
1702.04705 | i | the goal of this paper is to study symplectic aspects of monodromy map for second order linear equation on a riemann surface of genus @xmath1 with meromorphic potential admitting @xmath2 simple zeros . our results generalize results of the recent paper by m.bertola , c.norton and the author @xcite where the case of hol... | we study symplectic properties of monodromy map of second order linear equation with meromorphic potential having only simple poles on a riemann surface . we show that the canonical symplectic structure on the cotangent bundle implies the goldman poisson structure on the corresponding character variety under monodromy ... | we study symplectic properties of monodromy map of second order linear equation with meromorphic potential having only simple poles on a riemann surface . we show that the canonical symplectic structure on the cotangent bundle implies the goldman poisson structure on the corresponding character variety under monodromy ... |
1508.03038 | i | the theory of hyperplane arrangements has deep connections with many areas of mathematics , such as combinatorics , representation theory , algebraic geometry , algebraic topology , singularity theory , and the theory of hypergeometric functions . one beautiful application of the use of hyperplane arrangements in algeb... | we study the central hyperplane arrangement whose hyperplanes are the vanishing loci of the weights of the first and the second fundamental representations of restricted to the dual fundamental weyl chamber . we obtain generating functions that count flats and faces of a given dimension . this counting is interpreted i... | we study the central hyperplane arrangement whose hyperplanes are the vanishing loci of the weights of the first and the second fundamental representations of restricted to the dual fundamental weyl chamber . we obtain generating functions that count flats and faces of a given dimension . this counting is interpreted i... |
1002.0732 | i | we propose a continuous model of the elasticity and plasticity of disordered , discrete materials such as cellular patterns ( for instance liquid foams or emulsions ) and assemblies of particles ( for instance colloids ) . it is based on statistical quantities including ( i ) the elastic strain @xmath35 , a dimensionle... | we study the elasto - plastic behaviour of materials made of individual ( discrete ) objects , such as a liquid foam made of bubbles . the evolution of positions and mutual arrangements of individual objects is taken into account through statistical quantities , such as the elastic strain of the structure , the yield s... | we study the elasto - plastic behaviour of materials made of individual ( discrete ) objects , such as a liquid foam made of bubbles . the evolution of positions and mutual arrangements of individual objects is taken into account through statistical quantities , such as the elastic strain of the structure , the yield s... |
0910.5858 | c | we have studied the entanglement creation process of two uniformly accelerated ud detectors moving in opposite directions in the minkowski vacuum of a massless scalar field . the two detectors are causally disconnected during the whole history and are far apart at late times . for two detectors initially in their gr... | we study the full entanglement dynamics of two uniformly accelerated unruh - dewitt detectors with no direct interaction in between but each coupled to a common quantum field and moving back - to - back in the field vacuum . for two detectors initially prepared in a separable state our exact results show that quantum e... | we study the full entanglement dynamics of two uniformly accelerated unruh - dewitt detectors with no direct interaction in between but each coupled to a common quantum field and moving back - to - back in the field vacuum . for two detectors initially prepared in a separable state our exact results show that quantum e... |
0811.0388 | i | quantum phase transitions in systems of itinerant fermions continue to attract considerable interest.@xcite on one hand this attention is due to the relevance of quantum critical points for understanding collective phenomena like high-@xmath1 superconductivity and other non - conventional properties of experimentally i... | we study the impact of quantum and thermal fluctuations on properties of quantum phase transitions occurring in systems of itinerant fermions with main focus on the order of these transitions . our approach is based on a set of flow equations derived within the functional renormalization group framework , in which the ... | we study the impact of quantum and thermal fluctuations on properties of quantum phase transitions occurring in systems of itinerant fermions with main focus on the order of these transitions . our approach is based on a set of flow equations derived within the functional renormalization group framework , in which the ... |
1406.7277 | i | the standard model of cosmology , @xmath4cdm , explains anisotropies on cosmic microwave background ( cmb ) radiation @xcite and the large scale structure ( lss ) observations with good accuracies @xcite . this model is based on the assumption of cold dark matter as the skeleton of the structures in the universe @xcite... | we study the predictions of anomalous inflationary models on the abundance of structures in large scale structure observations . models with localized feature can alleviate the tension between observations and numerical simulations of cold dark matter structures on galactic scales as a possible solution to the missing ... | we study the predictions of anomalous inflationary models on the abundance of structures in large scale structure observations . the anomalous features encoded in primordial curvature perturbation power spectrum are ( a ) : localized feature in momentum space , ( b ) : hemispherical asymmetry and ( c ) : statistical an... |
