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

J. Loveday; P. Norberg; I.K. Baldry; J. BaldryBland-Hawthorn; S. Brough; M.J.I. Brown; S.P. Driver; L.S. Kelvin; S. Phillipps

doi:10.1093/mnras/stv1013

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

J. Loveday, P. Norberg, I.K. Baldry, J. BaldryBland-Hawthorn, S. Brough, M.J.I. Brown, S.P. Driver, L.S. Kelvin, S. Phillipps

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We 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 (Q_e) and density (P_e) evolution parameters Q_e, P_e ≈ 1.0, 1.0 but with significant degeneracies characterized by Q_e ≈ 1.4 − 0.4P_e. 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.

Original language	English
Pages (from-to)	1540-1552
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	451
Issue number	2
Early online date	5 Jun 2015
DOIs	https://doi.org/10.1093/mnras/stv1013
Publication status	Published - 1 Aug 2015

Keywords

Galaxies: evolution
Galaxies: luminosity function, mass function
Galaxies: statistics

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10.1093/mnras/stv1013

Driver_2015_MNRAS_GAMAMaximum
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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GAMA Data Release 2
Liske, J. (Creator), Baldry, I. K. (Creator), Driver, S. P. (Creator), Tuffs, R. J. (Creator), Alpaslan, M. (Creator), Andrae, E. (Creator), Brough, S. (Creator), Cluver, M. E. (Creator), Grootes, M. W. (Creator), Gunawardhana, M. L. P. (Creator), Kelvin, L. S. (Creator), Loveday, J. (Creator), Robotham, A. S. G. (Creator), Bamford, S. P. (Creator), Bland-Hawthorn, J. (Creator), Brown, M. J. I. (Creator), Drinkwater, M. J. (Creator), Hopkins, A. M. (Creator), Meyer, M. J. (Creator), Norberg, P. (Creator), Peacock, J. A. (Creator), Agius, N. K. (Creator), Andrews, S. K. (Creator), Bauer, A. E. (Creator), Ching, J. H. Y. (Creator), Colles, M. (Creator), Conselice, C. J. (Creator), Croom, S. M. (Creator), Davies, L. J. M. (Creator), De Propris, R. (Creator), Dunne, L. (Creator), Eardley, E. M. (Creator), Ellis, S. (Creator), Foster, C. (Creator), Frenk, C. S. (Creator), Haußler, B. (Creator), Holwerda, B. W. (Creator), Howlett, C. (Creator), Ibarra, H. (Creator), Jarvis, M. J. (Creator), Jones, D. H. (Creator), Kafle, P. R. (Creator), Lacey, C. G. (Creator), Lange, R. (Creator), Lara-Ĺopez, M. A. (Creator), López-Sánchez, Á. R. (Creator), Maddox, S. (Creator), Madore, B. F. (Creator), McNaught-Roberts, T. (Creator), Moffett, A. J. (Creator), Nichol, R. C. (Creator), Owers, M. S. (Creator), Palamara, D. (Creator), Penny, S. J. (Creator), Phillipps, S. (Creator), Pimbblet, K. A. (Creator), Popescu, C. C. (Creator), Prescott, M. (Creator), Proctor, R. (Creator), Sadler, E. M. (Creator), Sansom, A. E. (Creator), Seibert, M. (Creator), Sharp, R. (Creator), Sutherland, W. (Creator), Vazquez-Mata, J. A. (Creator), van Kampen, E. (Creator), Wilkins, S. M. (Creator), Williams, R. (Creator) & Wright, A. H. (Creator), Galaxy And Mass Assembly (GAMA), 11 Sept 2015
http://www.gama-survey.org/dr2/
Dataset

Cite this

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title = "Galaxy and Mass assembly (GAMA): maximum-likelihood determination of the luminosity function and its evolution",

abstract = "We 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 S{\'e}rsic magnitudes. Petrosian magnitudes miss a substantial fraction of the flux of de Vaucouleurs profile galaxies: the S{\'e}rsic LF is substantially higher than the Petrosian LF at the bright end.",

keywords = "Galaxies: evolution, Galaxies: luminosity function, mass function, Galaxies: statistics",

author = "J. Loveday and P. Norberg and I.K. Baldry and J. BaldryBland-Hawthorn and S. Brough and M.J.I. Brown and S.P. Driver and L.S. Kelvin and S. Phillipps",

note = "JL acknowledges support from the Science and Technology Facilities Council (grant number ST/I000976/1) and illuminating discussions with Shaun Cole. PN acknowledges the support of the Royal Society through the award of a University Research Fellowship, the European Research Council, through receipt of a Starting Grant (DEGAS-259586) and the Science and Technology Facilities Council (ST/L00075X/1). ",

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doi = "10.1093/mnras/stv1013",

language = "English",

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pages = "1540--1552",

journal = "Monthly Notices of the Royal Astronomical Society",

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T1 - Galaxy and Mass assembly (GAMA)

T2 - maximum-likelihood determination of the luminosity function and its evolution

AU - Loveday, J.

AU - Norberg, P.

AU - Baldry, I.K.

AU - BaldryBland-Hawthorn, J.

AU - Brough, S.

AU - Brown, M.J.I.

AU - Driver, S.P.

AU - Kelvin, L.S.

AU - Phillipps, S.

N1 - JL acknowledges support from the Science and Technology Facilities Council (grant number ST/I000976/1) and illuminating discussions with Shaun Cole. PN acknowledges the support of the Royal Society through the award of a University Research Fellowship, the European Research Council, through receipt of a Starting Grant (DEGAS-259586) and the Science and Technology Facilities Council (ST/L00075X/1).

PY - 2015/8/1

Y1 - 2015/8/1

N2 - We 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.

AB - We 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.

KW - Galaxies: evolution

KW - Galaxies: luminosity function, mass function

KW - Galaxies: statistics

U2 - 10.1093/mnras/stv1013

DO - 10.1093/mnras/stv1013

M3 - Article

AN - SCOPUS:84938118195

SN - 0035-8711

VL - 451

SP - 1540

EP - 1552

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

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

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Keywords

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Datasets

GAMA Data Release 2

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