Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 413, Issue 3, Pages 2078-2086Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2011.18285.x
Keywords
galaxies: general; galaxies: haloes; galaxies: statistics
Categories
Funding
- UK Science and Technology Facilities Council
- Alfred P. Sloan Foundation
- National Aeronautics and Space Administration
- National Science Foundation
- US Department of Energy
- Japanese Monbukagakusho
- Max Planck Society
- University of Chicago
- Fermilab
- Institute for Advanced Study
- Japan Participation Group
- Johns Hopkins University
- Korean Scientist Group
- Los Alamos National Laboratory
- Max Planck Institute for Astronomy (MPIA)
- Max Planck Institute for Astrophysics (MPA)
- New Mexico State University
- University of Pittsburgh
- University of Portsmouth
- Princeton University
- United States Naval Observatory
- University of Washington
- STFC [ST/F002335/1, ST/H002774/1, ST/I001204/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H002774/1, ST/F002335/1, ST/I001204/1] Funding Source: researchfish
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We use data from the SDSS to investigate the evolution of the large-scale galaxy bias as a function of luminosity for red galaxies. We carefully consider correlation functions of galaxies selected from both photometric and spectroscopic data, and cross-correlations between them, to obtain multiple measurements of the large-scale bias. We find, for our most robust analyses, a strong increase in bias with luminosity for the most luminous galaxies, an intermediate regime where bias does not evolve strongly over a range of two magnitudes in galaxy luminosity, and no evidence for an upturn in bias for fainter red galaxies. Previous work has found an increase in bias to low luminosities that has been widely interpreted as being caused by a strong preference for red dwarf galaxies to be satellites in the most massive haloes. We can recover such an upturn in bias to faint luminosities if we push our measurements to small scales, and include galaxy clustering measurements along the line of sight, where we expect non-linear effects to be the strongest. The results that we expect to be most robust suggest that the low-luminosity population of red galaxies is not dominated by satellite galaxies occupying the most massive haloes.
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