0809.4035 | i | one of the primary goals of modern condensed matter physics is the characterization of strongly correlated quantum systems . a large class of such materials is represented by frustrated antiferromagnets , which are believed to exhibit a variety of novel states of matter at sufficiently strong coupling . growing experim... | we study the quantum phase diagram and excitation spectrum of the frustrated- spin-1/2 heisenberg hamiltonian . a hierarchical mean - field approach , at the heart of which lies the idea of identifying _ relevant _ degrees of freedom , is developed . thus , by performing educated , manifestly symmetry preserving mean -... | we study the quantum phase diagram and excitation spectrum of the frustrated- spin-1/2 heisenberg hamiltonian . a hierarchical mean - field approach , at the heart of which lies the idea of identifying _ relevant _ degrees of freedom , is developed . thus , by performing educated , manifestly symmetry preserving mean -... |
1211.4465 | i | the concept of ergodicity is at the core of classical statistical mechanics : it establishes a connection between long - time averages of observables and statistical ensemble averages @xcite . the extension of the ergodic theorem to quantum mechanics was pioneered by von neumann @xcite in a seminal paper on the unitar... | [ phys . rev . lett . 109 , 247205 ( 2012 ) ] . with analytical and numerical arguments we present results on two one - dimensional ( 1d ) models , the disordered 1d fermionic chain with long - range hopping and the disordered ising/ spin chain . we analytically prove that , while time averages of one - body operators ... | we study the unitary dynamics and the thermalization properties of free - fermion - like hamiltonians after a sudden quantum quench , extending the results of s. ziraldo _ et al . _ [ phys . rev . lett . 109 , 247205 ( 2012 ) ] . with analytical and numerical arguments , we show that the existence of a stationary state... |
math0510615 | i | in this paper we will study properties of the _ sparse _ or @xmath0-discriminant . given a configuration @xmath1 of @xmath2 points in @xmath3 we may construct an ideal @xmath4 $ ] and , if @xmath5 is homogeneous , a projective toric variety @xmath6 . the dual variety @xmath7 is , by definition , the zariski closure of ... | we study the-discriminant of toric varieties . we reduce its computation to the case of irreducible configurations and describe its behavior under specialization of some of the variables to zero . we give characterizations of dual defect toric varieties in terms of their gale dual and classify dual defect toric varieti... | we study the-discriminant of toric varieties . we reduce its computation to the case of irreducible configurations and describe its behavior under specialization of some of the variables to zero . we give characterizations of dual defect toric varieties in terms of their gale dual and classify dual defect toric varieti... |
1311.4209 | i | the newtonian @xmath2-body problem studies the motion of @xmath2 point masses moving in the euclidean space , under the influence of their mutual gravitational attraction . the motion is determined by the system of differential equations : @xmath3 where @xmath4 and @xmath5 represent the position and the mass of the i -... | we study three sub - problems of the-body problem that have two degrees of freedom , namely thepyramidal problem , the planar double - polygon problem , and the spatial double - polygon problem . we prove the existence of several families of symmetric periodic orbits , including schubart - like " orbits and brake orbi... | we study three sub - problems of the-body problem that have two degrees of freedom , namely thepyramidal problem , the planar double - polygon problem , and the spatial double - polygon problem . we prove the existence of several families of symmetric periodic orbits , including schubart - like " orbits and brake orbi... |
1510.06686 | i | there are many lattice models of a single polymer in solution that take account of different physical scenarios and capture different aspects of such a system , for example by modelling the inclusion of hydrogen bonding or stiffness . the first ingredient in these models is the type of lattice path that is considered .... | we study via monte carlo simulation a generalisation of the so - called vertex interacting self - avoiding walk ( visaw ) model on the square lattice . the configurations are actually not self - avoiding walks but rather restricted self - avoiding trails ( bond avoiding paths ) which may visit a site of the lattice twi... | we study via monte carlo simulation a generalisation of the so - called vertex interacting self - avoiding walk ( visaw ) model on the square lattice . the configurations are actually not self - avoiding walks but rather restricted self - avoiding trails ( bond avoiding paths ) which may visit a site of the lattice twi... |
