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1110.5365 | i | woodin showed that the existence of a measurable cardinal at which @xmath2 fails is equiconsistent with the existence of a cardinal @xmath1 that is @xmath5-tall ( see @xcite , @xcite , or @xcite ) , where a cardinal @xmath1 is _ @xmath4-tall _ if there is a nontrivial elementary embedding @xmath6 with critical point @x... | we determine the large cardinal consistency strength of the existence of a-supercompact cardinal such that fails at . indeed , we show that the existence of a-supercompact cardinal such that is equiconsistent with the existence of a-supercompact cardinal that is also-tall . we also prove some basic facts about the larg... | we determine the large cardinal consistency strength of the existence of a-supercompact cardinal such that fails at . indeed , we show that the existence of a-supercompact cardinal such that is equiconsistent with the existence of a-supercompact cardinal that is also-tall . we also prove some basic facts about the larg... |
hep-ph9609339 | i | theoretical studies of light hadron spectroscopy have led to the widespread belief that gluonic excitations are present in the spectrum of hadrons , so more resonances should be observed than are predicted by the conventional @xmath0 and @xmath9 quark model . the two general categories of gluonic mesons expected are gl... | we discriminate gluonic hadrons from conventional states by surveying radial and orbital excitations of all i=0 and i=1 systems anticipated up to 2.1 gev . we give detailed predictions of their quasi - two - body branching fractions and identify characteristic decay modes that can isolate quarkonia . s1s s0s p2p p1p p0... | we discriminate gluonic hadrons from conventional states by surveying radial and orbital excitations of all i=0 and i=1 systems anticipated up to 2.1 gev . we give detailed predictions of their quasi - two - body branching fractions and identify characteristic decay modes that can isolate quarkonia . several of the `` ... |
math0106164 | i | the family of 2-bridge knots / links is a well - studied subject , starting from the classical papers of listing , dehn , alexander , reidemeister , schubert and others . almost everything is known about the symmetries , invariants , and geometric properties of these links , of their complements , and of manifolds conn... | we discuss 3-manifolds which are cyclic coverings of the 3-sphere , branched over 2-bridge knots and links . the homology groups are given for a wide class of cases . moreover , we prove that each singly - cyclic branched covering of a 2-bridge link is the composition of a meridian - cyclic branched covering of a deter... | we discuss 3-manifolds which are cyclic coverings of the 3-sphere , branched over 2-bridge knots and links . different descriptions of these manifolds are presented : polyhedral , heegaard diagram , dehn surgery and coloured graph constructions . using these descriptions , we give presentations for their fundamental gr... |
1602.01400 | r | using the f164n image in figure 1 as a guide , spectra that sample three different regions were extracted for detailed investigation : ( 1 ) the irc , ( 2 ) the eastern portion of the ifu , where faint sub - structures are evident , and ( 3 ) the western portion of the ifu , where the light distribution is more uniform... | we discuss integral field spectra of the compact star - forming complex that is the brightest near - infrared ( nir ) source in the central regions of the starburst galaxy ngc 253 . absorption features in the spectrum of the star - forming complex are weaker than in the surroundings . | we discuss integral field spectra of the compact star - forming complex that is the brightest near - infrared ( nir ) source in the central regions of the starburst galaxy ngc 253 . the spectra cover the and passbands and were recorded with the gemini nir spectrograph during sub - arcsec seeing conditions . absorption ... |
1602.01400 | c | the stellar content near the center of the starburst galaxy ngc 253 has been investigated using nir ifu spectra recorded with gnirs on gs during sub - arcsec seeing conditions . the gnirs ifu samples a @xmath81 arcsec@xmath82 area , which corresponds to @xmath83 kpc@xmath82 at the distance of ngc 253 . the irc , which ... | an absorption feature is found near m that coincides with the location of a c bandhead . if as suggested by some studies the star - forming complex is centered on the galaxy nucleus , which presumably contains a large population of old and intermediate - age stars , then the nucleus of ngc 253 is currently experienci... | we discuss integral field spectra of the compact star - forming complex that is the brightest near - infrared ( nir ) source in the central regions of the starburst galaxy ngc 253 . the spectra cover the and passbands and were recorded with the gemini nir spectrograph during sub - arcsec seeing conditions . absorption ... |
1111.7275 | i | the problem of quantum quench , i.e. the response of a system to a time dependent coupling , has recently attracted a lot of attention in several areas of many - body physics , particularly because of progress in cold atom experiments @xcite,@xcite,@xcite . this problem is interesting for at least two reasons . the fir... | our emphasis is on situations where a subset of bulk fields can be treated in a probe approximation . we show that thermalization can nevertheless happen - this is signalled by formation of apparent horizons on the brane worldvolume . in the second setup , we consider a probe bulk scalar field in the background of a ad... | we discuss recent results in the study of the evolution of strongly coupled field theories in the presence of time dependent couplings using the holographic correspondence . the aim is to understand ( i ) thermalization and ( ii ) universal behavior when the coupling crosses a critical point . our emphasis is on situat... |
1512.09213 | i | a standard strategy in the quantum chemistry of strongly correlated systems is to first compute an approximate zeroth - order wavefunction within an active space of frontier molecular orbitals . @xcite the description of the remaining correlation outside of the active space is then the purview of multi - reference dyna... | we discuss the time - dependent formulation of perturbation theory in the context of the interacting zeroth - order hamiltonians that appear in multi - reference situations . as an example , we present a time - dependent formulation and implementation of second - order-electron valence perturbation theory . the resulti... | we discuss the time - dependent formulation of perturbation theory in the context of the interacting zeroth - order hamiltonians that appear in multi - reference situations . as an example , we present a time - dependent formulation and implementation of second - order-electron valence perturbation theory . the resulti... |
0810.3767 | i | the energetic gamma - ray experiment telescope ( egret ) aboard the _ compton gamma - ray observatory _ detected the gamma - ray emissions from six pulsars ( thompson 2004 ) , five of which show pulsed radio emissions . the sixth , geminga pulsar , has known as a radio quiet @xmath0-ray pulsar or with very weak radio e... | we discuss-ray emissions from the outer gap accelerators of middle - aged pulsars for part of the series of our studies . a two - dimensional electrodynamic model is used to solve the distribution of accelerating electric fields with electron and positron pair creation and radiation processes in the magnetic meridional... | we discuss-ray emissions from the outer gap accelerators of middle - aged pulsars for part of the series of our studies . a two - dimensional electrodynamic model is used to solve the distribution of accelerating electric fields with electron and positron pair creation and radiation processes in the magnetic meridional... |
0810.3767 | r | in this section , we apply the model to the geminga pulsar and constrain the magnetic inclination and viewing angles . first , we will show structure of the outer gap that occupies most of the region between the last - open line and the critical field line ( section [ gapgeo ] ) . then we will show that the calculated... | for the geminga pulsar , we demonstrate that the outward curvature radiation dominates in the spectrum above 10 mev , while the inward synchrotron radiation dominates below 10 mev . we find that the computed spectrum is consistent with the observations in x - ray through-ray bands . with the pulse morphology of the-r... | we discuss-ray emissions from the outer gap accelerators of middle - aged pulsars for part of the series of our studies . a two - dimensional electrodynamic model is used to solve the distribution of accelerating electric fields with electron and positron pair creation and radiation processes in the magnetic meridional... |
0810.3767 | i | we summarize the results of our work as follows . 1 . we have studied the non - thermal emissions of the geminga pulsar with the outer gap accelerator model . we solved the accelerating electric field with the pair creation and the radiation processes in the magnetic meridional plane . we demonstrated that the calcu... | we also apply our method to another four middle - aged radio pulsars , whose spin - down power and distance from the earth expect the possibility of detection of-ray emissions from those pulsars by fermi telescope . applying the inclination angle and the viewing angle inferred from radio polarization characteristics , ... | we discuss-ray emissions from the outer gap accelerators of middle - aged pulsars for part of the series of our studies . a two - dimensional electrodynamic model is used to solve the distribution of accelerating electric fields with electron and positron pair creation and radiation processes in the magnetic meridional... |
astro-ph0410164 | i | we have presented a sample and basic properties of a set of low redshift ( @xmath142 ) galaxies in the sdss . most interestingly , this sample is the only sample of galaxies extending down to @xmath143 which is unbiased with respect to environment . 1 . the slope of the luminosity function at low luminosities ( @x... | we examine a sample of low redshift ( mpc ) field galaxies including galaxies with luminosities as low as , selected from the sloan digital sky survey data release 2 ( sdss ) . we present the luminosity function as well as the broad - band properties of low luminosity galaxies in this sample . | we examine a sample of low redshift ( mpc ) field galaxies including galaxies with luminosities as low as , selected from the sloan digital sky survey data release 2 ( sdss ) . the sample is unique in containing galaxies of extremely low luminosities in a wide range of environments , selected with uniform and well - un... |
gr-qc9501039 | c | we have derived a number of new exact solutions for anisotropic cosmologies in scalar - tensor gravity theories where previous results were in general restricted to isotropic models @xcite or the particular case of brans - dicke gravity @xcite . in the original , or jordan , frame the non - minimal coupling of the bran... | we examine homogeneous but anisotropic cosmologies in scalar - tensor gravity theories , including brans - dicke gravity . we present a method for deriving solutions for any isotropic perfect fluid with a barotropic equation of state ( ) in a spatially flat ( bianchi type i ) cosmology . | we examine homogeneous but anisotropic cosmologies in scalar - tensor gravity theories , including brans - dicke gravity . we present a method for deriving solutions for any isotropic perfect fluid with a barotropic equation of state ( ) in a spatially flat ( bianchi type i ) cosmology . these models approach an isotr... |
gr-qc9306004 | i | the emergence of classical dynamics from the underlying quantum behaviour still continues to be one of the foremost questions in physics today . two ingredients essential to this transition are ( i ) the establishing of suitable `` classical '' correlations between appropriate coordinates and their conjugate momenta ( ... | we look for decoherence in both the environment induced superselection ( eis ) and consistent histories ( ch ) frameworks . we propose a general measure of the coherence of the reduced density matrix and find that eis decoherence occurs in a number of bases for this model . the decoherence functional gives similar resu... | we examine the decoherence properties of a quantum open system as modeled by a quantum optical system in the markov regime . we look for decoherence in both the environment induced superselection ( eis ) and consistent histories ( ch ) frameworks . we propose a general measure of the coherence of the reduced density ma... |
