期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 420, 期 2, 页码 1239-1262出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2011.20111.x
关键词
galaxies: evolution; galaxies: luminosity function, mass function; galaxies: statistics
资金
- Science and Technology Facilities Council (STFC) [ST/F002858/1, ST/I000976/1]
- Royal Society URF
- ERC StG [DEGAS-259586]
- STFC (UK)
- Astrophysical Research Consortium (ARC) (Australia)
- AAO
- Alfred P. Sloan Foundation
- American Museum of Natural History
- Astrophysical Institute Potsdam
- University of Basel
- University of Cambridge
- Case Western Reserve University
- University of Chicago
- Drexel University
- Fermilab
- Institute for Advanced Study
- Japan Participation Group
- Johns Hopkins University
- Joint Institute for Nuclear Astrophysics
- Kavli Institute for Particle Astrophysics and Cosmology
- Korean Scientist Group
- Chinese Academy of Sciences (LAMOST)
- Los Alamos National Laboratory
- Max Planck Institute for Astronomy
- Max Planck Institute for Astrophysics
- New Mexico State University
- Ohio State University
- University of Pittsburgh
- University of Portsmouth
- Princeton University
- United States Naval Observatory
- University of Washington
- National Science Foundation
- US Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- Science and Technology Facilities Council [ST/J002291/1, ST/G001995/1, ST/H008578/1, ST/I001204/1, ST/I001166/1, ST/G001979/1, ST/H007156/1, ST/H002391/1, ST/J001465/1, ST/H008519/1, ST/G001987/1, ST/I000976/1, ST/I003088/1, ST/I00162X/1, ST/F002289/1, ST/H00131X/1, ST/J001546/1, ST/K003577/1, ST/F002858/1, ST/I001212/1, PP/E001149/1, ST/J001414/1] Funding Source: researchfish
- STFC [ST/K003577/1, ST/J001465/1, ST/H002391/1, ST/J002291/1, PP/E001149/1, ST/G001987/1, ST/I001166/1, ST/I00162X/1, ST/H008519/1, ST/F002858/1, ST/I001212/1, ST/F002289/1, ST/I001204/1, ST/G001979/1, ST/H007156/1, ST/J001546/1, ST/I000976/1, ST/J001414/1, ST/G001995/1] Funding Source: UKRI
Galaxy and Mass Assembly (GAMA) is a project to study galaxy formation and evolution, combining imaging data from ultraviolet to radio with spectroscopic data from the AAOmega spectrograph on the Anglo-Australian Telescope. Using data from Phase 1 of GAMA, taken over three observing seasons, and correcting for various minor sources of incompleteness, we calculate galaxy luminosity functions (LFs) and their evolution in the ugriz passbands. At low redshift, z < 0.1, we find that blue galaxies, defined according to a magnitude-dependent but non-evolving colour cut, are reasonably well fitted over a range of more than 10 magnitudes by simple Schechter functions in all bands. Red galaxies, and the combined blue plus red sample, require double power-law Schechter functions to fit a dip in their LF faintwards of the characteristic magnitude M* before a steepening faint end. This upturn is at least partly due to dust-reddened disc galaxies. We measure the evolution of the galaxy LF over the redshift range 0.002 < z < 0.5 both by using a parametric fit and by measuring binned LFs in redshift slices. The characteristic luminosity L* is found to increase with redshift in all bands, with red galaxies showing stronger luminosity evolution than blue galaxies. The comoving number density of blue galaxies increases with redshift, while that of red galaxies decreases, consistent with prevailing movement from blue cloud to red sequence. As well as being more numerous at higher redshift, blue galaxies also dominate the overall luminosity density beyond redshifts z similar or equal to 0.2. At lower redshifts, the luminosity density is dominated by red galaxies in the riz bands, and by blue galaxies in u and g.
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