The overdensities of galaxy environments as a function of luminosity and color

被引：257
作者：
Hogg, DW
Blanton, MR
Eisenstein, DJ
Gunn, JE
Schlegel, DJ
Zehavi, I
Bahcall, NA
Brinkmann, J
Csabai, I
Schneider, DP
Weinberg, DH
York, DG
机构：
[1] NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA
[2] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
[3] Princeton Univ Observ, Princeton, NJ 08544 USA
[4] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[5] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
[6] Apache Point Observ, Sunspot, NM 88349 USA
[7] Eotvos Lorand Univ, Dept Phys, H-1518 Budapest, Hungary
[8] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[9] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
[10] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
来源：
ASTROPHYSICAL JOURNAL | 2003年 / 585卷 / 01期
关键词：
galaxies : clusters : general; galaxies : fundamental parameters; galaxies : statistics; large-scale structure of universe;
D O I：
10.1086/374238
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the mean environments of galaxies in the Sloan Digital Sky Survey (SDSS) as a function of rest-frame luminosity and color. Overdensities in galaxy number are estimated in 8 and 1 h(-1) Mpc spheres centered on 115,000 galaxies taken from the SDSS spectroscopic sample. We find that, at constant color, overdensity is independent of luminosity for galaxies with the blue colors of spirals. This suggests that at fixed star formation history, spiral-galaxy mass is a very weak function of environment. Overdensity does depend on luminosity for galaxies with the red colors of early types; both low-luminosity and high-luminosity red galaxies are found to be in highly overdense regions.
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页码：L5 / L9
页数：5
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