astro-ph9911491 | c | in the present paper , we investigated the power spectrum of cosmological objects on a light cone focusing on the redshift - space distortions in linear theory of density perturbations . we developed theoretical formulations to compute the power spectrum which properly takes into account the light - cone effect and the... | we examine the effects of the linear and the cosmological redshift - space distortions on the power spectrum of cosmological objects on a light cone . we develop theoretical formulae for the power spectrum in linear theory of density perturbations in a rigorous manner starting from first principle corresponding to four... | we examine the effects of the linear and the cosmological redshift - space distortions on the power spectrum of cosmological objects on a light cone . we develop theoretical formulae for the power spectrum in linear theory of density perturbations in a rigorous manner starting from first principle corresponding to four... |
1508.02571 | i | powerful jets and outflows are commonly observed in accreting black hole systems including active galactic nuclei ( agns ) and x - ray binaries ( xrbs ) @xcite . in spite of the availability of wealth of high resolution observations , the physical mechanism of jet generation and its powering processes are still remain ... | we examine the properties of the outflowing matter from an advective accretion disc around a spinning black hole . during accretion , rotating matter experiences centrifugal pressure supported shock transition that effectively produces a virtual barrier around the black hole in the form of post - shock corona ( hereaft... | we examine the properties of the outflowing matter from an advective accretion disc around a spinning black hole . during accretion , rotating matter experiences centrifugal pressure supported shock transition that effectively produces a virtual barrier around the black hole in the form of post - shock corona ( hereaft... |
hep-th0009188 | i | recently , there has been a lot of progress in understanding @xmath0 chern - simons theory on @xmath1 and its related invariants , the knot invariants @xcite , from a topological string theory point of view @xcite . in a striking conjecture , ooguri and vafa @xcite have proposed a formulation of knot invariants on @xma... | tifr / th/00 - 53 + september , 2000 * on link invariants and topological string amplitudes * + p. ramadevi + _ physics department , + indian institute of technology bombay , + mumbai 400 076 , india + _ tapobrata sarkar + _ department of theoretical physics , + tata institute of fundamental research , + homi bhabha... | we explicitly show that the new polynomial invariants for knots , upto nine crossings , agree with the ooguri - vafa conjecture relating chern - simons gauge theory to topological string theory on the resolution of the conifold . tifr / th/00 - 53 + september , 2000 * on link invariants and topological string amp... |
1112.1077 | i | galaxies in the local universe are found in a bimodal distribution in color mass ( or magnitude ) space @xcite . the so - called blue cloud is made up mostly of star - forming , disk galaxies , while the majority of quiescent galaxies with early - type morphologies lie on a tight relation between color and mass known ... | we investigate how a realistic red sequence population set up by evolves under different assumptions for the merger and star formation histories , comparing changes in color , luminosity , and mass . the resultant evolution appears much slower , resembling the passive evolution of a population that formed at high redsh... | we explore the effects of mergers on the evolution of massive early - type galaxies by modeling the evolution of their stellar populations in a hierarchical context . we investigate how a realistic red sequence population set up by evolves under different assumptions for the merger and star formation histories , compar... |
1112.1077 | c | the behavior reported in this paper is remarkably robust to a number of the model choices we have made . though some of the galaxy properties are taken directly from the sam , and thus depend on the parameters and prescriptions used there , others are determined independently in this work . choices made in the three mo... | we explore the effects of mergers on the evolution of massive early - type galaxies by modeling the evolution of their stellar populations in a hierarchical context . this manifestation of the progenitor bias increases the scatter in age and results in even smaller changes in color and luminosity between and at a fixed... | we explore the effects of mergers on the evolution of massive early - type galaxies by modeling the evolution of their stellar populations in a hierarchical context . we investigate how a realistic red sequence population set up by evolves under different assumptions for the merger and star formation histories , compar... |
1611.03413 | i | the large - scale modeling of fluid flow dynamics remains nowadays a major research issue in fluid mechanics or in geophysics despite an enormous research effort since the first investigations on the subject 150 years ago @xcite . the research themes behind this topic cover fundamental issues such as turbulence modelin... | however , it is not anymore obtained from an analogy with molecular dissipation but ensues rigorously from the random modeling of the flow . we assess and compare numerically those models on a standard green - taylor vortex flow at reynolds 1600 . large - scale fluid flow dynamics , stochastic transport , subgrid model... | we explore the potential of a formulation of the navier - stokes equations incorporating a random description of the small - scale velocity component . this model , established from a version of the reynolds transport theorem adapted to a stochastic representation of the flow , gives rise to a large - scale description... |
1002.3605 | i | in recent years the type ia supernovae ( sne ia ) observations have indicated a possibly late time _ accelerated expansion _ of the universe @xcite-@xcite . this discovery has been supported also by indirect observations of the expansion of the universe like the cosmic microwave background ( cmb ) @xcite and the large ... | we explore the viability of a bulk viscous matter - dominated universe to explain the present accelerated expansion of the universe . the model is composed by a pressureless fluid with bulk viscosity of the form where and are constants and is the hubble parameter . the pressureless fluid characterizes both the baryon a... | we explore the viability of a bulk viscous matter - dominated universe to explain the present accelerated expansion of the universe . the model is composed by a pressureless fluid with bulk viscosity of the form where and are constants and is the hubble parameter . the pressureless fluid characterizes both the baryon a... |
1002.3605 | c | we have explored a bulk viscous matter - dominated cosmological model composed by a pressureless fluid ( dust ) with bulk viscosity of the form @xmath9 , representing both baryon and dark matter components . one of the advantage of this model is that it resolves automatically the `` coincidence problem '' because it is... | on the other hand , we compute the best estimated values of and using the type ia supernovae ( sne ia ) probe . we find that from all the possible scenarios for the universe , the preferred one by the best estimated values of is that of an expanding universe beginning with a big - bang , followed by a decelerated expan... | we explore the viability of a bulk viscous matter - dominated universe to explain the present accelerated expansion of the universe . the model is composed by a pressureless fluid with bulk viscosity of the form where and are constants and is the hubble parameter . the pressureless fluid characterizes both the baryon a... |
cond-mat0609457 | i | the reliable calculation of physical properties of interacting quantum mechanical systems presents a formidable task . typically , one has to cope with the interplay of different energy - scales possibly covering several orders of magnitude even for simple situations . approximate tools like perturbation theory , but e... | we extend the concept of the functional renormalization for quantum many - body problems to nonequilibrium situations . using a suitable generating functional based on the keldysh approach , we derive a system of coupled differential equations for the-particle vertex functions . the approach is completely general and a... | we extend the concept of the functional renormalization for quantum many - body problems to nonequilibrium situations . using a suitable generating functional based on the keldysh approach , we derive a system of coupled differential equations for the-particle vertex functions . the approach is completely general and a... |
hep-ph0305130 | c | in this paper , we presented an analysis of the wmap data set with an emphasis on parameters relevant for distinguishing among the various possible models for inflation . in contrast to previous analyses , we confined ourselves to cmb data only and performed a likelihood analysis over a grid of models including the ful... | we use only cmb data and perform a likelihood analysis over a grid of models including the full error covariance matrix . we find that a model with a scale - invariant scalar power spectrum ( ) , no tensor contribution , and no running of the spectral index , is within the 1- contours of both data sets . we then apply ... | we extract parameters relevant for distinguishing among single - field inflation models from the wilkinson microwave anisotropy probe ( wmap ) data set , and from a combination of the wmap data and seven other cosmic microwave background ( cmb ) experiments . we use only cmb data and perform a likelihood analysis over ... |
astro-ph9711014 | i | in recent years it has become increasingly clear that magnetic fields play an important role in the process of star formation . ( see , for example , mouschovias & spitzer 1976 ; heiles et al . 1993 ; mckee et al . unfortunately , the experimental techniques for measuring the strength and direction of magnetic fields a... | we have carried out vla zeeman observations of hi absorption lines toward the hii region in the m17 giant molecular cloud complex . we explore possible physical connections between these components and the m17 region based on calculations of hi column densities , line of sight magnetic field strengths , as well as comp... | we have carried out vla zeeman observations of hi absorption lines toward the hii region in the m17 giant molecular cloud complex . the resulting maps have 60 spatial resolution and 0.64 km s velocity separation . the hi absorption lines toward m17 show between 5 and 8 distinct velocity components which vary spatially... |
astro-ph9711014 | r | figure 1 shows our 21 cm continuum contours with an optical image from gull & balick ( 1974 ) and simplified @xmath38co contours from thronson & lada ( 1983 ) superimposed . the total continuum flux at 21 cm is @xmath39 jy calculated inside the 1 jy beam@xmath1 ( 250 k ) contour level ( lowest contour in fig . 1 ) . t... | the resulting maps have 60 spatial resolution and 0.64 km s velocity separation . we have detected a steep enhancement in the 20 km s hi column density and line of sight magnetic field strengths ( ) toward this boundary . a lower limit for the peak 20 km s hi column density is/ /k while the peak is g . in addition ... | we have carried out vla zeeman observations of hi absorption lines toward the hii region in the m17 giant molecular cloud complex . the resulting maps have 60 spatial resolution and 0.64 km s velocity separation . the hi absorption lines toward m17 show between 5 and 8 distinct velocity components which vary spatially... |
