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

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

doi:10.1086/374238

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

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

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Abstract

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.

Original language	English (US)
Pages (from-to)	L5-L9
Journal	Astrophysical Journal
Volume	585
Issue number	1 II
DOIs	https://doi.org/10.1086/374238
State	Published - Mar 1 2003

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/374238

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title = "The overdensities of galaxy environments as a function of luminosity and color",

abstract = "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.",

author = "Hogg, {David W.} and Blanton, {Michael R.} and Eisenstein, {Daniel J.} and Gunn, {James E.} and Schlegel, {David J.} and Idit Zehavi and Bahcall, {Neta A.} and Jon Brinkmann and Istvan Csabai and Schneider, {Donald P.} and Weinberg, {David H.} and York, {Donald G.}",

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TY - JOUR

T1 - The overdensities of galaxy environments as a function of luminosity and color

AU - Hogg, David W.

AU - Blanton, Michael R.

AU - Eisenstein, Daniel J.

AU - Gunn, James E.

AU - Schlegel, David J.

AU - Zehavi, Idit

AU - Bahcall, Neta A.

AU - Brinkmann, Jon

AU - Csabai, Istvan

AU - Schneider, Donald P.

AU - Weinberg, David H.

AU - York, Donald G.

PY - 2003/3/1

Y1 - 2003/3/1

N2 - 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.

AB - 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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SP - L5-L9

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

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

Abstract

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