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  • 1903.02602

    Rights statement: 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 Stuart M Stach, U Dudzevičiūtė, Ian Smail, A M Swinbank, J E Geach, J M Simpson, Fang Xia An, Omar Almaini, Vinodiran Arumugam, A W Blain, S C Chapman, Chian-Chou Chen, C J Conselice, E A Cooke, K E K Coppin, E da Cunha, J S Dunlop, Duncan Farrah, B Gullberg, J A Hodge, R J Ivison, Dale D Kocevski, M J Michałowski, Takamitsu Miyaji, Douglas Scott, A P Thomson, J L Wardlow, Axel Weiss, P van der Werf, An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: source catalogue and properties, Monthly Notices of the Royal Astronomical Society, Volume 487, Issue 4, August 2019, Pages 4648–4668, https://doi.org/10.1093/mnras/stz1536 is available online at: https://academic.oup.com/mnras/article/487/4/4648/5511908

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An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: Source catalogue and properties

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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  • S. M. Stach
  • U. Dudzevičiūtė
  • I. Smail
  • A. M. Swinbank
  • J. E. Geach
  • J. M. Simpson
  • F. X. An
  • O. Almaini
  • V. Arumugam
  • A. W. Blain
  • S. C. Chapman
  • C.-C. Chen
  • C. J. Conselice
  • E. A. Cooke
  • K. E. K. Coppin
  • E. da Cunha
  • J. S. Dunlop
  • D. Farrah
  • B. Gullberg
  • J. A. Hodge
  • R. J. Ivison
  • Dale D. Kocevski
  • M. J. Michałowski
  • Takamitsu Miyaji
  • D. Scott
  • A. P. Thomson
  • Axel Weiss
  • P. van der Werf
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<mark>Journal publication date</mark>1/08/2019
<mark>Journal</mark>Monthly Notices of the Royal Astronomical Society
Issue number4
Volume487
Number of pages21
Pages (from-to)4648-4668
Publication StatusPublished
Early online date6/06/19
<mark>Original language</mark>English

Abstract

We present the catalogue and properties of sources in AS2UDS, an870-$\mu$m continuum survey with the Atacama LargeMillimetre/sub-millimetre Array (ALMA) of 716 single-dish sub-millimetresources detected in the UKIDSS/UDS field by the SCUBA-2 Cosmology LegacySurvey. In our sensitive ALMA follow-up observations we detect 708sub-millimetre galaxies (SMGs) at $>$\,4.3$\sigma$ significanceacross the $\sim$\,1-degree diameter field. We combine our precise ALMApositions with the extensive multi-wavelength coverage in the UDS fieldto fit the spectral energy distributions of our SMGs to derive a medianredshift of $z_{\rm phot}=$\,2.61$\pm$0.09. This large sample reveals astatistically significant trend of increasing sub-millimetre flux withredshift suggestive of galaxy downsizing. 101 ALMA maps do not show a$>$\,4.3$\sigma$ SMG, but we demonstrate from stacking {\it Herschel}SPIRE observations at these positions, that the vast majority of theseblank maps correspond to real single-dish sub-millimetre sources. Wefurther show that these blank maps contain an excess of galaxies at$z_{\rm phot}=$\,1.5--4 compared to random fields, similar to theredshift range of the ALMA-detected SMGs. In addition, we combine X-rayand mid-infrared active galaxy nuclei activity (AGN) indicators to yielda likely range for the AGN fraction of 8--28\,\% in our sample. Finally,we compare the redshifts of this population of high-redshift, stronglystar-forming galaxies with the inferred formation redshifts of massive,passive galaxies being found out to $z\sim$\,2, finding reasonableagreement -- in support of an evolutionary connection between these twoclasses of massive galaxy.

Bibliographic note

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 Stuart M Stach, U Dudzevičiūtė, Ian Smail, A M Swinbank, J E Geach, J M Simpson, Fang Xia An, Omar Almaini, Vinodiran Arumugam, A W Blain, S C Chapman, Chian-Chou Chen, C J Conselice, E A Cooke, K E K Coppin, E da Cunha, J S Dunlop, Duncan Farrah, B Gullberg, J A Hodge, R J Ivison, Dale D Kocevski, M J Michałowski, Takamitsu Miyaji, Douglas Scott, A P Thomson, J L Wardlow, Axel Weiss, P van der Werf, An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: source catalogue and properties, Monthly Notices of the Royal Astronomical Society, Volume 487, Issue 4, August 2019, Pages 4648–4668, https://doi.org/10.1093/mnras/stz1536 is available online at: https://academic.oup.com/mnras/article/487/4/4648/5511908