astro-ph9711014 | i | the hi absorption lines toward m17 show complicated profiles with 5 to 8 distinct velocity components . in general , the highest hi column densities are concentrated toward the hii region@xmath9m17 sw boundary . this effect is particularly noticeable in the velocity range of the 20 km s@xmath1 hi component . a lower l... | the hi absorption lines toward m17 show between 5 and 8 distinct velocity components which vary spatially in a complex manner across the source . in particular , an hi component at the same velocity as the southwestern molecular cloud ( m17 sw ) km s seems to originate from the edge - on interface between the hii re... | we have carried out vla zeeman observations of hi absorption lines toward the hii region in the m17 giant molecular cloud complex . the resulting maps have 60 spatial resolution and 0.64 km s velocity separation . the hi absorption lines toward m17 show between 5 and 8 distinct velocity components which vary spatially... |
1105.3447 | c | the relativistic coupled - cluster method we have developed to incorporate a nuclear spin - dependent perturbation is an apt one to calculate nuclear spin - dependent parity non - conservation in atoms and ions . the representation of the cluster amplitude within the electronic sector as a tensor operator of rank one a... | the coupled - cluster operators in the electronic sector are defined as tensor operators of rank one and we introduce suitable diagrammatic representations . for properties calculations , the electronic part is first calculated and later coupled to the nuclear spin part . the method is ideal to calculate parity violati... | we have developed a relativistic coupled - cluster theory to incorporate nuclear spin - dependent interaction hamiltonians perturbatively . in this theory , the coupled - cluster operators in the electronic sector are defined as tensor operators of rank one and we introduce suitable diagrammatic representations . for p... |
0805.3413 | i | the _ square kilometer array _ ( ska ) is the next generation radio telescope facility for the 21st century . although it is still in the design stage and unlikely to be fully operational before 2020 , various pathfinder experiments will enter scientific service around 2010 ; one of these pathfinders will probably form... | we have developed a semi - empirical simulation of the extragalactic radio continuum sky suitable for aiding the design of next generation radio interferometers such as the square kilometer array ( ska ) . here we provide a description of the simulation to accompany the online release of a catalogue of 320 million simu... | we have developed a semi - empirical simulation of the extragalactic radio continuum sky suitable for aiding the design of next generation radio interferometers such as the square kilometer array ( ska ) . the emphasis is on modelling the large - scale cosmological distribution of radio sources rather than the internal... |
1101.4595 | c | we have found a remarkably large response of the transition temperature of cafe@xmath0as@xmath0 single crystals grown out of excess feas to annealing / quenching temperature . whereas crystals that are annealed at 400@xmath1 c exhibit a first order phase transition from a high temperature tetragonal to a low temperatur... | we have found a remarkably large response of the transition temperature of cafeas single crystals grown out of excess feas to annealing / quenching temperature . whereas crystals that are annealed at 400 c exhibit a first order phase transition from a high temperature tetragonal to a low temperature orthorhombic and an... | we have found a remarkably large response of the transition temperature of cafeas single crystals grown out of excess feas to annealing / quenching temperature . whereas crystals that are annealed at 400 c exhibit a first order phase transition from a high temperature tetragonal to a low temperature orthorhombic and an... |
1204.5990 | r | we measured the semi - major axis drift rate of all 1,252 numbered neas known as of march 2012 . some of the drift rates are not reliable because of poor sensitivity to yarkovsky influences ( fig . [ fig - xmas ] ) . plotted as a function of semi - major axis drift rate @xmath21 for 1,252 numbered neas . data sets ... | we have identified and quantified semi - major axis drifts in near - earth asteroids ( neas ) by performing orbital fits to optical and radar astrometry of all numbered neas . we focus on a subset of 54 neas that exhibit some of the most reliable and strongest drift rates . | we have identified and quantified semi - major axis drifts in near - earth asteroids ( neas ) by performing orbital fits to optical and radar astrometry of all numbered neas . we focus on a subset of 54 neas that exhibit some of the most reliable and strongest drift rates . our selection criteria include a _ yarkovsky ... |
1204.5990 | c | modeling of the yarkovsky effect is needed to improve trajectory predictions of near - earth asteroids and to refine our understanding of the dynamics of small bodies . using fits to astrometric data , we identified semi - major axis drifts in 54 neas , 42 of which show good agreement with numerical estimates of yarkov... | yarkovsky sensitivity _ metric that quantifies the detectability of semi - major axis drift in any given data set , a signal - to - noise metric , and orbital coverage requirements . in 42 cases , the observed drifts ( au / myr ) agree well with numerical estimates of yarkovsky drifts the drifts exceed nominal yarkovsk... | we have identified and quantified semi - major axis drifts in near - earth asteroids ( neas ) by performing orbital fits to optical and radar astrometry of all numbered neas . we focus on a subset of 54 neas that exhibit some of the most reliable and strongest drift rates . our selection criteria include a _ yarkovsky ... |
1310.0114 | c | we have made a cosmological hydrodynamic simulation tailored to examine the physical properties of very high-@xmath5 galaxies detected by the deep survey with hst / wfc3 performed in 2012 , the so - called udf12 campaign @xcite . our simulation code follows the formation and the evolution of star forming galaxies by ne... | we have performed a large cosmological hydrodynamics simulation tailored to the deep survey with the hubble space telescope made in 2012 , the so - called udf12 campaign . after making a light - cone output , we have applied the same color selection criteria as the udf12 campaign to select galaxies from our simulation ... | we have performed a large cosmological hydrodynamics simulation tailored to the deep survey with the hubble space telescope made in 2012 , the so - called udf12 campaign . after making a light - cone output , we have applied the same color selection criteria as the udf12 campaign to select galaxies from our simulation ... |
1604.05604 | r | table 1 lists basic properties of the final 26 rsmbh candidates . the fraction of the rsmbh candidates in sdss qso spectra with z @xmath18 0.25 is @xmath52% . if we assume the fraction of the rsmbh moving away from us has a similar fraction , about 4% of the sdss qsos are rsmbhs . * a histogram of projected recoil velo... | the projected recoil velocities range from to with a mean of . most of the rsmbh candidates are hosted by gas - rich lirgs / ulirgs , but only 23% of them shows signs of tidal features suggesting majority of them are advanced mergers . electron density in the narrow line region of the h ii rsmbh candidates is about 1/1... | we have performed a spectral decomposition to search for recoiling supermassive black holes ( rsmbh ) in the sdss qsos with . out of 1271 qsos , we have identified 26 rsmbh candidates that are recoiling toward us . the projected recoil velocities range from to with a mean of . most of the rsmbh candidates are hosted by... |
1604.05604 | i | we have performed a spectral decomposition to search for recoiling supermassive black hole ( rsmbh ) candidates in the sdss qsos with @xmath0 . we reported on the properties of the rsmbh candidates and on the mounting evidence that these candidates are in fact recoiling . @xmath83 out of 1271 qsos , we have identified ... | we have performed a spectral decomposition to search for recoiling supermassive black holes ( rsmbh ) in the sdss qsos with . out of 1271 qsos , we have identified 26 rsmbh candidates that are recoiling toward us . we find that the black hole masses of the rsmbh candidates are on average times smaller than that of thei... | we have performed a spectral decomposition to search for recoiling supermassive black holes ( rsmbh ) in the sdss qsos with . out of 1271 qsos , we have identified 26 rsmbh candidates that are recoiling toward us . the projected recoil velocities range from to with a mean of . most of the rsmbh candidates are hosted by... |
0907.0765 | i | modifications of general relativity ( gr ) on the largest scales have been advocated in order to give account for the present acceleration of the universe . attempts in this direction @xcite typically maintain the metric manifold structure of gr and change the dynamics of the gravitational field by effectively giving t... | we have recently proposed an ultra - strong " version of the equivalence principle ( ep ) that is not satisfied by standard semiclassical gravity . in the theory that we are conjecturing , the vacuum expectation value of the ( bare ) energy momentum tensor is exactly the same as in flat space : quartically divergent w... | we have recently proposed an ultra - strong " version of the equivalence principle ( ep ) that is not satisfied by standard semiclassical gravity . in the theory that we are conjecturing , the vacuum expectation value of the ( bare ) energy momentum tensor is exactly the same as in flat space : quartically divergent w... |
0803.0240 | r | in order to facilitate a systematic discussion of nlr models of blue outliers ( sect . 4.3 ) , we have investigated whether the non - shifted low - ionization lines have a ( faint ) high - ionization [ oiii ] counterpart and vice versa , other high - ionization lines show blueshifts , too ( sect . 3.3.1 ) , but they ar... | all [ oiii ] blue outliers have narrow widths of their broad balmer lines and high eddington ratios . while the presence of non - shifted low - ionization lines signifies the presence of a classical outer quiescent nlr in blue outliers , we also report the absence of any second , non - blueshifted [ oiii ] component fr... | we have studied the properties of seyfert galaxies with high [ oiii]5007 blueshifts ( `` blue outliers '' ) , originally identified because of their strong deviation from the relation of normal , narrow - line seyfert 1 ( nls1 ) and broad - line seyfert 1 ( bls1 ) galaxies . these blue outliers turn out to be important... |
0803.0240 | c | investigating the location of different types of galaxies on the @xmath0 plane , and their potential evolution across the plane , is of great interest in the context of galaxy formation and evolution models . in agn , stellar velocity dispersion is often difficult to measure , and the width of [ oiii ] has become a con... | these blue outliers turn out to be important test - beds for models of the narrow - line region ( nlr ) , for mechanisms of driving large - scale outflows , for links between nls1 galaxies and radio galaxies , and for orientation - dependent nls1 models . the origin of the wind remains speculative at this time ( collim... | we have studied the properties of seyfert galaxies with high [ oiii]5007 blueshifts ( `` blue outliers '' ) , originally identified because of their strong deviation from the relation of normal , narrow - line seyfert 1 ( nls1 ) and broad - line seyfert 1 ( bls1 ) galaxies . these blue outliers turn out to be important... |
0803.0240 | i | in [ oiii ] blue outliers with their extreme velocity shifts the effects of secondary influences on the nlr kinematics are enhanced or dominate completely . their study is therefore of great relevance for ( 1 ) scrutinizing the usefulness and limitations of [ oiii ] width as a proxy for stellar velocity dispersion ; ( ... | we have studied the properties of seyfert galaxies with high [ oiii]5007 blueshifts ( `` blue outliers '' ) , originally identified because of their strong deviation from the relation of normal , narrow - line seyfert 1 ( nls1 ) and broad - line seyfert 1 ( bls1 ) galaxies . we report the detection of a strong correlat... | we have studied the properties of seyfert galaxies with high [ oiii]5007 blueshifts ( `` blue outliers '' ) , originally identified because of their strong deviation from the relation of normal , narrow - line seyfert 1 ( nls1 ) and broad - line seyfert 1 ( bls1 ) galaxies . these blue outliers turn out to be important... |