1410.0338 | c | in this paper we have reconstructed the null - test , that can be used to probe potential deviations from and was first presented in ref . @xcite , by using the @xmath0 , snia and 8 data . we performed the reconstruction in two different ways : by directly binning the data and by fitting the data to various dark energy... | we perform the reconstruction in two different ways , either by directly binning the data or by fitting various dark energy models . we also examine how well the null - test can be reconstructed by future data by creating mock catalogs based on the cosmological constant model , a model with strong dark energy perturbat... | we systematically study the null - test for the growth rate data first presented in and we reconstruct it using various combinations of data sets , such as the 8 and or type ia supernovae ( snia ) data . we perform the reconstruction in two different ways , either by directly binning the data or by fitting various dark... |
astro-ph0504172 | r | in section [ section : results : cross ] , we quantify the amplitude of the dla - galaxy cross - correlation relative to the galaxy - galaxy autocorrelation in the sph simulations . we show how to invert the cross - correlation results into a mass constraint in section [ section : converttomass ] . we show that this ... | , we focus on dlas . we demonstrate that the cross - correlation method robustly constrains the mean dla halo mass using smoothed particle hydrodynamics ( sph ) cosmological simulations that resolve dlas and galaxies in halos of mass . direct measurement of these correlation functions from the simulations yields , in e... | we test the reliability of a method to measure the mean halo mass of absorption line systems such as damped absorbers ( dlas ) . the method is based on measuring the ratio of the cross - correlation between dlas and galaxies to the autocorrelation of the galaxies themselves , which is ( in linear theory ) the ratio of... |
astro-ph0504172 | c | motivated by the fact that ( 1 ) the amplitude of the cross - correlation is a measurement of the mean dla halo mass and ( 2 ) observational constraints ( @xcite @xcite ; assp03 ; bl04 ; j. cooke et al . 2005 , private communication ) are reaching a turning point and the dla halo masses are starting to be constrained ... | the method is based on measuring the ratio of the cross - correlation between dlas and galaxies to the autocorrelation of the galaxies themselves , which is ( in linear theory ) the ratio of their bias factor . equivalently , inverting the measured correlation ratio to infer the ( logarithmically ) averaged dla halo ma... | we test the reliability of a method to measure the mean halo mass of absorption line systems such as damped absorbers ( dlas ) . the method is based on measuring the ratio of the cross - correlation between dlas and galaxies to the autocorrelation of the galaxies themselves , which is ( in linear theory ) the ratio of... |
1510.04697 | c | in this work , we have theoretically proposed a scheme to realize non - trivial topological models in classical systems of coupled pendula or coupled lumped - element rlc circuits through a periodic time - modulation of system parameters . within a floquet framework , we have shown that suitably - designed temporal mod... | we theoretically propose how to observe topological effects in a generic classical system of coupled harmonic oscillators , such as classical pendula or lumped - element electric circuits , whose oscillation frequency is modulated fast in time . making use of floquet theory in the high frequency limit , we identify a r... | we theoretically propose how to observe topological effects in a generic classical system of coupled harmonic oscillators , such as classical pendula or lumped - element electric circuits , whose oscillation frequency is modulated fast in time . making use of floquet theory in the high frequency limit , we identify a r... |
1109.0900 | i | we have analyzed a large set of _ hst _ and ground - based images of the galactic globular cluster ngc 104 ( 47 tuc ) in nine photometric bands , finding multiple sequences throughout the various cmds , from the main sequence all the way to the horizontal branch . exploiting this wealth of _ hst _ data to investigate t... | we calculate theoretical stellar atmospheres for main sequence stars , assuming different chemical composition mixtures , and we compare their predicted colors through the _ hst _ filters with our observed colors . we present evidence that the color - magnitude diagram of 47 tuc consists of intertwined sequences of the... | we use _ hubble space telescope ( hst ) _ and ground - based imaging to study the multiple populations of 47 tuc , combining high - precision photometry with calculations of synthetic spectra . using filters covering a wide range of wavelengths , our _ hst _ photometry splits the main sequence into two branches , and w... |
cond-mat0409039 | i | we have presented both improved and parallel algorithms for the enumeration of self - avoiding polygons and walks on the triangular lattice . these algorithms have enabled us to obtain polygons up to perimeter length 60 , their radius of gyration and area - weighted moments up to perimeter 58 , while for self - avoidin... | walks to length 40 we also calculate series for the metric properties of mean - square end - to - end distance , mean - square radius of gyration and the mean - square distance of a monomer from the end points . for self - avoiding polygons to length 58 we calculate series for the mean - square radius of gyration and t... | we use new algorithms , based on the finite lattice method of series expansion , to extend the enumeration of self - avoiding walks and polygons on the triangular lattice to length 40 and 60 , respectively . for self - avoiding walks to length 40 we also calculate series for the metric properties of mean - square end -... |
