The Overdensities of Galaxy Environments as a Function of Luminosity and Color | Zendy

David W. Hogg | Zendy; Michael R. Blanton | Zendy; Daniel J. Eisenstein | Zendy; James E. Gunn | Zendy; David J. Schlegel | Zendy; Idit Zehavi | Zendy; Neta A. Bahcall | Zendy; J. Brinkmann | Zendy; István Csabai | Zendy; Donald P. Schneider | Zendy; David H. Weinberg | Zendy; Donald G. York | Zendy

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The Overdensities of Galaxy Environments as a Function of Luminosity and Color

Author(s) -

David W. Hogg,

Michael R. Blanton,

Daniel J. Eisenstein,

James E. Gunn,

David J. Schlegel,

Idit Zehavi,

Neta A. Bahcall,

J. Brinkmann,

István Csabai,

Donald P. Schneider,

David H. Weinberg,

Donald G. York

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/374238

Subject(s) - physics , astrophysics , luminosity function , luminosity , sky , galaxy , astronomy , luminous infrared galaxy , spiral galaxy

We study the mean environments of galaxies in the Sloan Digital Sky Survey asa function of rest-frame luminosity and color. Overdensities in galaxy numberare estimated in $8 h^{-1} \mathrm{Mpc}$ and $1 h^{-1} \mathrm{Mpc}$ spherescentered on $125,000$ galaxies taken from the SDSS spectroscopic sample. Wefind that, at constant color, overdensity is independent of luminosity forgalaxies with the blue colors of spirals. This suggests that, at fixedstar-formation history, spiral-galaxy mass is a very weak function ofenvironment. Overdensity does depend on luminosity for galaxies with the redcolors of early types; both low-luminosity and high-luminosity red galaxies arefound to be in highly overdense regions.Comment: submitted to ApJ

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