astro-ph0002111 | i | an understanding of the ultraviolet ( uv ) properties of local galaxies is essential for interpreting images of high redshift systems and especially critical in searches for morphological evolution in the galaxy population . at redshifts of @xmath4 , the rest frame uv light of galaxies is shifted into the optical ( 1... | this sample , which includes a range of classical hubble types from elliptical to irregular with emphasis on spirals at low inclination angle , provides a valuable database for comparison with images of high galaxies whose fuv light is redshifted into the optical and near infrared bands . astro2 _ mission . | we have undertaken an imaging survey of 34 nearby galaxies in far ultraviolet ( fuv , ) and optical ( ) passbands to characterize galaxy morphology as a function of wavelength . this sample , which includes a range of classical hubble types from elliptical to irregular with emphasis on spirals at low inclination angle... |
astro-ph0002111 | i | we have presented fuv and optical images and surface brightness profiles for 34 galaxies observed with the uit and compared the apparent morphology at different wavelengths in the context of interpreting images of high redshift objects . the uit data represent the most detailed set of fuv images obtained to date for l... | we present images and surface brightness profiles for each galaxy , and we discuss the wavelength dependence of morphology for different hubble types in the context of understanding high objects . in general , the dominance of young stars in the fuv produces the patchy appearance of a morphological type later than tha... | we have undertaken an imaging survey of 34 nearby galaxies in far ultraviolet ( fuv , ) and optical ( ) passbands to characterize galaxy morphology as a function of wavelength . this sample , which includes a range of classical hubble types from elliptical to irregular with emphasis on spirals at low inclination angle... |
astro-ph0607062 | r | we run on objects with different size and detection significance to understand the conditions under which converges reliably , which we define to be @xmath3 rate of successful shape measurement . shear estimate accuracy tests are subsequently performed only in @xmath3 convergence conditions , to preclude any selectio... | the test simulates noisy galaxy images convolved with anisotropic psfs , and attempts to recover an input shear . the systematic error in shear recovery is divided into two classes , calibration ( multiplicative ) and additive , with the latter arising from psf anisotropy . at s / n , the deconvolution method measures ... | we implement the elliptical gauss - laguerre ( egl ) galaxy - shape measurement method proposed by bernstein & jarvis ( 2002 ) [ ] and quantify the shear recovery accuracy in weak lensing analysis . this method uses a deconvolution fitting scheme to remove the effects of the point - spread function ( psf ) . the test s... |
1401.0734 | i | fountain codes @xcite form a new family of linear erasure codes with several attractive properties . for a given set of @xmath0 input symbols , a fountain code produces a potentially limitless stream of output symbols , each created independently of others as a random combination of input symbols according to a given ... | we introduce a new family of fountain codes that are systematic and also have sparse parities . given an input of symbols , our codes produce an unbounded number of output symbols , generating each parity independently by linearly combining a logarithmic number of randomly selected input symbols . the construction guar... | we introduce a new family of fountain codes that are systematic and also have sparse parities . given an input of symbols , our codes produce an unbounded number of output symbols , generating each parity independently by linearly combining a logarithmic number of randomly selected input symbols . the construction guar... |
1702.00741 | i | with a laurent series @xmath2 with complex coefficients @xmath3 , one can associate a semi - infinite toeplitz matrix @xmath4 whose elements are given by @xmath5 in the theory of toeplitz matrices , @xmath6 is referred to as the symbol of @xmath4 . according to what properties of @xmath4 are of interest , the class of ... | we introduce and investigate a class of complex semi - infinite banded toeplitz matrices satisfying the condition that the spectra of their principal submatrices accumulate onto a real interval when the size of the submatrix grows to . we prove that a banded toeplitz matrix belongs to this class if and only if its symb... | we introduce and investigate a class of complex semi - infinite banded toeplitz matrices satisfying the condition that the spectra of their principal submatrices accumulate onto a real interval when the size of the submatrix grows to . we prove that a banded toeplitz matrix belongs to this class if and only if its symb... |
0810.0009 | i | supernova remnants ( snrs ) are a diverse class of objects that play an essential role in the dynamics of the interstellar medium ( ism ) and that produce and distribute most of the metals in the universe @xcite . since its launch , the _ chandra _ x - ray telescope has observed over one - hundred snrs in the milky way... | these include a power - ratio technique to measure morphological asymmetries , correlation - length analysis to probe chemical segregation and distribution , and wavelet - transform analysis to quantify substructure . additionally , we show the methods capabilities by applying them to the 55-ks _ chandra _ acis observa... | we introduce methods to quantify the x - ray morphologies of supernova remnants observed with the _ chandra _ x - ray telescope . these include a power - ratio technique to measure morphological asymmetries , correlation - length analysis to probe chemical segregation and distribution , and wavelet - transform analysis... |
cs0503061 | c | we introduce the use , monitoring , and enforcement of integrity constraints in trust management - style authorization systems . we consider the portions of the policy state that must be monitored to detect violations of integrity constraints . we also address the extra difficulty that not all participants in a trust m... | we introduce the use , monitoring , and enforcement of integrity constraints in trust management - style authorization systems . we consider what portions of the policy state must be monitored to detect violations of integrity constraints . then we address the fact that not all participants in a trust management system... | we introduce the use , monitoring , and enforcement of integrity constraints in trust management - style authorization systems . we consider what portions of the policy state must be monitored to detect violations of integrity constraints . then we address the fact that not all participants in a trust management system... |
cond-mat0310157 | i | the emergence of spatio - temporal ordered structures in nonlinear systems is an ideal laboratory for investigating the trend toward complexification observed in nature at the physical , chemical , and biological level @xcite . it is known that localized , or spatially - bound , order emerges in systems which are out o... | we investigate , analytically and numerically , the emergence of spatio - temporal order in nonequilibrium scalar field theories . the onset of order is triggered by destabilizing interactions ( dis ) , which instantaneously change the interacting potential from a single to a double - well , tunable to be either degene... | we investigate , analytically and numerically , the emergence of spatio - temporal order in nonequilibrium scalar field theories . the onset of order is triggered by destabilizing interactions ( dis ) , which instantaneously change the interacting potential from a single to a double - well , tunable to be either degene... |
1406.0976 | i | to investigate the theory of everything which explains gravity and quantum theory in a consistent way , several candidates have been proposed @xcite with string theory being one of the most competitive ideas @xcite . string theory can explain not only the finite quantum interactions of gravitons but also the possible m... | we investigate gravitational collapses of charged black holes in string - inspired gravity models , including dilaton gravity and braneworld model , as well as gravity and the ghost limit . if we turn on gauge coupling , the causal structures and the responses of the brans - dicke field depend on the coupling between t... | we investigate gravitational collapses of charged black holes in string - inspired gravity models , including dilaton gravity and braneworld model , as well as gravity and the ghost limit . if we turn on gauge coupling , the causal structures and the responses of the brans - dicke field depend on the coupling between t... |
1312.2840 | i | the search for lepton flavor violation ( lfv ) is going to live an unprecedented era with great experimental efforts in many different fronts . in addition to the well - known searches for the radiative decay @xmath3 , new projects involving other low - energy processes , such as @xmath1 or @xmath2 conversion in nuclei... | we investigate lepton flavor violation in the scotogenic model proposed by ma in which neutrinos acquire non - zero masses at the 1-loop level . although some works exist in this direction , they have mainly focused on the radiative decay . motivated by the promising new projects involving other low - energy processes ... | we investigate lepton flavor violation in the scotogenic model proposed by ma in which neutrinos acquire non - zero masses at the 1-loop level . although some works exist in this direction , they have mainly focused on the radiative decay . motivated by the promising new projects involving other low - energy processes ... |
1502.05866 | i | recent progress in laser technology has made it possible to produce isolated attosecond pulses @xcite , and with these electron dynamics can be followed on its natural time scale @xcite . one of the promising methods to follow sub - femtosecond dynamics in electronic systems is attosecond transient absorption spectrosc... | two models of the hydrogen molecular ion are considered : one where the internuclear separation is fixed , and one where the nuclei are free to vibrate . the spectra for the fixed nuclei model are similar to atomic spectra reported elsewhere , while the spectra obtained in the model including nuclear motion are very di... | we investigate the characteristic effects of nuclear motion on attosecond transient absorption spectra in molecules by calculating the spectrum for different model systems . two models of the hydrogen molecular ion are considered : one where the internuclear separation is fixed , and one where the nuclei are free to vi... |
1502.05866 | r | in this section we present the atas spectrum of eq . for two different 1d models of @xmath1 . in sec . [ fixeds ] we present the atas spectrum calculated in the fixed nuclei model of @xmath1 . for this system we recognize many features from atomic spectra previously reported in the literature @xcite . in sec . [ mov... | the spectrum obtained from h is compared to the result of a fixed - nuclei calculation . in the attosecond transient absorption spectra of h including nuclear motion we find a rich absorption structure corresponding to population of different vibrational states in the molecule , while the fixed - nuclei spectra again a... | we investigate the characteristic effects of nuclear motion on attosecond transient absorption spectra in molecules by calculating the spectrum for different model systems . two models of the hydrogen molecular ion are considered : one where the internuclear separation is fixed , and one where the nuclei are free to vi... |