astro-ph0512047 | i | variability is observed in the x - ray pwn of psr b1509@xmath058 on time scales possibly as short as one week and up to twelve years . our primary results are as follows : 1 . the compact , small - scale knots appearing within 20@xmath1 of the pulsar exhibit transient behavior which may be attributed to turbulence... | we use new and archival _ chandra _ and _ rosat _ data to study the time variability of the x - ray emission from the pulsar wind nebula ( pwn ) powered by psr b1509 on timescales of one week to twelve years the transient nature of these knots may indicate that they are produced by turbulence in the flows surrounding t... | we use new and archival _ chandra _ and _ rosat _ data to study the time variability of the x - ray emission from the pulsar wind nebula ( pwn ) powered by psr b1509 on timescales of one week to twelve years . there is variability in the size , number , and brightness of compact knots appearing within 20 of the pulsar ... |
0806.0246 | i | great advances in nanotechnology over the past few years led to the fabrication and intense experimental study of low - dimensional electron systems ( quantum dots and wires ) . from a long - term perspective , such systems are of interest as they give insight into the physics of more complicated nanodevices needed for... | we use the matsubara functional renormalization group ( frg ) to describe electronic correlations within the single impurity anderson model . in contrast to standard frg calculations , we account for the frequency - dependence of the two - particle vertex in order to address finite - energy properties ( e.g , spectral ... | we use the matsubara functional renormalization group ( frg ) to describe electronic correlations within the single impurity anderson model . in contrast to standard frg calculations , we account for the frequency - dependence of the two - particle vertex in order to address finite - energy properties ( e.g , spectral ... |
0806.0246 | c | in this paper , we have introduced a truncation scheme for the infinite hierarchy of frg flow equations which accounts for the frequency dependence of the two - particle vertex . the flow equations for the single impurity anderson model were derived explicitly . using a variety of parametrization procedures , we carefu... | the frg approximation is shown to work well for arbitrary parameters ( particularly finite temperatures ) provided that the electron - electron interaction is not too large . we demonstrate that aspects of ( large ) kondo physics which are described well by a simpler frequency - independent truncation scheme are no lon... | we use the matsubara functional renormalization group ( frg ) to describe electronic correlations within the single impurity anderson model . in contrast to standard frg calculations , we account for the frequency - dependence of the two - particle vertex in order to address finite - energy properties ( e.g , spectral ... |
0812.1396 | i | the tunnel leveling theorem of h. goda , m. scharlemann , and a. thompson @xcite says that when a tunnel number one knot is in minimal bridge position , any of its tunnel arcs can be slid to lie in a single horizontal level . using the theory of tunnel number @xmath0 knots developed in @xcite , we will prove the _ tu... | we use the theory of tunnel number knots introduced in to strengthen the tunnel leveling theorem of goda , scharlemann , and thompson . this yields considerable information about bridge numbers of tunnel number knots . in particular , we calculate the minimum bridge number of a knot as a function of the maximum depth i... | we use the theory of tunnel number knots introduced in to strengthen the tunnel leveling theorem of goda , scharlemann , and thompson . this yields considerable information about bridge numbers of tunnel number knots . in particular , we calculate the minimum bridge number of a knot as a function of the maximum depth i... |
1212.2951 | i | hamiltonian eigenvalue problems have a time - honored history , as they arise in numerous applications stemming from fluid mechanics , celestial mechanics , optical and atomic physics among many other disciplines ; see for some recent examples the books @xcite . especially in higher dimensional settings these problems... | when finding the nonzero eigenvalues for hamiltonian eigenvalue problems it is especially important to locate not only the unstable eigenvalues ( i.e. , those with positive real part ) , but also those which are purely imaginary but have negative krein signature in particular , we consider one - dimensional settings ( ... | when finding the nonzero eigenvalues for hamiltonian eigenvalue problems it is especially important to locate not only the unstable eigenvalues ( i.e. , those with positive real part ) , but also those which are purely imaginary but have negative krein signature . these latter eigenvalues have the property that they ca... |
