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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The infrared properties of sources matched in the wise all-sky and Herschel atlas surveys
Astrophysical Journal Letters, Volume 750, No. 1, Article L18, Year 2012
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Description
We describe the infrared properties of sources detected over 36deg 2 of sky in the GAMA 15 hr equatorial field, using data from both the Herschel Astrophysical Terahertz Large-Area Survey (H-ATLAS) and Wide-field Infrared Survey (WISE). With 5σ point-source depths of 34 and 0.048mJy at 250 μm and 3.4 μm, respectively, we are able to identify 50.6% of the H-ATLAS sources in the WISE survey, corresponding to a surface density of 630deg-2. Approximately two-thirds of these sources have measured spectroscopic or optical/near-IR photometric redshifts of z < 1. For sources with spectroscopic redshifts at z < 0.3, we find a linear correlation between the infrared luminosity at 3.4 μm and that at 250 μm, with ±50% scatter over 1.5 orders of magnitude in luminosity, 109-10 10.5 L. By contrast, the matched sources without previously measured redshifts (r ≳ 20.5) have 250-350 μm flux density ratios which suggest either high-redshift galaxies (z ≳ 1.5) or optically faint low-redshift galaxies with unusually low temperatures (T ≲ 20). Their small 3.4-250 μm flux ratios favor a high-redshift galaxy population, as only the most actively star-forming galaxies at low redshift (e.g., Arp 220) exhibit comparable flux density ratios. Furthermore, we find a relatively large active galactic nucleus fraction (30%) in a 12 μm flux-limited subsample of H-ATLAS sources, also consistent with there being a significant population of high-redshift sources in the no-redshift sample. © © 2012. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Bond, Nicholas A.
United States, Greenbelt
Nasa Goddard Space Flight Center
Benford, Dominic J.
United States, Greenbelt
Nasa Goddard Space Flight Center
Gardner, Jonathan P.
United States, Greenbelt
Nasa Goddard Space Flight Center
Amblard, Alexandre
United States, Moffett Field
Nasa Ames Research Center
Fleuren, Simone
United Kingdom, London
Queen Mary University of London
Blain, Andrew W.
United Kingdom, Leicester
University of Leicester
Dunne, Loretta
United Kingdom, Nottingham
University of Nottingham
Smith, Daniel James B.
United Kingdom, Hatfield
University of Hertfordshire
Maddox, Steve J.
United Kingdom, Nottingham
University of Nottingham
Hoyos, Carlos
United Kingdom, Nottingham
University of Nottingham
Baes, Maarten
Belgium, Ghent
Universiteit Gent
Bonfield, David G.
United Kingdom, Hatfield
University of Hertfordshire
Bourne, Nathan
United Kingdom, Nottingham
University of Nottingham
Bridge, Carrie R.
United States, Pasadena
California Institute of Technology
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
Cooray, Asantha Roshan
United States, Irvine
University of California, Irvine
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.
Australia, Perth
The University of Western Australia
United Kingdom, St Andrews
University of st Andrews
Dye, S.
United Kingdom, Nottingham
University of Nottingham
Eales, Stephen A.
United Kingdom, Cardiff
Cardiff University
Eisenhardt, Peter R.M.
United States, Pasadena
Jet Propulsion Laboratory
Hopwood, Rosalind H.B.
United Kingdom, London
Imperial College London
Ibar, E.
United Kingdom, Edinburgh
Royal Observatory
Ivison, Robert J.
United Kingdom, Edinburgh
Royal Observatory
Jarvis, Matthew J.
United Kingdom, Hatfield
University of Hertfordshire
South Africa, Bellville
University of the Western Cape
Kelvin, Lee S.
Australia, Perth
The University of Western Australia
United Kingdom, St Andrews
University of st Andrews
Robotham, Aaron S.G.
Australia, Perth
The University of Western Australia
United Kingdom, St Andrews
University of st Andrews
Temi, Pasquale
United States, Moffett Field
Nasa Ames Research Center
Thompson, Mark A.
United Kingdom, Hatfield
University of Hertfordshire
Tsai, Chaowei
United States, Pasadena
California Institute of Technology
van der Werf, Paul P.
Netherlands, Leiden
Sterrewacht Leiden
Wright, Edward L.
United States, Los Angeles
University of California, Los Angeles
Wu, Jingwen
United Kingdom, St Andrews
University of st Andrews
Yan, Lin
United States, Pasadena
Spitzer Science Center
Statistics
Citations: 37
Authors: 37
Affiliations: 22
Identifiers
Doi:
10.1088/2041-8205/750/1/L18
ISSN:
20418205
e-ISSN:
20418213
Study Design
Cross Sectional Study
Study Approach
Quantitative