The SCUBA-2 Cosmology Legacy Survey: the clustering of submillimetre galaxies in the UKIDSS UDS field

Wilkinson, A.; Almaini, O.; Chen, C.-C.; Smail, I.; Arumugam, V.; Blain, A.; Chapin, E.L.; Chapman, S.C.; Conselice, C.J.; Cowley, W.I.; Dunlop, J.S.; Farrah, D.; Geach, J.; Hartley, W.G.; Ivison, R.J.; Maltby, D.T.; Michałowski, M.J.; Mortlock, A.; Scott, D.; Simpson, C.; Simpson, J.M.; van der Werf, P.; Wild, V.

doi:10.1093/mnras/stw2405

The SCUBA-2 Cosmology Legacy Survey: the clustering of submillimetre galaxies in the UKIDSS UDS field

Wilkinson, A.; Almaini, O.; Chen, C.-C.; Smail, I.; Arumugam, V.; Blain, A.; Chapin, E.L.; Chapman, S.C.; Conselice, C.J.; Cowley, W.I.; Dunlop, J.S.; Farrah, D.; Geach, J.; Hartley, W.G.; Ivison, R.J.; Maltby, D.T.; Michałowski, M.J.; Mortlock, A.; Scott, D.; Simpson, C.; Simpson, J.M.; van der Werf, P.; Wild, V.

Authors

A. Wilkinson

O. Almaini

C.-C. Chen

Professor Ian Smail ian.smail@durham.ac.uk
Emeritus Professor

V. Arumugam

A. Blain

E.L. Chapin

S.C. Chapman

C.J. Conselice

W.I. Cowley

J.S. Dunlop

D. Farrah

J. Geach

W.G. Hartley

R.J. Ivison

D.T. Maltby

M.J. Michałowski

A. Mortlock

D. Scott

C. Simpson

J.M. Simpson

P. van der Werf

V. Wild

Abstract

Submillimetre galaxies (SMGs) are among the most luminous dusty galaxies in the Universe, but their true nature remains unclear; are SMGs the progenitors of the massive elliptical galaxies we see in the local Universe, or are they just a short-lived phase among more typical star-forming galaxies? To explore this problem further, we investigate the clustering of SMGs identified in the SCUBA-2 Cosmology Legacy Survey. We use a catalogue of submillimetre (850 μm) source identifications derived using a combination of radio counterparts and colour/infrared selection to analyse a sample of 610 SMG counterparts in the United Kingdom Infrared Telescope (UKIRT) Infrared Deep Survey (UKIDSS) Ultra Deep Survey (UDS), making this the largest high-redshift sample of these galaxies to date. Using angular cross-correlation techniques, we estimate the halo masses for this large sample of SMGs and compare them with passive and star-forming galaxies selected in the same field. We find that SMGs, on average, occupy high-mass dark matter haloes (Mhalo > 1013 M⊙) at redshifts z > 2.5, consistent with being the progenitors of massive quiescent galaxies in present-day galaxy clusters. We also find evidence of downsizing, in which SMG activity shifts to lower mass haloes at lower redshifts. In terms of their clustering and halo masses, SMGs appear to be consistent with other star-forming galaxies at a given redshift.

Citation

Wilkinson, A., Almaini, O., Chen, C., Smail, I., Arumugam, V., Blain, A., …Wild, V. (2017). The SCUBA-2 Cosmology Legacy Survey: the clustering of submillimetre galaxies in the UKIDSS UDS field. Monthly Notices of the Royal Astronomical Society, 464(2), 1380-1392. https://doi.org/10.1093/mnras/stw2405

Journal Article Type	Article
Acceptance Date	Sep 21, 2016
Online Publication Date	Sep 22, 2016
Publication Date	Jan 11, 2017
Deposit Date	Feb 22, 2017
Publicly Available Date	Mar 2, 2017
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	464
Issue	2
Pages	1380-1392
DOI	https://doi.org/10.1093/mnras/stw2405
Related Public URLs	http://adsabs.harvard.edu/abs/2017MNRAS.464.1380W

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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.