astro-ph0306080 | i | classical novae ( cn ) are the result of unstable thermonuclear ignition of freshly accreted hydrogen and helium on a white dwarf ( wd ) in a mass transferring binary . the orbital periods of these binaries presently range from 1.4 to more than 16 hours , with a large number in the 2 - 4 hour range @xcite . these catac... | , the freshly accumulated hydrogen / helium envelope ignites in a thermally unstable manner that results in a classical novae ( cn ) outburst and ejection of material . these accretion rates are most appropriate to wds in cataclysmic variables ( cvs ) of hr , many of which accrete sporadically as dwarf novae . we have... | white dwarfs experience a thermal renaissance when they receive mass from a stellar companion in a binary . for accretion rates , the freshly accumulated hydrogen / helium envelope ignites in a thermally unstable manner that results in a classical novae ( cn ) outburst and ejection of material . we have undertaken a t... |
1508.01459 | i | we consider relay - assisted device - to - device ( d2d ) communication underlaying lte - a cellular networks where d2d user equipments ( ues ) are served by the relay nodes @xcite . when the link condition between two d2d ues is too poor for direct communication , the d2d traffic can be transmitted via a relay node ,... | wireless device - to - device ( d2d ) communication underlaying cellular network is a promising concept to improve user experience and resource utilization . unlike traditional d2d communication where two mobile devices in the proximity establish a direct local link bypassing the base station , in this work we focus on... | wireless device - to - device ( d2d ) communication underlaying cellular network is a promising concept to improve user experience and resource utilization . unlike traditional d2d communication where two mobile devices in the proximity establish a direct local link bypassing the base station , in this work we focus on... |
1205.1990 | i | observations of diffuse gas have found a population of massive , fast moving clouds . with line - of - sight speeds between @xmath2 km s@xmath3 and @xmath4 km s@xmath3 @xcite , they are appropriately named high velocity clouds ( hvcs ) . these clouds are plentiful ; neutral hvc material covers @xmath5 of the sky @xcite... | with the goal of understanding why x - rays have been reported near some high velocity clouds , we perform detailed 3 dimensional hydrodynamic and magnetohydrodynamic simulations of clouds interacting with environmental gas like that in the galaxy s thick disk / halo or the magellanic stream . the x - ray productivity ... | with the goal of understanding why x - rays have been reported near some high velocity clouds , we perform detailed 3 dimensional hydrodynamic and magnetohydrodynamic simulations of clouds interacting with environmental gas like that in the galaxy s thick disk / halo or the magellanic stream . we examine 2 scenarios . ... |
1205.1990 | r | in order to evaluate the cie approximation , we compare spectra that we calculate from the nei and cie ionization fractions of silicon and oxygen . the nei ionization fractions , i.e. , the fractions of the atoms at any given ionization level were obtained by having flash track the ionization levels in a time dependent... | / s are required . if cooling is quenched , then the shock - heated ambient gas is x - ray emissive , producing bright x - rays in the 1/4 kev band and some x - rays in the 3/4 kev band due to o and other ions . the predicted count rates for the non - radiative case are bright enough to explain the count rate observed... | with the goal of understanding why x - rays have been reported near some high velocity clouds , we perform detailed 3 dimensional hydrodynamic and magnetohydrodynamic simulations of clouds interacting with environmental gas like that in the galaxy s thick disk / halo or the magellanic stream . we examine 2 scenarios . ... |
1207.0181 | i | for investigating the pion - exchange and nucleon fermi - motion effects on the dy process in proton - deuteron(@xmath2 ) reactions , we have derived convolution formula starting with a nuclear model within which the deuteron has @xmath0 and @xmath1 components . the nucleon fermi motion is included by the convolution o... | is expressed in terms of a pion momentum distribution that depends sensitively on the form factor . with a form factor determined by fitting the scattering data up to invariant mass 1.3 gev , we find that the pion - exchange and nucleon fermi - motion effects can change significantly the ratios between the proton - deu... | within a nuclear model that the deuteron has and components , we derive convolution formula for investigating the drell - yan process in proton - deuteron ( ) reactions . the contribution from the component is expressed in terms of a pion momentum distribution that depends sensitively on the form factor . with a form f... |
1212.1486 | i | the power - law temporal decays displayed by the radio , optical , and x - ray fluxes of grb afterglows ( @xmath8 ) have provided strong support for the prediction ( meszaros & rees 1997 ) that afterglows arise from the relativistic blast - wave generated as the grb outflow ejecta interacts with the ambient medium . if... | has been proposed most often to be the reason for the x - ray afterglow complexity . we examine 117 light - curve breaks of 98 swift x - ray afterglows , selected for their high - quality monitoring and well - constrained flux decay rates . thirty percent of afterglows have a break that can be an adiabatic jet - break ... | + since its launch in 2004 , the swift satellite has monitored the x - ray afterglows of several hundred gamma - ray bursts , and revealed that their x - ray light - curves are more complex than previously thought , exhibiting up to three power - law segments . energy injection into the relativistic blast - wave ene... |
