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The LABOCA survey o...
The LABOCA survey of the Extended Chandra Deep Field-South: a photometric redshift survey of submillimetre galaxies
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- Wardlow, J. L. (author)
- University of California at Irvine (UCI),Durham University
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- Smail, I. (author)
- Durham University
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- Coppin, K. E. K. (author)
- Durham University
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- Alexander, D. M. (author)
- University of California at Irvine (UCI)
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- Brandt, W. N. (author)
- Pennsylvania State University
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- Danielson, A. L. R. (author)
- University of California at Irvine (UCI)
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- Luo, B. (author)
- Pennsylvania State University
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- Swinbank, A. M. (author)
- Durham University
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- Walter, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Weiss, A. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Xue, Y. Q. (author)
- Pennsylvania State University
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- Zibetti, S. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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Bertoldi, F. (author)
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- Biggs, A. D. (author)
- European Southern Observatory (ESO)
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- Chapman, S. C. (author)
- University Of Cambridge
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- Dannerbauer, H. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Dunlop, J.S. (author)
- University of Edinburgh
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- Gawiser, E. (author)
- Rutgers University
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- Ivison, R. J. (author)
- University of Edinburgh,Royal Observatory
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- Knudsen, Kirsten Kraiberg, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kovacs, A. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Lacey, C. G. (author)
- Durham University
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- Menten, K. M. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Padilla, N. (author)
- Pontificia Universidad Catolica de Chile
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- Rix, H. W. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- van der Werf, P.P. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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(creator_code:org_t)
- 2011-06-16
- 2011
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 415:2, s. 1479-1508
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Abstract
Subject headings
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- We derive photometric redshifts from 17-band optical to mid-infrared photometry of 78 robust radio, 24-mu m and Spitzer IRAC counterparts to 72 of the 126 submillimetre galaxies (SMGs) selected at 870 mu m by LABOCA observations in the Extended Chandra Deep Field-South (ECDF-S). We test the photometric redshifts of the SMGs against the extensive archival spectroscopy in the ECDF-S. The median photometric redshift of identified SMGs is z = 2.2 +/- 0.1, the standard deviation is sigma(z) = 0.9 and we identify 11 (similar to 15 per cent) high-redshift (z >= 3) SMGs. A statistical analysis of sources in the error circles of unidentified SMGs identifies a population of possible counterparts with a redshift distribution peaking at z = 2.5 +/- 0.2, which likely comprises similar to 60 per cent of the unidentified SMGs. This confirms that the bulk of the undetected SMGs are coeval with those detected in the radio/mid-infrared. We conclude that at most similar to 15 per cent of all the SMGs are below the flux limits of our IRAC observations and thus may lie at z greater than or similar to 3 and hence at most similar to 30 per cent of all SMGs have z greater than or similar to 3. We estimate that the full S(870 mu m) > 4mJy SMG population has a median redshift of 2.5 +/- 0.5. In contrast to previous suggestions, we find no significant correlation between submillimetre flux and redshift. The median stellar mass of the SMGs derived from spectral energy distribution fitting is (9.1 +/- 0.5) x 10(10)M(circle dot) although we caution that the uncertainty in the star formation histories results in a factor of similar to 5 uncertainty in these stellarmasses. Using a single temperature modified blackbody fit with beta = 1.5, the median characteristic dust temperature of SMGs is 37.4 +/- 1.4K. The infrared luminosity function shows that SMGs at z = 2-3 typically have higher far-infrared luminosities and luminosity density than those at z = 1-2. This is mirrored in the evolution of the star formation rate density (SFRD) for SMGs which peaks at z similar to 2. The maximum contribution of bright SMGs to the global SFRD (similar to 5 per cent for SMGs with S(870 mu m) greater than or similar to 4mJy or similar to 50 per cent extrapolated to SMGs with S(870 mu m) > 1mJy) also occurs at z similar to 2.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- spitzer-space-telescope
- galaxies: starburst
- mu-m observations
- degree extragalactic survey
- function
- sources
- v614
- star-forming galaxies
- yale-chile musyc
- submillimetre: galaxies
- carthy pj
- similar-to 2.5
- luminous infrared galaxies
- galaxies: evolution
- scuba super-map
- 2004
- galaxies: high-redshift
- p9
- x-ray
- initial mass
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
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Wardlow, J. L.
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Smail, I.
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Coppin, K. E. K.
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Alexander, D. M.
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Brandt, W. N.
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Danielson, A. L. ...
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show more...
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Luo, B.
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Swinbank, A. M.
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Walter, F.
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Weiss, A.
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Xue, Y. Q.
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Zibetti, S.
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Bertoldi, F.
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Biggs, A. D.
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Chapman, S. C.
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Dannerbauer, H.
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Dunlop, J.S.
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Gawiser, E.
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Ivison, R. J.
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Knudsen, Kirsten ...
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Kovacs, A.
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Lacey, C. G.
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Menten, K. M.
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Padilla, N.
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Rix, H. W.
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van der Werf, P. ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Monthly Notices ...
- By the university
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Chalmers University of Technology