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Galaxy and Mass Assembly (GAMA): maximum likelihood determination of the luminosity function and its evolution

Loveday, J, Norberg, P, Baldry, IK, Bland-Hawthorn, J, Brough, S, Brown, MJI, Driver, SP, Kelvin, LS and Phillipps, S (2015) Galaxy and Mass Assembly (GAMA): maximum likelihood determination of the luminosity function and its evolution. Monthly Notices of the Royal Astronomical Society, 451 (2). pp. 1540-1552. ISSN 0035-8711

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We describe modifications to the joint stepwise maximum likelihood method of Cole (2011) in order to simultaneously fit the GAMA-II galaxy luminosity function (LF), corrected for radial density variations, and its evolution with redshift. The whole sample is reasonably well-fit with luminosity (Qe) and density (Pe) evolution parameters Qe, Pe = 1.0, 1.0 but with significant degeneracies characterized by Qe = 1.4 - 0.4Pe. Blue galaxies exhibit larger luminosity density evolution than red galaxies, as expected. We present the evolution-corrected r-band LF for the whole sample and for blue and red sub-samples, using both Petrosian and Sersic magnitudes. Petrosian magnitudes miss a substantial fraction of the flux of de Vaucouleurs profile galaxies: the Sersic LF is substantially higher than the Petrosian LF at the bright end.

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record MNRAS (August 01, 2015) 451 (2): 1540-1552. is available online at: http://dx.doi.org/10.1093/mnras/stv1013
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
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Date Deposited: 26 Oct 2015 14:48
Last Modified: 04 Sep 2021 14:08
URI: https://researchonline.ljmu.ac.uk/id/eprint/1720

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