GALAXY GROUPS IN THE SDSS DR4. III. THE LUMINOSITY AND STELLAR MASS FUNCTIONS
Open Access
- 3 April 2009
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 695 (2), 900-916
- https://doi.org/10.1088/0004-637x/695/2/900
Abstract
Using a large galaxy group catalog constructed from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4) with an adaptive halo-based group finder, we investigate the luminosity and stellar mass functions for different populations of galaxies (central versus satellite, red versus blue, and galaxies in groups of different masses) and for groups themselves. The conditional stellar mass function (CSMF), which describes the stellar distribution of galaxies in halos of a given mass for central and satellite galaxies can be well modeled with a log-normal distribution and a modified Schechter form, respectively. On average, there are about three times as many central galaxies as satellites. Among the satellite population, there are in general more red galaxies than blue ones. For the central population, the luminosity function is dominated by red galaxies at the massive end, and by blue galaxies at the low-mass end. At the very low mass end (M * 109 h –2 M ☉), however, there is a marked increase in the number of red centrals. We speculate that these galaxies are located close to large halos so that their star formation is truncated by the large-scale environments. The stellar mass function of galaxy groups is well described by a double power law, with a characteristic stellar mass at ~4 × 1010 h –2 M ☉. Finally, we use the observed stellar mass function of central galaxies to constrain the stellar mass-halo mass relation for low-mass halos, and obtain M *,c ∝ M 4.9 h for Mh 1011 h –1 M ☉.Keywords
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This publication has 87 references indexed in Scilit:
- K-Corrections and Filter Transformations in the Ultraviolet, Optical, and Near-InfraredThe Astronomical Journal, 2007
- Percolation Galaxy Groups and Clusters in the SDSS Redshift Survey: Identification, Catalogs, and the Multiplicity FunctionThe Astrophysical Journal Supplement Series, 2006
- The Fourth Data Release of the Sloan Digital Sky SurveyThe Astrophysical Journal Supplement Series, 2006
- Relationship between Environment and the Broadband Optical Properties of Galaxies in the Sloan Digital Sky SurveyThe Astrophysical Journal, 2005
- New York University Value-Added Galaxy Catalog: A Galaxy Catalog Based on New Public SurveysThe Astronomical Journal, 2005
- Quantifying the Bimodal Color‐Magnitude Distribution of GalaxiesThe Astrophysical Journal, 2004
- The Optical and Near‐Infrared Properties of Galaxies. I. Luminosity and Stellar Mass FunctionsThe Astrophysical Journal Supplement Series, 2003
- The Galaxy Luminosity Function and Luminosity Density at Redshiftz= 0.1The Astrophysical Journal, 2003
- Estimating Fixed-Frame Galaxy Magnitudes in the Sloan Digital Sky SurveyThe Astronomical Journal, 2003
- The Halo Occupation Distribution: Toward an Empirical Determination of the Relation between Galaxies and MassThe Astrophysical Journal, 2002