astro-ph0004195 | r | in this section , we study the effects of an extended power - law electron distribution on the synchrotron emission spectra of adafs . figure 2 shows the various components of the spectrum of a typical hybrid model , with @xmath124 , @xmath125 , @xmath126 , and @xmath127 . compared to the spectrum of a pure thermal mod... | we investigate the effect of a hybrid electron population , consisting of both thermal and non - thermal particles , on the synchrotron spectrum , image size , and image shape of a hot accretion flow onto a supermassive black hole . we find two universal features in the emitted synchrotron spectrum : ( i ) a prominent ... | we investigate the effect of a hybrid electron population , consisting of both thermal and non - thermal particles , on the synchrotron spectrum , image size , and image shape of a hot accretion flow onto a supermassive black hole . we find two universal features in the emitted synchrotron spectrum : ( i ) a prominent ... |
astro-ph0004195 | c | in this paper we considered hot accretion flows around supermassive black holes , using the adaf model as a typical example . such hot flows are expected to occur at low mass - accretion rates . we assume that a fraction of the viscous dissipation energy in the accretion flow goes into accelerating electrons to a non -... | we show that such a hybrid distribution can be sustained in the flow because thermalization via coulomb collisions and synchrotron self - absorption are both inefficient . the presence of non - thermal electrons enlarges the size of the radio image at low frequencies and alters the frequency dependence of the bright... | we investigate the effect of a hybrid electron population , consisting of both thermal and non - thermal particles , on the synchrotron spectrum , image size , and image shape of a hot accretion flow onto a supermassive black hole . we find two universal features in the emitted synchrotron spectrum : ( i ) a prominent ... |
math0102170 | i | in this paper we investigate spectral properties of the linear operator @xmath6 acting on @xmath8 where @xmath2 is a @xmath9 constant matrix and @xmath10 denotes the ordinary differential operator @xmath11 the apparently simple combination of dirichlet and neumann boundary conditions allows self - adjointness if , an o... | we investigate the spectrum of a typical non - self - adjoint differential operator acting on , where is a constant matrix . we explore in detail the connection between the entries of and the spectrum of , we find necessary conditions to ensure similarity to a self - adjoint operator and give numerical evidence that su... | we investigate the spectrum of a typical non - self - adjoint differential operator acting on , where is a constant matrix . we impose dirichlet and neumann boundary conditions in the first and second coordinate respectively at both ends of\subset { \mathbb{r}}$ ] . for we explore in detail the connection between the e... |
1212.4136 | i | under the assumption of homogeneity and isotropy of the universe at large scales , and that general relativity is the correct theory of gravity , the accelerated expansion @xcite is due to an exotic component , with negative pressure , called dark energy ( de ) . moreover , structures such as galaxies and clusters of g... | we investigate the unification scenario provided by the generalised chaplygin gas model ( a perfect fluid characterized by an equation of state ) . our concerns lie with a possible tension existing between background kinematic tests and those related to the evolution of small perturbations . we analyse data from the ob... | we investigate the unification scenario provided by the generalised chaplygin gas model ( a perfect fluid characterized by an equation of state ) . our concerns lie with a possible tension existing between background kinematic tests and those related to the evolution of small perturbations . we analyse data from the ob... |
1212.4136 | c | we performed a bayesian analysis of the background behaviour of the gcg model using @xmath10 , snia , cmb and bao datasets . we focused particularly on the parameter @xmath1 , on which a huge literature already exists . our result is that @xmath11 , at the 2@xmath3 level , i.e. negative values of @xmath1 seem to be fav... | we show that a fluid description within this theory does not serve the purpose , but it is necessary to frame the generalised chaplygin gas in a scalar field theory . finally , we address the standard general relativistic unification picture provided by the generalised chaplygin gas in the case : this is usually consid... | we investigate the unification scenario provided by the generalised chaplygin gas model ( a perfect fluid characterized by an equation of state ) . our concerns lie with a possible tension existing between background kinematic tests and those related to the evolution of small perturbations . we analyse data from the ob... |
cond-mat9609007 | i | over the years it has been found that there exist many two - dimensional classical spin models , discrete and continuous alike , whose ground - state manifolds are macroscopically degenerate and , more interestingly , also exhibit critical behaviours , i.e. , spin - spin correlation functions within the ground - state ... | we map the ground - state ensemble of antiferromagnetic ising model of spin- on a triangular lattice to an interface model whose entropic fluctuations are proposed to be described by an effective gaussian free energy , which enables us to calculate the critical exponents of various operators in terms of the stiffness c... | we map the ground - state ensemble of antiferromagnetic ising model of spin- on a triangular lattice to an interface model whose entropic fluctuations are proposed to be described by an effective gaussian free energy , which enables us to calculate the critical exponents of various operators in terms of the stiffness c... |
astro-ph0402577 | c | we have measured the clustering of groups in the 2pigg sample constructed from the 2dfgrs by eke et al . ( 2004a ) . the group catalogue , made up of galactic systems with a minimum of two members , contains @xmath18429,000 groups , out of which @xmath18416,000 are at @xmath100 . the sample is sufficiently large and ho... | the clustering amplitude of the full 2pigg catalogue is weaker than that of 2dfgrs galaxies , in agreement with theoretical predictions . we have subdivided the 2pigg catalogue into samples that span a factor of in median total luminosity . we demonstrate that the 2pigg results are in very good agreement with the clust... | we measure the clustering of galaxy groups in the 2dfgrs percolation - inferred galaxy group ( 2pigg ) catalogue . the 2pigg sample has 28877 groups with at least two members . the clustering amplitude of the full 2pigg catalogue is weaker than that of 2dfgrs galaxies , in agreement with theoretical predictions . we ha... |
astro-ph0609133 | i | supernovae influence the chemistry and physics in the interstellar medium ( ism ) from galactic scales down to the atomic level . primarily , it is the energy input of supernova explosions that drives important processes in the ism : strong shock waves accelerate , heat , and compress interstellar gas , destroy dust gr... | we observed the oxygen - rich large magellanic cloud ( lmc ) supernova remnant n132d ( snr052569.6 ) , using all instruments onboard the _ a emission hump appears superposed on the dust continuum , and we attribute this to pah bending modes . we discuss the bright infrared continuum and the polycyclic aromatic hydrocar... | we observed the oxygen - rich large magellanic cloud ( lmc ) supernova remnant n132d ( snr052569.6 ) , using all instruments onboard the _ spitzer space telescope _ , irs , irac , and mips ( infrared spectrograph , infrared array camera , multiband imaging photometer for spitzer ) . the 540 irs spectra toward the sout... |
astro-ph0609133 | r | n132d shows strong emission in the mips24@xmath0 band with a background subtracted peak surface brightness of 50@xmath12 in the southeastern rim . the total , background subtracted mips24@xmath0 flux integrated over the whole remnant is @xmath13jy . the surface brightness distribution follows the x - ray contours ve... | the 540 irs spectra toward the southeastern shell of the remnant show a steeply rising continuum with ] and ] as well as pah emission . we also present the spectrum of a fast moving ejecta knot , previously detected at optical wavelengths , which is dominated by strong ] and ] emission lines . irac 39 images do n... | we observed the oxygen - rich large magellanic cloud ( lmc ) supernova remnant n132d ( snr052569.6 ) , using all instruments onboard the _ spitzer space telescope _ , irs , irac , and mips ( infrared spectrograph , infrared array camera , multiband imaging photometer for spitzer ) . the 540 irs spectra toward the sout... |
astro-ph0609133 | c | we detect shocked interstellar clouds with irac due to their distinct emission in the irac channels ( cf . fig . [ fig : n132dknots ] ) . the irac emission knots seen in the northern central part and the northwestern rim of the remnant coincide with previously detected , bright optical ] and ] emission complexes nam... | we interpret the continuum as thermal emission from swept - up , shock - heated dust grains in the expanding shell of n132d , which is clearly visible in the mips 24 image . we also detect the well - known 11.3 pah c - h bending feature , and find the integrated strength of the 1520 hump about a factor of seven stro... | we observed the oxygen - rich large magellanic cloud ( lmc ) supernova remnant n132d ( snr052569.6 ) , using all instruments onboard the _ spitzer space telescope _ , irs , irac , and mips ( infrared spectrograph , infrared array camera , multiband imaging photometer for spitzer ) . the 540 irs spectra toward the sout... |
astro-ph0304404 | c | if evolutionary histories of elliptical galaxies depend on galaxy environment , their metallicity gradients and thus color gradients could also have some environmental dependences . as described in 1 , recent studies either observationally or theoretically suggest that ellipticals which reside in rich clusters tend t... | our aims are to study statistical properties of the color gradients and , by comparing them with those in less dense environments , to examine environmental dependence of color gradients in elliptical galaxies . those in the literature suggest that there is an environmental dependence in the relationship between color ... | we performed and band surface photometry for e / s0 galaxies in a nearby rich cluster abell 2199 to investigate their color gradients ( ) . our aims are to study statistical properties of the color gradients and , by comparing them with those in less dense environments , to examine environmental dependence of color gra... |
astro-ph0304404 | i | we performed @xmath0 and @xmath1 band surface photometry for e / s0 galaxies in abell 2199 and abell 2634 , and studied their @xmath2 color gradients . in order to sample spheroid dominated galaxies , the decomposition of the surface brightness profiles into @xmath38 bulge and exponential disk profiles was performed an... | we performed and band surface photometry for e / s0 galaxies in a nearby rich cluster abell 2199 to investigate their color gradients ( ) . we studied the distribution of the color gradients in the cluster ellipticals and found that the mean value of the color gradients is mag / dex , which can be converted to a metall... | we performed and band surface photometry for e / s0 galaxies in a nearby rich cluster abell 2199 to investigate their color gradients ( ) . our aims are to study statistical properties of the color gradients and , by comparing them with those in less dense environments , to examine environmental dependence of color gra... |
1701.02750 | i | since @xcite suggested that a galaxy might lose its interstellar medium ( ism ) by interacting with the intracluster medium ( icm ) in the cluster environment , much evidence for ram pressure stripping has been found to date . in early days , @xcite have shown that virgo galaxies are generally more deficient in hi comp... | these three galaxies show clear evidence of ram pressure stripping due to the cluster medium as found in previous hi imaging studies . using high - resolution co data , we investigate how the properties of the inner molecular gas disc change while a galaxy is undergoing hi stripping in the cluster . at given sensitivit... | we present 12co ( 21 ) data of three virgo spirals ngc 4330 , ngc 4402 and ngc 4522 obtained using the submillimeter array . these three galaxies show clear evidence of ram pressure stripping due to the cluster medium as found in previous hi imaging studies . using high - resolution co data , we investigate how the... |