1212.1486 | c | by comparing the flux decay index ( @xmath12 ) with the spectral slope ( @xmath13 ) measured for a set of 98 well - sampled swift x - ray afterglows with the expectations for the forward - shock model , we find that about a third of those afterglows display a break that could be the traditional ` jet - break ' claimed ... | the remaining 12 percent that are not jet - breaks , as well as the existence of two breaks in 19 afterglows ( out of which only one can be a jet - break ) , suggest that some x - ray breaks arise from a sudden change in the rate at which energy is added to the blast - wave , and it may well be that a larger fraction o... | + since its launch in 2004 , the swift satellite has monitored the x - ray afterglows of several hundred gamma - ray bursts , and revealed that their x - ray light - curves are more complex than previously thought , exhibiting up to three power - law segments . energy injection into the relativistic blast - wave ene... |
hep-lat0403005 | i | a direct calculation of multi - nucleon processes such as @xmath55 is impossible on a euclidean space lattice . as briefly mentioned in the introduction , the obstruction is the maiani - testa theorem @xcite which precludes the calculation of s - matrix elements away from kinematic thresholds in an infinite volume . in... | the energies of the lowest - lying states of two nucleons on a finite volume lattice with periodic boundary conditions in the presence of a background magnetic field are sufficient to determine the local four - nucleon operators that contribute to the deuteron magnetic moment and to the threshold cross - section of . s... | 0.5 cm we demonstrate how to make rigorous predictions for electroweak matrix elements in nuclear systems directly from qcd . more precisely , we show how to determine the short - distance contributions to low - momentum transfer electroweak matrix elements in the two - nucleon sector from lattice qcd . in potential mo... |
1307.0872 | i | the utility maximization is a basic problem in mathematical finance . it was introduced by merton @xcite . using stochastic control methods , he exhibits a closed formula for the value function and the optimal proportion - portfolio when the risky assets follow a geometric brownian motion and the utility function is of... | : we study a robust utility maximization problem from terminal wealth and consumption under a convex constraints on the portfolio . we state the existence and the uniqueness of the consumption - investment strategy by studying the associated quadratic backward stochastic differential equation ( bsde in short ) . we cha... | : we study a robust utility maximization problem from terminal wealth and consumption under a convex constraints on the portfolio . we state the existence and the uniqueness of the consumption - investment strategy by studying the associated quadratic backward stochastic differential equation ( bsde in short ) . we cha... |
0802.3682 | i | during the last years , the field of ultracold few - body confined systems has progressed remarkably . by employing optical dipole traps @xcite and atom chips @xcite it is possible to fabricate mesoscopic structures in which the atoms are freezed to occupy a single or a few lowest quantum states of a confining potentia... | [ txt : abstract ] we develop a grid method for multi - channel scattering of atoms in a waveguide with harmonic confinement . collisions of identical bosonic and fermionic as well as distinguishable atoms in harmonic traps with a single frequency permitting the center - of - mass ( c.m . ) separation are explored in d... | [ txt : abstract ] we develop a grid method for multi - channel scattering of atoms in a waveguide with harmonic confinement . this approach is employed to extensively analyze the transverse excitations and deexcitations as well as resonant scattering processes . collisions of identical bosonic and fermionic as well as... |
0802.3682 | r | with the above - described method being implemented we have analyzed the two - body scattering under the transverse harmonic confinement for both cases of identical and distinguishable colliding atoms . for confined scattering of identical atoms one has to distinguish the bosonic and fermionic cases . in the case of tw... | this approach is employed to extensively analyze the transverse excitations and deexcitations as well as resonant scattering processes . to four open transverse channels are considered . previously obtained analytical results are extended significantly here . series of feshbach resonances in the transmission behaviour ... | [ txt : abstract ] we develop a grid method for multi - channel scattering of atoms in a waveguide with harmonic confinement . this approach is employed to extensively analyze the transverse excitations and deexcitations as well as resonant scattering processes . collisions of identical bosonic and fermionic as well as... |
