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Galaxy and mass assembly (GAMA): UgrizYJHK sérsic luminosity functions and the cosmic spectral energy distribution by hubble type

Kelvin, Lee S.; Driver, Simon P.; Robotham, Aaron S. G.; Graham, Alister W.; Phillipps, Steven; Agius, Nicola K.; Alpaslan, Mehmet; Baldry, Ivan; Bamford, Steven P.; Bland-Hawthorn, Joss; Brough, Sarah; Brown, Michael J. I.; Colless, Matthew; Conselice, Christopher J.; Hopkins, Andrew M.; Liske, Jochen; Loveday, Jon; Norberg, Peder; Pimbblet, Kevin A.; Popescu, Cristina C.; Prescott, Matthew; Taylor, Edward N.; Tuffs, Richard J.

Authors

Lee S. Kelvin

Simon P. Driver

Aaron S. G. Robotham

Alister W. Graham

Steven Phillipps

Nicola K. Agius

Mehmet Alpaslan

Ivan Baldry

Steven P. Bamford

Joss Bland-Hawthorn

Sarah Brough

Michael J. I. Brown

Matthew Colless

Christopher J. Conselice

Andrew M. Hopkins

Jochen Liske

Jon Loveday

Peder Norberg

Cristina C. Popescu

Matthew Prescott

Edward N. Taylor

Richard J. Tuffs



Abstract

We report the morphological classification of 3727 galaxies from the Galaxy and Mass Assembly survey with M r < -17.4 mag and in the redshift range 0.025 < z < 0.06 (2.1 × 10 5 Mpc 3 ) into E, S0-Sa, SB0-SBa, Sab-Scd, SBab-SBcd, Sd-Irr and little blue spheroid classes. Approximately 70 per cent of galaxies in our sample are disc-dominated systems, with the remaining ã30 per cent spheroid dominated. We establish the robustness of our classifications, and use them to derive morphological-type luminosity functions and luminosity densities in the ugrizYJHK passbands, improving on prior studies that split by global colour or light profile shape alone. We find that the total galaxy luminosity function is best described by a double-Schechter function while the constituent morphological-type luminosity functions are well described by a single-Schechter function. These data are also used to derive the star formation rate densities for each Hubble class, and the attenuated and unattenuated (corrected for dust) cosmic spectral energy distributions, i.e. the instantaneous energy production budget. While the observed optical/near-IR energy budget is dominated 58:42 by galaxies with a significant spheroidal component, the actual energy production rate is reversed, i.e. the combined disc-dominated populations generate ̃1.3 times as much energy as the spheroid-dominated populations. On the grandest scale, this implies that chemical evolution in the local Universe is currently largely confined to mid-type spiral classes like our Milky Way.

Journal Article Type Article
Publication Date Apr 1, 2014
Journal Monthly notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press (OUP)
Peer Reviewed Peer Reviewed
Volume 439
Issue 2
Pages 1245-1269
APA6 Citation Kelvin, L. S., Driver, S. P., Robotham, A. S. G., Graham, A. W., Phillipps, S., Agius, N. K., …Tuffs, R. J. (2014). Galaxy and mass assembly (GAMA): UgrizYJHK sérsic luminosity functions and the cosmic spectral energy distribution by hubble type. Monthly notices, containing papers, abstracts of papers, and reports of the proceedings of the Society, 439(2), 1245-1269. https://doi.org/10.1093/mnras/stt2391
DOI https://doi.org/10.1093/mnras/stt2391
Keywords Galaxies -- elliptical and lenticular, cD; Galaxies -- fundamental parameters; Galaxies -- luminosity function, mass function; Galaxies -- spiral
Publisher URL https://academic.oup.com/mnras/article/439/2/1245/1003693
Copyright Statement © 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society

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Copyright Statement
© 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society





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