1701.02750 | c | in this section , we compare 12co ( 2@xmath31 ) properties with other wavelength data including hi @xcite , optical ( dss2 red ) , fuv @xcite , and h@xmath0 ( ngc 4330 and ngc 4569 from @xcite , ngc 4402 from @xcite , ngc 4522 from koopmann , kenney , & young 2001 ) . co traces star - forming gas , and h@xmath0 and... | morphological peculiarities present in the molecular and atomic gas are closely related with each other , suggesting that molecular gas can be also affected by strong icm pressure even if it is not stripped . indeed , the distribution of h emission , a tracer of recent star formation , well coincides with that of the m... | we present 12co ( 21 ) data of three virgo spirals ngc 4330 , ngc 4402 and ngc 4522 obtained using the submillimeter array . these three galaxies show clear evidence of ram pressure stripping due to the cluster medium as found in previous hi imaging studies . using high - resolution co data , we investigate how the... |
1701.02750 | c | in this work , we have presented high - resolution 12co ( 2@xmath31 ) data obtained using the sma of three virgo spirals , ngc 4330 , ngc 4402 and ngc 4522 , which are undergoing active hi stripping due to ram pressure . by comparing with single - dish 12co ( 2@xmath31 ) , hi , fuv , h@xmath0 and dss2 red data , we ... | we present 12co ( 21 ) data of three virgo spirals ngc 4330 , ngc 4402 and ngc 4522 obtained using the submillimeter array . we discuss how icm pressure affects dense molecular gas and hence star formation properties while diffuse atomic gas is being removed from a galaxy . | we present 12co ( 21 ) data of three virgo spirals ngc 4330 , ngc 4402 and ngc 4522 obtained using the submillimeter array . these three galaxies show clear evidence of ram pressure stripping due to the cluster medium as found in previous hi imaging studies . using high - resolution co data , we investigate how the... |
astro-ph0305139 | c | the only object in our sample whose red optical spectrum is truly unique in comparison to the spectral standards is the t@xmath386p / t@xmath397p 2mass 0937 + 2931 . this object stands out in the near - infrared because of its enhanced cia h@xmath0 absorption ( resulting in a highly suppressed k - band peak ) and absen... | we find general agreement between optical and near - infrared types for nearly all of the t dwarfs so far observed , including two earlier - type t dwarfs , within our classification uncertainties ( subtype ) . one of our objects , 2mass 0937 + 2931 , exhibits a peculiar spectrum , with a substantial red slope and rela... | we present 630010100 spectra for a sample of 13 t dwarfs observed using lris mounted on the keck i 10 m telescope . a variety of features are identified and analyzed , including pressure - broadened k i and na i doublets ; narrow cs i and rb i lines ; weak cah , crh , and feh bands ; strong ho absorption ; and a possi... |
astro-ph0305139 | i | we have examined lris red optical spectra for a sample of t dwarfs . these spectra are largely dominated by pressure - broadened na i and k i features , which are highly sensitive to temperature , gravity , and metallicity . weaker lines of cs i and rb i are also present , and appear to follow the trends of current che... | h emission is detected in three of the t dwarfs , strong in the previously reported active t dwarf 2mass 1237 + 6526 and weak in sdss 1254 and 2mass 1047 + 2124 . these results suggest that competing gravity and temperature effects compensate for each other over the 0.62.5 spectral region . we identify one possible mea... | we present 630010100 spectra for a sample of 13 t dwarfs observed using lris mounted on the keck i 10 m telescope . a variety of features are identified and analyzed , including pressure - broadened k i and na i doublets ; narrow cs i and rb i lines ; weak cah , crh , and feh bands ; strong ho absorption ; and a possi... |
1110.2496 | i | we present interferometric @xmath1co ( @xmath72 = 32 ) observations toward main bodies of the antennae galaxies ( ngc 4038/9 ) obtained using the sma . the image shows gas concentration at both nuclei and the overlap region , and the emission is roughly distributed along the dust lanes seen in the b - band image . th... | we find that half the co ( 32 ) emission originates in the overlap region where most of the tidally induced star formation had been previously found in shorter wavelength images , with the rest being centered on each of the nuclei . the gross distribution is consistent with lower resolution single dish images , but we... | we present a ( 100 pc ) resolutionco ( 32 ) map of the nearby intermediate stage interacting galaxy pair ngc 4038/9 ( the antennae galaxies ) obtained with the submillimeter array . we find that half the co ( 32 ) emission originates in the overlap region where most of the tidally induced star formation had been p... |
0712.2062 | c | we now summarize our main results before discussing them at a somewhat more general level . we have provided ample evidence that the onset of collective motion in vicsek - style models is a discontinuous ( first - order ) phase transition , with all expected hallmarks , in agreement with @xcite . we have made the (... | the onset of collective motion in such stochastic models with only local alignment interactions is studied in detail and shown to be discontinuous ( first - order like ) . the properties of the ordered , collectively moving phase are investigated . in a large domain of parameter space including the transition region , ... | we present a comprehensive study of vicsek - style self - propelled particle models in two and three space dimensions . the onset of collective motion in such stochastic models with only local alignment interactions is studied in detail and shown to be discontinuous ( first - order like ) . the properties of the ordere... |
1506.08913 | c | we present a detailed theoretical study of the spin response in hgte quantum wells where virtual - carrier - related processes are particularly relevant and exactly tractable within the effective bhz - model description . anomalous properties of the spin susceptibility and carrier - mediated magnetism are found in the ... | we present a comprehensive theoretical study of the static spin response in hgte quantum wells , revealing distinctive behavior for the topologically nontrivial inverted structure . most strikingly , the variety of counter - intuitive spin - response properties revealed in our study arises from the system s versatility... | we present a comprehensive theoretical study of the static spin response in hgte quantum wells , revealing distinctive behavior for the topologically nontrivial inverted structure . most strikingly , the ( long - wave - length ) spin susceptibility of the undoped topological - insulator system is constant and equal to ... |
1410.0785 | i | we propose a new computer assisted method for rigorously proving invertibility and bounding the norm of the inverse of operators of the form and the precise functions spaces in which we work will be specified later . ] @xmath1(t)=\left(v(t)-v(0)-\int_0^t a(s)v(s)ds , b_0v(0)+b_1v(1)\right),\hspace{2 mm } a(t),b_i\in\ma... | all truncation errors are accounted for and , if combined with interval arithmetic to bound the rounding errors , the computer generated results are mathematically rigorous . the method is formulated for-dimensional systems and does not require any special form for the vector field of the differential equation . two po... | we present a computer assisted method for generating existence proofs and a posteriori error bounds for solutions to two point boundary value problems ( bvps ) . all truncation errors are accounted for and , if combined with interval arithmetic to bound the rounding errors , the computer generated results are mathemati... |
1410.0785 | c | we have presented an a posteriori method for proving existence to and deriving rigorous error bounds for two point boundary value problems on a finite interval , summarized in theorem [ main_theorem ] . the method applies to general @xmath0-dimensional systems without any assumption on the form of the vector field . it... | we present a computer assisted method for generating existence proofs and a posteriori error bounds for solutions to two point boundary value problems ( bvps ) . it utilizes a numerically generated approximation to the bvp fundamental solution and green s function and thus can be applied to stable bvps whose initial va... | we present a computer assisted method for generating existence proofs and a posteriori error bounds for solutions to two point boundary value problems ( bvps ) . all truncation errors are accounted for and , if combined with interval arithmetic to bound the rounding errors , the computer generated results are mathemati... |
0811.2042 | i | the antiferromagnetic ising model on the triangular lattice is of long - standing interest since it provides a canonical example of geometric frustration : it is topologically impossible to simultaneously minimize the interaction energies of all three edges of an elementary triangular face . recall that the ising model... | the honeycomb - lattice fully - packed loop model with is equivalent to the zero - temperature triangular - lattice antiferromagnetic ising model , which is fully frustrated and notoriously difficult to simulate . we test this worm algorithm numerically and estimate the dynamic exponent . monte carlo , worm algorithm ,... | we present a markov - chain monte carlo algorithm of _ worm _ type that correctly simulates the fully - packed loop model with on the honeycomb lattice , and we prove that it is ergodic and has uniform stationary distribution . the honeycomb - lattice fully - packed loop model with is equivalent to the zero - temperatu... |
0811.2042 | c | we have formulated a worm algorithm that correctly simulates the fpl model on the honeycomb lattice when @xmath0 . furthermore , we have rigorously proved its validity by showing that the corresponding markov chain is irreducible and has uniform stationary distribution . using standard duality relations this algorithm ... | we present a markov - chain monte carlo algorithm of _ worm _ type that correctly simulates the fully - packed loop model with on the honeycomb lattice , and we prove that it is ergodic and has uniform stationary distribution . we also measure several static quantities of interest , including loop - length and face - s... | we present a markov - chain monte carlo algorithm of _ worm _ type that correctly simulates the fully - packed loop model with on the honeycomb lattice , and we prove that it is ergodic and has uniform stationary distribution . the honeycomb - lattice fully - packed loop model with is equivalent to the zero - temperatu... |
1303.5958 | i | the straight skeleton of a polygon @xmath8 is a straight line graph embedded in @xmath8 , formed by the traces of the vertices of @xmath8 when it is shrunk , each edge moving at the same speed and remaining parallel to its original position . ( see [ fig : mgdef ] . ) .3 , title="fig : " ] .3 , title="fig : " ] ... | we present a new algorithm for computing motorcycle graphs that runs in time for any , improving on all previously known algorithms . the main application of this result is to computing the straight skeleton of a polygon . if all input coordinates are-bit rational numbers , we can compute the straight skeleton of a ( p... | we present a new algorithm for computing motorcycle graphs that runs in time for any , improving on all previously known algorithms . the main application of this result is to computing the straight skeleton of a polygon . it allows us to compute the straight skeleton of a non - degenerate polygon with holes in expecte... |