0802.3682 | i | we have analyzed atomic multi - channel scattering in a 2d harmonic confinement . identical bosonic and fermionic scattering as well as scattering of distinguishable atoms in traps with the same frequency for the different species have been explored . equal frequencies allows us to separate the c.m . and relative motio... | we reproduce the well - known confinement - induced resonances ( cirs ) for bosonic , fermionic and heteronuclear collisions . in case of the multi - mode regime up possible applications include , e.g. , cold and ultracold atom - atom collisions in atomic waveguides and electron - impurity scattering in quantum wires . | [ txt : abstract ] we develop a grid method for multi - channel scattering of atoms in a waveguide with harmonic confinement . this approach is employed to extensively analyze the transverse excitations and deexcitations as well as resonant scattering processes . collisions of identical bosonic and fermionic as well as... |
1312.4971 | i | let @xmath3 be a finite , undirected graph without loops or multiple edges . for @xmath4 , the _ distance _ from @xmath5 to @xmath2 is the least number of edges in a path from @xmath5 to @xmath2 , and is denoted @xmath6 ( or simply @xmath7 if @xmath0 is clear from the context ) . a _ resolving set _ for a graph @xmath3... | a _ resolving set _ for a graph is a collection of vertices , chosen so that for each vertex , the list of distances from to the members of uniquely specifies . the _ dimension _ of is the smallest size of a resolving set for . much attention has been paid to the metric dimension of distance - regular graphs . | a _ resolving set _ for a graph is a collection of vertices , chosen so that for each vertex , the list of distances from to the members of uniquely specifies . the _ dimension _ of is the smallest size of a resolving set for . much attention has been paid to the metric dimension of distance - regular graphs . work of ... |
1312.4971 | r | given that imprimitive distance - regular graphs may be reduced to primitive graphs by the operations of halving and folding , it is desirable to obtain relationships between resolving sets and metric dimension for imprimitive graphs and their halved and/or folded graphs . in this section , we obtain such relationships... | work of babai from the early 1980s yields general bounds on the metric dimension of primitive distance - regular graphs in terms of their parameters . we show how the metric dimension of an imprimitive distance - regular graph can be related to that of its halved and folded graphs , but also consider infinite families ... | a _ resolving set _ for a graph is a collection of vertices , chosen so that for each vertex , the list of distances from to the members of uniquely specifies . the _ dimension _ of is the smallest size of a resolving set for . much attention has been paid to the metric dimension of distance - regular graphs . work of ... |
1411.4530 | i | in the field of ion storage rings dedicated to molecular and atomic physics experiments , the electrostatic cryogenic storage ring ( csr ) @xcite of the max planck institute for nuclear physics ( mpik ) in heidelberg , germany , bridges the gap between traditional medium - energy magnetic heavy - ion synchrotrons , lik... | a compact , highly efficient single - particle counting detector for ions of kev / u kinetic energy , movable by a long - stroke mechanical translation stage , has been developed at the max - planck - institut fr kernphysik ( max planck institute for nuclear physics , mpik ) . both , we present a series of functional t... | a compact , highly efficient single - particle counting detector for ions of kev / u kinetic energy , movable by a long - stroke mechanical translation stage , has been developed at the max - planck - institut fr kernphysik ( max planck institute for nuclear physics , mpik ) . both , detector and translation mechanics ... |
1502.01074 | i | consensus algorithms have been recognized as an important step in a variety of decentralized and distributed algorithms , such as the rendezvous problem , distributed convex optimization or distributed sensing . we pose and solve in this paper what we term the _ weighted consensus _ problem over a directed graph . spec... | a consensus system is a linear multi - agent system in which agents communicate to reach a so - called consensus state , defined as the average of the initial states of the agents . consider a more generalized situation in which each agent is given a positive weight and the consensus state is defined as the weighted av... | a consensus system is a linear multi - agent system in which agents communicate to reach a so - called consensus state , defined as the average of the initial states of the agents . consider a more generalized situation in which each agent is given a positive weight and the consensus state is defined as the weighted av... |
math-ph0505081 | i | one of the possible applications of quantum deformations of groups and algebras @xcite is the construction of classical and quantum integrable systems with an arbitrary number of degrees of freedom which was presented in @xcite . in this context , poisson coalgebras ( poisson algebras endowed with a compatible coprod... | a family of classical integrable systems defined on a deformation of the two - dimensional sphere , hyperbolic and ( anti-)de sitter spaces is constructed through hamiltonians defined on the non - standard quantum deformation of a poisson coalgebra . all these spaces have a non - constant curvature that depends on the ... | a family of classical integrable systems defined on a deformation of the two - dimensional sphere , hyperbolic and ( anti-)de sitter spaces is constructed through hamiltonians defined on the non - standard quantum deformation of a poisson coalgebra . all these spaces have a non - constant curvature that depends on the ... |
