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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Herschel -ATLAS/GAMA: A census of dust in optically selected galaxies from stacking at submillimetre wavelengths
Monthly Notices of the Royal Astronomical Society, Volume 421, No. 4, Year 2012
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Description
We use the Herschel-ATLAS survey to conduct the first large-scale statistical study of the submillimetre properties of optically selected galaxies. Using ∼80000 r-band selected galaxies from 126 deg 2 of the GAMA survey, we stack into submillimetre imaging at 250, 350 and 500μ m to gain unprecedented statistics on the dust emission from galaxies at z < 0.35. We find that low-redshift galaxies account for 5 per cent of the cosmic 250-μm background (4 per cent at 350μ m; 3 per cent at 500μ m), of which approximately 60 per cent comes from 'blue' and 20 per cent from 'red' galaxies (rest-frame g-r). We compare the dust properties of different galaxy populations by dividing the sample into bins of optical luminosity, stellar mass, colour and redshift. In blue galaxies we find that dust temperature and luminosity correlate strongly with stellar mass at a fixed redshift, but red galaxies do not follow these correlations and overall have lower luminosities and temperatures. We make reasonable assumptions to account for the contaminating flux from lensing by red-sequence galaxies and conclude that galaxies with different optical colours have fundamentally different dust emission properties. Results indicate that while blue galaxies are more luminous than red galaxies due to higher temperatures, the dust masses of the two samples are relatively similar. Dust mass is shown to correlate with stellar mass, although the dust-to-stellar mass ratio is much higher for low stellar mass galaxies, consistent with the lowest mass galaxies having the highest specific star formation rates. We stack the 250μ m-to-NUV luminosity ratio, finding results consistent with greater obscuration of star formation at lower stellar mass and higher redshift. Submillimetre luminosities and dust masses of all galaxies are shown to evolve strongly with redshift, indicating a fall in the amount of obscured star formation in ordinary galaxies over the last four billion years. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
Authors & Co-Authors
Bourne, Nathan
United Kingdom, Nottingham
University of Nottingham
Maddox, Steve J.
United Kingdom, Nottingham
University of Nottingham
Dunne, Loretta
United Kingdom, Nottingham
University of Nottingham
Auld, Robbie R.
United Kingdom, Cardiff
Cardiff University
Baes, Maarten
Belgium, Ghent
Universiteit Gent
Baldry, Ivan K.
United Kingdom, Liverpool
Liverpool John Moores University
Bonfield, David G.
United Kingdom, Hatfield
University of Hertfordshire
Cooray, Asantha Roshan
United States, Irvine
University of California, Irvine
Croom, Scott M.
Australia, Sydney
The University of Sydney
Dariush, Aliakbar A.
United Kingdom, London
Imperial College London
de Zotti, Gianfranco
Italy, Padua
Osservatorio Astronomico Di Padova
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Driver, Simon P.
United Kingdom, St Andrews
University of st Andrews
Australia, Perth
The University of Western Australia
Dye, S.
United Kingdom, Nottingham
University of Nottingham
Eales, Stephen A.
United Kingdom, Cardiff
Cardiff University
Gomez, Haley L.
United Kingdom, Cardiff
Cardiff University
Gonzalez-Nuevo, J.
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Hopkins, Andrew M.
Australia
Australian Astronomical Observatory
Ibar, E.
United Kingdom, Edinburgh
Royal Observatory
Jarvis, Matthew J.
United Kingdom, Hatfield
University of Hertfordshire
South Africa, Bellville
University of the Western Cape
Lapi, Andrea
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Madore, Barry F.
United States, Pasadena
Carnegie Institution for Science
Michałowski, Michał J.
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Pohlen, Michael
United Kingdom, Cardiff
Cardiff University
Popescu, Cristina C.
United Kingdom, Preston
University of Central Lancashire
Rigby, Emma E.
United Kingdom, Nottingham
University of Nottingham
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Seibert, Mark
United States, Pasadena
Carnegie Institution for Science
Smith, Daniel James B.
United Kingdom, Nottingham
University of Nottingham
United Kingdom, Hatfield
University of Hertfordshire
Tuffs, Richard J.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
van der Werf, Paul P.
Netherlands, Leiden
Sterrewacht Leiden
Brough, Sarah
Australia
Australian Astronomical Observatory
Buttiglione, Sara
Italy, Padua
Osservatorio Astronomico Di Padova
Cava, Antonio
Spain, Madrid
Universidad Complutense de Madrid
Clements, David L.
United Kingdom, London
Imperial College London
Conselice, Christopher J.
United Kingdom, Nottingham
University of Nottingham
Fritz, Jacopo
Belgium, Ghent
Universiteit Gent
Hopwood, Rosalind H.B.
United Kingdom, London
Imperial College London
Ivison, Robert J.
United Kingdom, Edinburgh
Royal Observatory
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Jones, Daniel Heath
Australia, Clayton
Monash University
Kelvin, Lee S.
United Kingdom, St Andrews
University of st Andrews
Liske, Jochen
Germany, Garching Bei Munchen
European Southern Observatory
Loveday, Jon N.
United Kingdom, Brighton
University of Sussex
Norberg, Peder R.
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Robotham, Aaron S.G.
United Kingdom, St Andrews
University of st Andrews
Rodighiero, Giulia
Italy, Padua
Università Degli Studi Di Padova
Temi, Pasquale
United States, Moffett Field
Nasa Ames Research Center
Statistics
Citations: 72
Authors: 45
Affiliations: 27
Identifiers
Doi:
10.1111/j.1365-2966.2012.20528.x
ISSN:
00358711
e-ISSN:
13652966
Research Areas
Environmental
Study Design
Cross Sectional Study
Study Approach
Quantitative