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H-ATLAS/GAMA: quantifying the morphological evolution of the galaxy population using cosmic calorimetry

Eales, Stephen; Fullard, Andrew; Allen, Matthew; Smith, M.W.L.; Baldry, Ivan; Bourne, Nathan; Clark, C.J.R.; Driver, Simon; Dunne, Loretta; Dye, S.; Graham, Alister W.; Ibar, Edo; Hopkins, Andrew; Ivison, Rob; Kelvin, Lee S.; Maddox, Steve; Maraston, Claudia; Robotham, Aaron S.G.; Smith, Dan; Taylor, Edward N.; Valiante, Elisabetta; Werf, Paul van der; Baes, Maarten; Brough, Sarah; Clements, David; Cooray, Asantha; Gomez, Haley; Loveday, Jon; Phillipps, Steven; Scott, Douglas; Serjeant, Steve

Authors

Stephen Eales

Andrew Fullard

Matthew Allen

M.W.L. Smith

Ivan Baldry

Nathan Bourne

C.J.R. Clark

Simon Driver

Loretta Dunne

SIMON DYE Simon.Dye@nottingham.ac.uk
Associate Professor

Alister W. Graham

Edo Ibar

Andrew Hopkins

Rob Ivison

Lee S. Kelvin

Steve Maddox

Claudia Maraston

Aaron S.G. Robotham

Dan Smith

Edward N. Taylor

Elisabetta Valiante

Paul van der Werf

Maarten Baes

Sarah Brough

David Clements

Asantha Cooray

Haley Gomez

Jon Loveday

Steven Phillipps

Douglas Scott

Steve Serjeant



Abstract

Using results from the Herschel Astrophysical Terrahertz Large-Area Survey (H-ATLAS) and the Galaxy and Mass Assembly (GAMA) project, we show that, for galaxy masses above ≃ 108 M⊙, 51 per cent of the stellar mass-density in the local Universe is in early-type galaxies (ETGs; Sérsic n > 2.5) while 89 per cent of the rate of production of stellar mass-density is occurring in late-type galaxies (LTGs; Sérsic n < 2.5). From this zero-redshift benchmark, we have used a calorimetric technique to quantify the importance of the morphological transformation of galaxies over the history of the Universe. The extragalactic background radiation contains all the energy generated by nuclear fusion in stars since the big bang. By resolving this background radiation into individual galaxies using the deepest far-infrared survey with the Herschel Space Observatory and a deep near-infrared/optical survey with the Hubble Space Telescope (HST), and using measurements of the Sérsic index of these galaxies derived from the HST images, we estimate that ≃83 per cent of the stellar mass-density formed over the history of the Universe occurred in LTGs. The difference between this value and the fraction of the stellar mass-density that is in LTGs today implies there must have been a major transformation of LTGs into ETGs after the formation of most of the stars.

Journal Article Type Article
Publication Date 2015
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 0035-8711
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 452
Issue 4
Pages 3489--3507
APA6 Citation Eales, S., Fullard, A., Allen, M., Smith, M., Baldry, I., Bourne, N., …Serjeant, S. (2015). H-ATLAS/GAMA: quantifying the morphological evolution of the galaxy population using cosmic calorimetry. Monthly Notices of the Royal Astronomical Society, 452(4), 3489--3507. https://doi.org/10.1093/mnras/stv1300
DOI https://doi.org/10.1093/mnras/stv1300
Keywords galaxies: bulges, galaxies: evolution, galaxies: star formation
Publisher URL http://eprints.nottingham.ac.uk/42390/
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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