An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field:Halo masses for submillimetre galaxies

Stach, S.M. and Smail, I. and Amvrosiadis, A. and Swinbank, A.M. and Dudzevičiūtė, U. and Geach, J.E. and Almaini, O. and Birkin, J.E. and Chen, C.-C. and Conselice, C.J. and Cooke, E.A. and Coppin, K.E.K. and Dunlop, J.S. and Farrah, D. and Ikarashi, S. and Ivison, R.J. and Wardlow, J.L. (2021) An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field:Halo masses for submillimetre galaxies. Monthly Notices of the Royal Astronomical Society, 504 (1). pp. 172-184. ISSN 0035-8711

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Abstract

We present an analysis of the spatial clustering of a large sample of high-resolution, interferometically identified, submillimetre galaxies (SMGs). We measure the projected cross-correlation function of ∼350 SMGs in the UKIDSS Ultra Deep-Survey Field across a redshift range of z = 1.5-3 utilizing a method that incorporates the uncertainties in the redshift measurements for both the SMGs and cross-correlated galaxies through sampling their full probability distribution functions. By measuring the absolute linear bias of the SMGs, we derive halo masses of log 10 (M_ halo[h-1, M⊙]) ∼12.8 with no evidence of evolution in the halo masses with redshift, contrary to some previous work. From considering models of halo mass growth rates, we predict that the SMGs will reside in haloes of mass log 10(M halo[{h-1,\rm M⊙]) ∼13.2 at z = 0, consistent with the expectation that the majority of z = 1.5-3 SMGs will evolve into present-day spheroidal galaxies. Finally, comparing to models of stellar-to-halo mass ratios, we show that SMGs may correspond to systems that are maximally efficient at converting their gas reservoirs into stars. We compare them to a simple model for gas cooling in haloes that suggests that the unique properties of the SMG population, including their high levels of star formation and their redshift distribution, are a result of the SMGs being the most massive galaxies that are still able to accrete cool gas from their surrounding intragalactic medium.

Item Type:
Journal Article
Journal or Publication Title:
Monthly Notices of the Royal Astronomical Society
Additional Information:
This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version S M Stach, I Smail, A Amvrosiadis, A M Swinbank, U Dudzevičiūtė, J E Geach, O Almaini, J E Birkin, Chian-Chou Chen, C J Conselice, E A Cooke, K E K Coppin, J S Dunlop, D Farrah, S Ikarashi, R J Ivison, J L Wardlow, An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: halo masses for submillimetre galaxies, Monthly Notices of the Royal Astronomical Society, Volume 504, Issue 1, June 2021, Pages 172–184, https://doi.org/10.1093/mnras/stab714 is available online at: https://academic.oup.com/mnras/article-abstract/504/1/172/6166775
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1912
Subjects:
ID Code:
156944
Deposited By:
Deposited On:
06 Jul 2021 16:20
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Oct 2021 04:57