1204.2841 | i | the basic task of regression analysis the estimation of values of an unknown , sufficiently smooth function @xmath0 of one or several real arguments , given a finite amount of possibly noisy data occurs pervasively in many kinds of quantitative scientific research . most existing approaches to this task can roughly b... | we present a nonparametric method for estimating the value and several derivatives of an unknown , sufficiently smooth real - valued function of real - valued arguments from a finite sample of points , where both the function arguments and the corresponding values are known only up to measurement errors having some ass... | we present a nonparametric method for estimating the value and several derivatives of an unknown , sufficiently smooth real - valued function of real - valued arguments from a finite sample of points , where both the function arguments and the corresponding values are known only up to measurement errors having some ass... |
astro-ph0210611 | i | astrophysical structure formation and the dynamics of astrophysical systems involve nonlinear gas dynamical processes which can not be modeled analytically but require numerical methods . one would like to address the challenging problem of star formation and how this process produces planetary systems . observations o... | we present a pedagogical review of some of the methods employed in eulerian computational fluid dynamics ( cfd ) . the nonlinear , second - order accurate total variation diminishing ( tvd ) approach provides high resolution capturing of shocks and prevents unphysical oscillations . we review the relaxing tvd scheme , ... | we present a pedagogical review of some of the methods employed in eulerian computational fluid dynamics ( cfd ) . fluid mechanics is governed by the euler equations , which are conservation laws for mass , momentum , and energy . the standard approach to eulerian cfd is to divide space into finite volumes or cells and... |
1703.07485 | i | thermonuclear ( type - i ) bursts arise from unstable ignition of accreted fuel ( typically mixed hydrogen and helium ) on the surface of accreting neutron stars in low - mass binary systems . such events are of high priority for observers , as they provide information about the fuel composition , accretion rate , and ... | we present a sample of observations of thermonuclear ( type - i ) x - ray bursts , selected for comparison with numerical models . provided are examples of four distinct cases of thermonuclear ignition : he - ignition in mixed h / he fuel ( case 1 of * ? ? ? * ) ; he - ignition in pure he fuel , following exhaustion of... | we present a sample of observations of thermonuclear ( type - i ) x - ray bursts , selected for comparison with numerical models . provided are examples of four distinct cases of thermonuclear ignition : he - ignition in mixed h / he fuel ( case 1 of * ? ? ? * ) ; he - ignition in pure he fuel , following exhaustion of... |
astro-ph0410748 | r | we made four simulations of infalling clouds and used the @xcite monte carlo radiative transfer model to extract hco@xmath1 ( ) and hco@xmath1 ( ) line profiles from those simulations . in this section we will discuss how effective our analytic models are at deriving the input velocities in those simulation , quantif... | we present a study of analytic models of starless cores whose line profiles have `` infall asymmetry , '' or blue - skewed shapes indicative of contracting motions . we compare the ability of two types of analytical radiative transfer models to reproduce the line profiles and infall speeds of centrally condensed starle... | we present a study of analytic models of starless cores whose line profiles have `` infall asymmetry , '' or blue - skewed shapes indicative of contracting motions . we compare the ability of two types of analytical radiative transfer models to reproduce the line profiles and infall speeds of centrally condensed starle... |
astro-ph0410748 | c | we have shown that analytic radiative transfer models are effective at estimating the infall velocities of contracting clouds from the blue - asymmetric line profiles of species of moderate optical depth in the region of collapse . the models provide good velocity estimates with few assumptions . the greatest advantage... | the fits are most accurate when the line has a brightness temperature greater than 3 k. our most accurate models tend to reproduce not only the line profile shape , but also match the excitation conditions along the line of sight . a better match to the line profile shape does not necessarily imply a better match to t... | we present a study of analytic models of starless cores whose line profiles have `` infall asymmetry , '' or blue - skewed shapes indicative of contracting motions . we compare the ability of two types of analytical radiative transfer models to reproduce the line profiles and infall speeds of centrally condensed starle... |
1212.1859 | c | we have calculated the ratios of the inner planet radius to the outer planet radius for each unique pair of planets within a system ( @xmath35 ) , and the cumulative fraction distribution is displayed in figure [ ratiocfrac - fig ] . if there were no preference for the ordering of planet sizes , the chance that a give... | no such size location correlation is seen for pairs of planets when both planets are smaller than neptune . specifically , if at least one planet in a planet - pair has a radius of , of the planet pairs have the inner planet smaller than the outer planet , while no preferred sequential ordering of the planets is obser... | we present a study of the relative sizes of planets within the multiple candidate systems discovered with the mission . we have compared the size of each planet to the size of every other planet within a given planetary system after correcting the sample for detection and geometric biases . we find that for planet - pa... |
1212.1859 | i | we have performed a study of the relative sizes of planets within the multiple candidate systems using the @xmath0 planetary candidate list @xcite . for each multiple planet system , we have compared the radius of each planet to the radius of every other planet within a planetary system , after correcting for detection... | we present a study of the relative sizes of planets within the multiple candidate systems discovered with the mission . we have compared the size of each planet to the size of every other planet within a given planetary system after correcting the sample for detection and geometric biases . we find that for planet - pa... | we present a study of the relative sizes of planets within the multiple candidate systems discovered with the mission . we have compared the size of each planet to the size of every other planet within a given planetary system after correcting the sample for detection and geometric biases . we find that for planet - pa... |
astro-ph0210101 | c | we have conducted a positional correlation between the kpno international spectroscopic survey and the rosat all - sky survey databases . there are 18 non - spurious matches in total , 72% ( 13 ) of which are spectroscopically identified as seyfert 1 objects using follow - up spectral observations . accurate , high - r... | we present a study of the x - ray properties of a volume - limited sample of optically selected emission - line galaxies . the sample is derived from a correlation between the kpno international spectroscopic survey ( kiss ) , an-selected objective - prism survey of agns and starbursting galaxies , and the rosat all - ... | we present a study of the x - ray properties of a volume - limited sample of optically selected emission - line galaxies . the sample is derived from a correlation between the kpno international spectroscopic survey ( kiss ) , an-selected objective - prism survey of agns and starbursting galaxies , and the rosat all - ... |
1204.0785 | r | by fitting seds to every pixel , we have created maps of dust surface density , temperature , @xmath1 and gas - to - dust ratio which are shown in figure [ fig : sed - maps ] ( for details on how the gas surface density is calculated see section [ sec : radgd ] ) . the dust surface density distribution , un - surprisin... | the average is.9 , in good agreement with values determined for the milky way ( mw ) . however , in contrast to the mw , we find significant radial variations in , which increases from 1.9 at 10kpc to.5 at a radius of 3.1kpc and then decreases to 1.7 in the center . the dust temperature is fairly constant in the 10kpc ... | we present an analysis of the dust and gas in andromeda , using _ herschel _ images sampling the entire far - infrared peak . we fit a modified - blackbody model to quasi - independent pixels with spatial resolution ofpc and find that a variable dust - emissivity index ( ) is required to fit the data . we find no sign... |
1204.0785 | c | recent studies by @xcite and @xcite have used _ herschel _ colors to confirm previous works ( e.g. , * ? ? ? * ; * ? ? ? * ) that emission from dust in nearby galaxies at wavelengths longer than 160 is mostly from dust heated by the general stellar population . these authors conclude that at wavelengths shorter than ... | we show that the gas - to - dust ratio varies radially , increasing from in the center to in the star - forming ring at 10kpc , consistent with the metallicity gradient . in the 10kpc ring within 3.1kpc we find the dust temperature is highly correlated with the 3.6 flux , suggesting the general stellar population in t... | we present an analysis of the dust and gas in andromeda , using _ herschel _ images sampling the entire far - infrared peak . we fit a modified - blackbody model to quasi - independent pixels with spatial resolution ofpc and find that a variable dust - emissivity index ( ) is required to fit the data . we find no sign... |
1204.0785 | c | in this paper we present the results of an analysis of dust and gas in andromeda using new _ herschel _ observations from the helga survey . we have @xmath04000 independent pixels with observations in the range of 70500 . we find the following results : 1 . we find that a variable dust emissivity index , @xmath1 , i... | we present an analysis of the dust and gas in andromeda , using _ herschel we fit a modified - blackbody model to quasi - independent pixels with spatial resolution ofpc and find that a variable dust - emissivity index ( ) is required to fit the data . we find no evidence for ` dark gas ' in m31 in contrast to recent r... | we present an analysis of the dust and gas in andromeda , using _ herschel _ images sampling the entire far - infrared peak . we fit a modified - blackbody model to quasi - independent pixels with spatial resolution ofpc and find that a variable dust - emissivity index ( ) is required to fit the data . we find no sign... |
astro-ph0504503 | i | deep x - ray surveys have progressively resolved an increasing fraction of the soft x - ray background ( xrb ) , into faint point - like sources . most recently , the ultra - deep _ chandra _ surveys ( @xcite , @xcite ) , have resolved over @xmath8 of the 0.52 kev xrb . source counts have been measured in these fields ... | we present an analysis of the x - ray properties of sources detected in thexmm-_newton _ deep ( 200ks ) field . in order to constrain the absorbed agn population , we have tested the simplest form of the unified scheme , whereby the intrinsic luminosity function of absorbed agn is set to be the same as that of their un... | we present an analysis of the x - ray properties of sources detected in thexmm-_newton _ deep ( 200ks ) field . in order to constrain the absorbed agn population , we use extensive monte carlo simulations to directly compare the x - ray colours of observed sources with those predicted by several model distributions . i... |
astro-ph0504503 | m | we have devised a monte carlo simulation technique which allows direct comparison of the pattern of x - ray colours produced by agn absorption models , with the pattern seen in the @xmath0sample . for this , we have extended the xmm-_newton _ imaging simulation method of @xcite , to a multi - band approach . we model t... | we use extensive monte carlo simulations to directly compare the x - ray colours of observed sources with those predicted by several model distributions . in particular , we have carried out our comparisons over the entire 0.210 kev energy range of the xmm-_newton _ cameras , making our analysis sensitive to a large ra... | we present an analysis of the x - ray properties of sources detected in thexmm-_newton _ deep ( 200ks ) field . in order to constrain the absorbed agn population , we use extensive monte carlo simulations to directly compare the x - ray colours of observed sources with those predicted by several model distributions . i... |
