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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Galaxy and Mass Assembly (GAMA): Ugriz galaxy luminosity functions
Monthly Notices of the Royal Astronomical Society, Volume 420, No. 2, Year 2012
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Description
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≃ 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. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.
Authors & Co-Authors
Loveday, Jon N.
United Kingdom, Brighton
University of Sussex
Norberg, Peder R.
United Kingdom, Edinburgh
The University of Edinburgh
United Kingdom, Durham
Durham University
Baldry, Ivan K.
United Kingdom, Liverpool
Liverpool John Moores University
Driver, Simon P.
United Kingdom, St Andrews
University of st Andrews
Australia, Perth
International Centre for Radio Astronomy Research
Hopkins, Andrew M.
Australia
Australian Astronomical Observatory
Peacock, John A.
United Kingdom, Edinburgh
The University of Edinburgh
Bamford, Steven P.
United Kingdom, Nottingham
University of Nottingham
Liske, Jochen
Germany, Garching Bei Munchen
European Southern Observatory
Bland-Hawthorn, Joss
Australia, Sydney
The University of Sydney
Brough, Sarah
Australia
Australian Astronomical Observatory
Brown, Michael J.I.
Australia, Clayton
Monash University
Cameron, Ewan
Switzerland, Zurich
Eth Zürich
Conselice, Christopher J.
United Kingdom, Nottingham
University of Nottingham
Croom, Scott M.
Australia, Sydney
The University of Sydney
Frenk, Carlos S.
United Kingdom, Durham
Durham University
Gunawardhana, Madusha L.P.
Australia, Sydney
The University of Sydney
Hill, David T.
United Kingdom, St Andrews
University of st Andrews
Jones, Daniel Heath
Australia, Clayton
Monash University
Kelvin, Lee S.
United Kingdom, St Andrews
University of st Andrews
Kuijken, Konrad H.
Netherlands, Leiden
Universiteit Leiden
Nichol, Robert C.
United Kingdom, Portsmouth
University of Portsmouth
Parkinson, Hannah R.
United Kingdom, Edinburgh
The University of Edinburgh
Phillipps, Steven
United Kingdom, Bristol
University of Bristol
Pimbblet, Kevin A.
Australia, Clayton
Monash University
Popescu, Cristina C.
United Kingdom, Preston
University of Central Lancashire
Prescott, Matthew
United Kingdom, Liverpool
Liverpool John Moores University
Robotham, Aaron S.G.
United Kingdom, St Andrews
University of st Andrews
Sharp, Rob G.
Australia, Canberra
The Australian National University
Sutherland, William J.
United Kingdom, London
Queen Mary University of London
Taylor, Edward N.
Australia, Sydney
The University of Sydney
Thomas, Daniel B.
United Kingdom, Portsmouth
University of Portsmouth
Tuffs, Richard J.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
van Kampen, Eelco V.
Germany, Garching Bei Munchen
European Southern Observatory
Wijesinghe, Dinuka B.
Australia, Sydney
The University of Sydney
Statistics
Citations: 147
Authors: 34
Affiliations: 19
Identifiers
Doi:
10.1111/j.1365-2966.2011.20111.x
ISSN:
13652966