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

Stach, S. M.; Smail, I.; Amvrosiadis, A.; Swinbank, A. M.; Dudzevi?i?t?, U.; Geach, J. E.; Almaini, O.; Birkin, J. E.; Chen, Chian Chou; Conselice, C. J.; Cooke, E. A.; Coppin, K E K; Dunlop, J. S.; Farrah, D.; Ikarashi, S.; Ivison, R. J.; Wardlow, J. L.

doi:10.1093/mnras/stab714

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

Stach, S. M.; Smail, I.; Amvrosiadis, A.; Swinbank, A. M.; Dudzevi?i?t?, U.; Geach, J. E.; Almaini, O.; Birkin, J. E.; Chen, Chian Chou; Conselice, C. J.; Cooke, E. A.; Coppin, K E K; Dunlop, J. S.; Farrah, D.; Ikarashi, S.; Ivison, R. J.; Wardlow, J. L.

Authors

S. M. Stach

I. Smail

A. Amvrosiadis

A. M. Swinbank

U. Dudzevi?i?t?

J. E. Geach

Professor OMAR ALMAINI omar.almaini@nottingham.ac.uk
PROFESSOR OF ASTROPHYSICS

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

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.

Citation

Stach, S. M., Smail, I., Amvrosiadis, A., Swinbank, A. M., Dudzevičiūtė, U., Geach, J. E., Almaini, O., Birkin, J. E., Chen, C. C., Conselice, C. J., Cooke, E. A., Coppin, K. E. K., Dunlop, J. S., Farrah, D., Ikarashi, S., Ivison, R. J., & 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), 172-184. https://doi.org/10.1093/mnras/stab714

Journal Article Type	Article
Acceptance Date	Mar 5, 2021
Online Publication Date	Mar 10, 2021
Publication Date	Jun 1, 2021
Deposit Date	Jun 8, 2021
Publicly Available Date	Jun 8, 2021
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Oxford University Press
Peer Reviewed	Peer Reviewed
Volume	504
Issue	1
Pages	172-184
DOI	https://doi.org/10.1093/mnras/stab714
Keywords	Space and Planetary Science; Astronomy and Astrophysics
Public URL	https://nottingham-repository.worktribe.com/output/5394817
Publisher URL	https://academic.oup.com/mnras/article-abstract/504/1/172/6166775
Additional Information	This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.