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Size distribution of galaxies in SDSS DR7: weak dependence on halo environment
Zhang YouCai1; Yang XiaoHu2
2019
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume19Issue:1
AbstractUsing a sample of galaxies selected from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7) and a catalog of bulge-disk decompositions, we study how the size distribution of galaxies depends on the intrinsic properties of galaxies, such as concentration, morphology, specific star formation rate (sSFR), and bulge fraction, and on the large-scale environments in the context of central/satellite decomposition, halo environment, the cosmic web: cluster, filament, sheet and void, as well as galaxy number density. We find that there is a strong dependence of the luminosity- or mass-size relation on the galaxy concentration, morphology, sSFR and bulge fraction. Compared with late-type (spiral) galaxies, there is a clear trend of smaller sizes and steeper slope for early-type (elliptical) galaxies. Similarly, galaxies with a high bulge fraction have smaller sizes and steeper slopes than those with a low bulge fraction. Fitting formulae of the average luminosity- and mass-size relations are provided for galaxies with these different intrinsic properties. Examining galaxies in terms of their large scale environments, we find that the masssize relation has some weak dependence on the halo mass and central/satellite segregation for galaxies within mass range 9.0 <= log M-* <= 10.5, where satellites or galaxies in more massive halos have slightly smaller sizes than their counterparts, while the cosmic web and local number density dependence of the mass-size relation is almost negligible.
KeywordDIGITAL SKY SURVEY GREATER-THAN 2 MASS-SIZE SCALING RELATIONS LUMINOSITY FUNCTION DOMINATED GALAXIES CLUSTER GALAXIES ANGULAR-MOMENTUM DISK GALAXIES EVOLUTION large-scale structure of universe methods: statistical cosmology: observations
Language英语
Funding Project[National Basic Research Program of China (973 Program)] ; [National Natural Science Foundation of China] ; [High Performance Computing Resource in the Core Facility for Advanced Research Computing at Shanghai Astronomical Observatory] ; [Alfred P. Sloan Foundation] ; [U.S. Department of Energy Office of Science] ; [Center for High-Performance Computing at the University of Utah] ; [Brazilian Participation Group] ; [Carnegie Institution for Science] ; [Carnegie Mellon University] ; [Chilean Participation Group] ; [French Participation Group] ; [Harvard-Smithsonian Center for Astrophysics] ; [Instituto de Astrofisica de Canarias] ; [Johns Hopkins University] ; [Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo] ; [Lawrence Berkeley National Laboratory] ; [Leibniz Institut fur Astrophysik Potsdam (AIP)] ; [Max-Planck-Institut fur Astronomie (MPIA Heidelberg)] ; [Max-Planck-Institut fur Astrophysik (MPA Garching)] ; [Max-Planck-Institut fur Extraterrestrische Physik (MPE)] ; [National Astronomical Observatories of China] ; [New Mexico State University] ; [New York University] ; [University of Notre Dame] ; [Observatorio Nacional/MCTI] ; [Ohio State University] ; [Pennsylvania State University] ; [Shanghai Astronomical Observatory] ; [United Kingdom Participation Group] ; [Universidad Nacional Autonoma de Mexico] ; [University of Arizona] ; [University of Colorado Boulder] ; [University of Oxford] ; [University of Portsmouth] ; [University of Utah] ; [University of Virginia] ; [University of Washington] ; [University of Wisconsin] ; [Vanderbilt University] ; [Yale University]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/72846
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.上海交通大学
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang YouCai,Yang XiaoHu. Size distribution of galaxies in SDSS DR7: weak dependence on halo environment[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(1).
APA Zhang YouCai,&Yang XiaoHu.(2019).Size distribution of galaxies in SDSS DR7: weak dependence on halo environment.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(1).
MLA Zhang YouCai,et al."Size distribution of galaxies in SDSS DR7: weak dependence on halo environment".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.1(2019).
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