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

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

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

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

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

56 Citations (Scopus)

Abstract

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.

Original language	Undefined/Unknown
Pages (from-to)	1540-1552
Journal	Monthly Notices of the Royal Astronomical Society
Volume	451
Publication status	Published - 5 May 2015

Bibliographical note

Accepted for publication in MNRAS. 13 pages, 11 figures. Comments welcome

Keywords

astro-ph.GA

Handle.net

Persistent link

Research in planetary formation, astrophysics, and cosmology at Bristol
Birkinshaw, M. (Principal Investigator)
1/04/15 → 31/03/18
Project: Research

Cite this

@article{c1d29d7337544b40bb4c4dcef9a939ba,

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 (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.",

keywords = "astro-ph.GA",

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

note = "Accepted for publication in MNRAS. 13 pages, 11 figures. Comments welcome",

year = "2015",

month = may,

day = "5",

language = "Undefined/Unknown",

volume = "451",

pages = "1540--1552",

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

issn = "0035-8711",

publisher = "Oxford University Press",

}

TY - JOUR

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 - Bland-Hawthorn, J.

AU - Brough, S.

AU - Brown, M. J. I.

AU - Driver, S. P.

AU - Kelvin, L. S.

AU - Phillipps, S.

N1 - Accepted for publication in MNRAS. 13 pages, 11 figures. Comments welcome

PY - 2015/5/5

Y1 - 2015/5/5

N2 - 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.

AB - 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.

KW - astro-ph.GA

M3 - Article (Academic Journal)

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

ER -

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

Abstract

Bibliographical note

Keywords

Handle.net

Projects

Research in planetary formation, astrophysics, and cosmology at Bristol

Cite this