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The SCUBA-2 Cosmology Legacy Survey: demographics of the 450-μm population

Roseboom, I.G.; Dunlop, J.S.; Cirasuolo, M.; Geach, J.E.; Smail, I.; Halpern, M.; van der Werf, P.; Almaini, O.; Arumugam, V.; Asboth, V.; Auld, R.; Blain, A.; Bremer, M.N.; Bock, J.; Bowler, R.A.A.; Buitrago, F.; Chapin, E.; Chapman, S.; Chrysostomou, A.; Clarke, C.; Conley, A.; Coppin, K.E.K.; Danielson, A.L.R.; Farrah, D.; Glenn, J.; Hatziminaoglou, E.; Ibar, E.; Ivison, R.J.; Jenness, T.; van Kampen, E.; Karim, A.; Mackenzie, T.; Marsden, G.; Meijerink, R.; Michałowski, M.J.; Oliver, S.J.; Page, M.J.; Pearson, E.; Scott, D.; Simpson, J.M.; Smith, D.J.B.; Spaans, M.; Swinbank, A.M.; Symeonidis, M.; Targett, T.; Valiante, E.; Viero, M.; Wang, L.; Willott, C.J.; Zemcov, M.

The SCUBA-2 Cosmology Legacy Survey: demographics of the 450-μm population Thumbnail


I.G. Roseboom

J.S. Dunlop

M. Cirasuolo

J.E. Geach

M. Halpern

P. van der Werf

O. Almaini

V. Arumugam

V. Asboth

R. Auld

A. Blain

M.N. Bremer

J. Bock

R.A.A. Bowler

F. Buitrago

E. Chapin

S. Chapman

A. Chrysostomou

C. Clarke

A. Conley

K.E.K. Coppin

A.L.R. Danielson

D. Farrah

J. Glenn

E. Hatziminaoglou

E. Ibar

R.J. Ivison

T. Jenness

E. van Kampen

A. Karim

T. Mackenzie

G. Marsden

R. Meijerink

M.J. Michałowski

S.J. Oliver

M.J. Page

E. Pearson

D. Scott

J.M. Simpson

D.J.B. Smith

M. Spaans

M. Symeonidis

T. Targett

E. Valiante

M. Viero

L. Wang

C.J. Willott

M. Zemcov


We investigate the multiwavelength properties of a sample of 450-μm-selected sources from the SCUBA-2 Cosmology Legacy Survey. A total of 69 sources were identified above 4σ in deep SCUBA-2 450-μm observations overlapping the UDS and COSMOS fields and covering 210 arcmin2 to a typical depth of σ450 = 1.5 mJy. Reliable cross-identifications are found for 58 sources (84 per cent) in Spitzer and Hubble Space Telescope WFC3/IR data. The photometric redshift distribution (dN/dz) of 450-μm-selected sources is presented, showing a broad peak in the redshift range 1 < z < 3 and a median of z = 1.4. Combining the SCUBA-2 photometry with Herschel SPIRE data from HerMES, the submm spectral energy distribution (SED) is examined via the use of modified blackbody fits, yielding aggregate values for the IR luminosity, dust temperature and emissivity of 〈LIR〉 = 1012 ± 0.8 L⊙, 〈TD〉 = 42 ± 11 K and 〈βD〉 = 1.6 ± 0.5, respectively. The relationship between these SED parameters and the physical properties of galaxies is investigated, revealing correlations between TD and LIR and between βD and both stellar mass and effective radius. The connection between the star formation rate (SFR) and stellar mass is explored, with 24 per cent of 450-μm sources found to be ‘starbursts’, i.e. displaying anomalously high specific SFRs. However, both the number density and observed properties of these ‘starburst’ galaxies are found to be consistent with the population of normal star-forming galaxies.

Journal Article Type Article
Publication Date Nov 1, 2013
Deposit Date Apr 15, 2014
Publicly Available Date Jul 3, 2014
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 436
Issue 1
Pages 430-448
Keywords Galaxies: evolution, Galaxies: starburst, Submillimetre: galaxies.
Public URL


Published Journal Article (1.4 Mb)

Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society © 2013 The Authors Published by Oxford University Press on behalf of Royal Astronomical Society. All rights reserved.

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