MNRAS-2015-Loveday-1540-52.pdf (833.04 kB)
Galaxy and Mass Assembly (GAMA): maximum-likelihood determination of the luminosity function and its evolution
journal contribution
posted on 2023-06-08, 21:15 authored by Jonathan LovedayJonathan Loveday, P Norberg, I K Baldry, J Bland-Hawthorn, S Brough, M J I Brown, S P Driver, L S Kelvin, S PhillippsWe describe modifications to the joint stepwise maximum-likelihood method of Cole in order to simultaneously fit the Galaxy and Mass Assembly II galaxy luminosity function (LF), corrected for radial density variations, and its evolution with redshift. The whole sample is reasonably well fitted 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 subsamples, using both Petrosian and Sérsic magnitudes. Petrosian magnitudes miss a substantial fraction of the flux of de Vaucouleurs profile galaxies: the Sérsic LF is substantially higher than the Petrosian LF at the bright end.
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- Published
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- Published version
Journal
Monthly Notices of the Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
Issue
2Volume
451Page range
1540-1552Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2015-06-24First Open Access (FOA) Date
2015-06-24First Compliant Deposit (FCD) Date
2015-06-24Usage metrics
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