astro-ph0504503 | r | sample . the levels of the contours are set such that they include @xmath5 ( short dash ) , @xmath158 ( long dash ) , and @xmath8 ( solid line ) of the smoothed source distribution , and were generated in the same way as for fig . [ colour_nh_ranges ] . typical sizes of @xmath137 , @xmath138 , and @xmath139 are shown w... | of the tested distributions , the best fitting model has the fraction of agn with absorbing column , proportional to ( log) . we find that a luminosity dependent density evolution luminosity function reproduces poorly the 0.52 kev source counts seen in thefield . the tested synthesis models predict that around 16% of t... | we present an analysis of the x - ray properties of sources detected in thexmm-_newton _ deep ( 200ks ) field . in order to constrain the absorbed agn population , we use extensive monte carlo simulations to directly compare the x - ray colours of observed sources with those predicted by several model distributions . i... |
1406.0538 | i | carbon - enhanced metal - poor ( cemp ) stars are a subset of metal - poor ( mp ; [ fe / h ] = @xmath6 , where @xmath7 is the number density of atoms of a given element , and the indices refer to the star ( @xmath8 ) and the sun ( @xmath9).]@xmath101.0 , e.g. , * ? ? ? * ; * ? ? ? * ) and very metal - poor ( vmp ; [ fe... | we present an elemental - abundance analysis , in the near - ultraviolet ( nuv ) spectral range , for the extremely metal - poor star , a 9th magnitude subgiant with [ fe / h ] and enhanced carbon , based on data acquired with the space telescope imaging spectrograph on the _ hubble space telescope_. this star is the b... | we present an elemental - abundance analysis , in the near - ultraviolet ( nuv ) spectral range , for the extremely metal - poor star , a 9th magnitude subgiant with [ fe / h ] and enhanced carbon , based on data acquired with the space telescope imaging spectrograph on the _ hubble space telescope_. this star is the b... |
1406.0538 | c | @xcite have discussed in detail the importance of the low upper limit they derived for be in the optical spectrum of , which we have now lowered by about a factor of three , to @xmath412.3 , based on our nuv _ hst_/stis measurements . our estimate of the upper limit on b ( @xmath53 ) , is also of significance , since t... | the boron upper limit we obtain for , , the first such measurement for a cemp star , is the lowest yet found for very and extremely metal - poor stars . in addition , we obtain even lower upper limits on the abundances of beryllium , , and lead , ( [ pb / fe] ) , than those reported by previous analyses in the optical ... | we present an elemental - abundance analysis , in the near - ultraviolet ( nuv ) spectral range , for the extremely metal - poor star , a 9th magnitude subgiant with [ fe / h ] and enhanced carbon , based on data acquired with the space telescope imaging spectrograph on the _ hubble space telescope_. this star is the b... |
0704.1826 | c | in conclusion , we have performed an extensive analysis of squark and gaugino hadroproduction and decays in non - minimal flavour violating supersymmetry . within the super - ckm basis , we have taken into account the possible misalignment of quark and squark rotations and computed all squared helicity amplitudes for t... | we present an extensive analysis of squark and gaugino hadroproduction and decays in non - minimal flavour violating supersymmetry . we employ the so - called super - ckm basis to define the possible misalignment of quark and squark rotations , and we use generalized ( possibly complex ) charges to define the mutual co... | we present an extensive analysis of squark and gaugino hadroproduction and decays in non - minimal flavour violating supersymmetry . we employ the so - called super - ckm basis to define the possible misalignment of quark and squark rotations , and we use generalized ( possibly complex ) charges to define the mutual co... |
astro-ph0703777 | i | with the launch of the _ spitzer _ space telescope , identification of embedded young stellar objects ( ysos ) from their infrared excess emission at mid - infrared wavelengths ( @xmath4 using irac , the infrared array camera , and at 24@xmath3 m , using mips , the multiband imaging photometer ) has been facilitated by... | we present an independent estimate of the interstellar extinction law for the _ spitzer _ irac bands as well as a first attempt at extending the law to the 24 mips band . the source data for these measurements are observations of five nearby star - forming regions : the orion a cloud , ngc 2068/71 , ngc 2024/23 , serp... | we present an independent estimate of the interstellar extinction law for the _ spitzer _ irac bands as well as a first attempt at extending the law to the 24 mips band . the source data for these measurements are observations of five nearby star - forming regions : the orion a cloud , ngc 2068/71 , ngc 2024/23 , serp... |
astro-ph0703777 | r | the slopes of the linear fits to the @xmath33 vs. @xmath34 $ ] color - color diagrams for our five clusters are listed in table [ slopes ] and plotted in figures [ ngc2024_red ] , [ ngc2068_red ] , [ serp_red ] , [ oph_red ] , and [ oriona_red ] . it is apparent that our derived slopes ( color excess ratios ) are... | the extinction laws are similar at all wavelengths and differ systematically from a previous determination of the extinction law , which was dominated by the diffuse ism , derived for the irac bands . this difference could be due to the difference in the dust properties of the dense molecular clouds observed here and t... | we present an independent estimate of the interstellar extinction law for the _ spitzer _ irac bands as well as a first attempt at extending the law to the 24 mips band . the source data for these measurements are observations of five nearby star - forming regions : the orion a cloud , ngc 2068/71 , ngc 2024/23 , serp... |
1002.0881 | r | narrow - band images of ngc7354 were obtained on 1997 july 24 with the nordic optical telescope ( not ) and the hirac camera equiped with a loral cdd of 2048@xmath142048 pixels and a plate scale of @xmath15 pixel@xmath12 . two narrow - band filters were used : [ ] @xmath1 ( @xmath16 ) and h@xmath0 ( @xmath16 ) . the ex... | abundance values show slight internal variations but most of them are within the estimated uncertainties . in general , radio continuum data are consistent with optically thin thermal emission . mean physical parameters derived from the radio emission are electron density and(hii) . our observations and model show e... | we present an observational study of the planetary nebula ( pn ) ngc7354 consisting of narrow band h and [ ] imaging as well as low and high dispersion long - slit spectroscopy and vla - d radio continuum . according to our imaging and spectroscopic data , ngc7354 has four main structures : a quite round outer shell an... |
1002.0881 | c | as we have described , ngc7354 shows four different structures : two large scale structures , the outer and the inner shells , the last having two polar caps located on its symmetry axis ; a number of low - ionization bright knots lying about the equatorial plane , and two jet - like features located close to the north... | , ngc7354 has four main structures : a quite round outer shell and an elliptical inner shell , a collection of low - excitation bright knots roughly concentrated on the equatorial region of the nebula and two asymmetrical jet - like features , not aligned neither with the shells axes , nor with each other . we have obt... | we present an observational study of the planetary nebula ( pn ) ngc7354 consisting of narrow band h and [ ] imaging as well as low and high dispersion long - slit spectroscopy and vla - d radio continuum . according to our imaging and spectroscopic data , ngc7354 has four main structures : a quite round outer shell an... |
1002.0881 | c | we have carried out a detailed morphological and kinematical analysis of the planetary nebula ngc7354 . in addition , we have derived the physical conditions and elemental abundances in 21 regions of the nebula . the main conclusionas of this work can be sumarized as follows . physical parameters of all the different s... | the local extinction coefficient shows an increasing gradient from south to north and a decreasing gradient from east to west consistent with the number of equatorial bright knots present in each direction . abundance values are in good agreement with the ones expected for pne . our shape model includes several small s... | we present an observational study of the planetary nebula ( pn ) ngc7354 consisting of narrow band h and [ ] imaging as well as low and high dispersion long - slit spectroscopy and vla - d radio continuum . according to our imaging and spectroscopic data , ngc7354 has four main structures : a quite round outer shell an... |
1407.4628 | i | it is well established that the properties of galaxies are correlated with the environment ( e.g. * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? * ; * ? ? ? . at @xmath9 galaxy populations in rich clusters are dominated by ellipticals , s0s and at lower masses dwarf ellipticals ( des ) ... | we present an overview of a multi - wavelength survey of the shapley supercluster ( ssc ; z.05 ) covering a contiguous area of 260mpc including the supercluster core . we derive the galaxy density across the whole area , demonstrating that all structures within this area are embedded in a single network of clusters , g... | we present an overview of a multi - wavelength survey of the shapley supercluster ( ssc ; z.05 ) covering a contiguous area of 260mpc including the supercluster core . the project main aim is to quantify the influence of cluster - scale mass assembly on galaxy evolution in one of the most massive structures in the loca... |
1407.4628 | i | the shapley supercluster survey ( shass ) aims to assess the role of cluster - scale mass assembly on galaxy evolution searching for possible connections between the properties of the cosmological structures ( density , dynamical status , hot - gas content , dark and luminous matter distribution ) and those of the asso... | the project main aim is to quantify the influence of cluster - scale mass assembly on galaxy evolution in one of the most massive structures in the local universe . the shapley supercluster survey ( shass ) includes nine abell clusters ( a3552 , a3554 , a3556 , a3558 , a3559 , a3560 , a3562 , as0724 , as0726 ) and two ... | we present an overview of a multi - wavelength survey of the shapley supercluster ( ssc ; z.05 ) covering a contiguous area of 260mpc including the supercluster core . the project main aim is to quantify the influence of cluster - scale mass assembly on galaxy evolution in one of the most massive structures in the loca... |
0903.4479 | i | the present main belt asteroid size distribution provides important constraints on models of the original size distribution of planetesimals and their collisional evolution . the size - frequency distribution , main belt asteroid scale height , and albedo variations extant in a large , well - sampled population are als... | we present analysis of the asteroid surface density distribution of main belt asteroids ( mean perihelion au ) in five ecliptic latitude fields , , derived from deep _ large binocular telescope _ ( lbt )band ( 85% completeness limit mag ) and _ spitzer space telescope _ we discovered 58 new asteroids in the optical s... | we present analysis of the asteroid surface density distribution of main belt asteroids ( mean perihelion au ) in five ecliptic latitude fields , , derived from deep _ large binocular telescope _ ( lbt )band ( 85% completeness limit mag ) and _ spitzer space telescope _ irac 8.0 ( 80% completeness limitjy ) fields ... |
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