1502.04212 | i | let us consider a non - convex higher order variational problem in the one - dimensional case , which is the obstacle problem for the energy as proposed in @xcite : @xmath1=\varepsilon^2 \int \kappa^2 ds + \int ds - \int_{\{u=\psi\ } } ( 1-\alpha)\ ds.\end{aligned}\ ] ] here a smooth function @xmath2\rightarrow\mathbb{... | a free boundary problem arising from materials science is studied in the one - dimensional case . the problem studied here is an obstacle problem for the non - convex energy consisting of a bending energy , tension and an adhesion energy . if the bending energy , which is a higher order term , is deleted then `` edge '... | a free boundary problem arising from materials science is studied in the one - dimensional case . the problem studied here is an obstacle problem for the non - convex energy consisting of a bending energy , tension and an adhesion energy . if the bending energy , which is a higher order term , is deleted then `` edge '... |
astro-ph0506152 | i | proper motion catalogs have historically been the primary sources for the identification of stellar systems in the vicinity of the sun . while star distances are ultimately determined from measurements of annual parallactic motions , these require a substantial investment of time and effort . parallax programs are thus... | trigonometric parallax measurements are found in the literature for 1,676 of the stars in the sample ; photometric and spectroscopic distance moduli are found for another 783 objects . the remaining 1,672 objects are reported here as nearby star candidates for the first time . the list of new candidates includes 539 st... | a list of 4,131 dwarfs , subgiants , and giants located , or suspected to be located , within 33 parsecs of the sun is presented . all the stars are drawn from the new lspm - north catalog of 61,976 stars with annual proper motions larger than yr . trigonometric parallax measurements are found in the literature for 1,6... |
astro-ph0506152 | c | this paper has presented a list of nearby and candidate nearby main sequence stars , subgiants , and giants within 33 pc of the sun . the list is based on an analysis of the lspm - north catalog of stars with proper motions @xmath105 yr@xmath1 . the census contains a total of 4221 stars in the half of the sky north of ... | a list of 4,131 dwarfs , subgiants , and giants located , or suspected to be located , within 33 parsecs of the sun is presented . all the stars are drawn from the new lspm - north catalog of 61,976 stars with annual proper motions larger than yr . it is estimated that ( ) of nuclear burning stars within 33 parsecs ( 2... | a list of 4,131 dwarfs , subgiants , and giants located , or suspected to be located , within 33 parsecs of the sun is presented . all the stars are drawn from the new lspm - north catalog of 61,976 stars with annual proper motions larger than yr . trigonometric parallax measurements are found in the literature for 1,6... |
nucl-th0212025 | c | the dressed rpa equations have been extended to account for the coupling of two ph phonons in forming the excited states of a many - body system . the coupling among ph and multi - phonon configurations is conceptually similar to the interacting boson model of ref . @xcite but limited , in this application , to only tw... | the resulting formalism is applied to study the low - lying excitation spectrum of . the stability of the present calculation is tested vs. the truncation of model space . it is demonstrated that when single - particle strength fragmentation is properly considered , the present formalism exhibits convergence with respe... | a microscopic formalism is developed that includes the coupling to two particle - hole phonons in the particle - hole propagator by extending the dressed random phase approximation ( drpa ) equation for a finite system . the resulting formalism is applied to study the low - lying excitation spectrum of . it is observed... |
0901.1050 | i | about 1960 , a change in education and evaluation of general phenomenological thermodynamics was observed . before 1960 , it was mainly based on arguments by carnot , kelvin and clausius . after 1960 , it was mainly based on the gibbs distribution of statistical mechanics . this gibbs rational thermodynamics has the fo... | a new thermodynamics for liquids related to von laue s approach ( 1917 ) substitutes some particle priors of gibb s rational thermodynamics . this allows the definition of a new dynamic entity ( defect ) whose diffusion properties also claim a largest causal region ( speckle ) . in the frame of the hidden charge model ... | a new thermodynamics for liquids related to von laue s approach ( 1917 ) substitutes some particle priors of gibb s rational thermodynamics . this allows the definition of a new dynamic entity ( defect ) whose diffusion properties also claim a largest causal region ( speckle ) . in the frame of the hidden charge model ... |
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