An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: Source catalogue and properties. (arXiv:1903.02602v1 [astro-ph.GA])

An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: Source catalogue and properties. (arXiv:1903.02602v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Stach_S/0/1/0/all/0/1">S. M. Stach</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Dudzeviciute_U/0/1/0/all/0/1">U. Dudzevičiūtė</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Smail_I/0/1/0/all/0/1">I. Smail</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Swinbank_A/0/1/0/all/0/1">A. M. Swinbank</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Geach_J/0/1/0/all/0/1">J. E. Geach</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Simpson_J/0/1/0/all/0/1">J. M. Simpson</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+An_F/0/1/0/all/0/1">F. X. An</a> (4 and 1), <a href="http://arxiv.org/find/astro-ph/1/au:+Almaini_O/0/1/0/all/0/1">O. Almaini</a> (5), <a href="http://arxiv.org/find/astro-ph/1/au:+Arumugam_V/0/1/0/all/0/1">V. Arumugam</a> (6 and 7), <a href="http://arxiv.org/find/astro-ph/1/au:+Blain_A/0/1/0/all/0/1">A. W. Blain</a> (8), <a href="http://arxiv.org/find/astro-ph/1/au:+Chapman_S/0/1/0/all/0/1">S. C. Chapman</a> (9), <a href="http://arxiv.org/find/astro-ph/1/au:+Chen_C/0/1/0/all/0/1">C. -C. Chen</a> (6), <a href="http://arxiv.org/find/astro-ph/1/au:+Conselice_C/0/1/0/all/0/1">C. J. Conselice</a> (5), <a href="http://arxiv.org/find/astro-ph/1/au:+Cooke_E/0/1/0/all/0/1">E. A. Cooke</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Coppin_K/0/1/0/all/0/1">K. E. K. Coppin</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Cunha_E/0/1/0/all/0/1">E. da Cunha</a> (10), <a href="http://arxiv.org/find/astro-ph/1/au:+Dunlop_J/0/1/0/all/0/1">J. S. Dunlop</a> (7), <a href="http://arxiv.org/find/astro-ph/1/au:+Farrah_D/0/1/0/all/0/1">D. Farrah</a> (11,12), <a href="http://arxiv.org/find/astro-ph/1/au:+Gullberg_B/0/1/0/all/0/1">B. Gullberg</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Hodge_J/0/1/0/all/0/1">J. A. Hodge</a> (13), <a href="http://arxiv.org/find/astro-ph/1/au:+Ivison_R/0/1/0/all/0/1">R. J. Ivison</a> (6 and 7), <a href="http://arxiv.org/find/astro-ph/1/au:+Kocevski_D/0/1/0/all/0/1">Dale D. Kocevski</a> (14), <a href="http://arxiv.org/find/astro-ph/1/au:+Michalowski_M/0/1/0/all/0/1">M. J. Michałowski</a> (15), <a href="http://arxiv.org/find/astro-ph/1/au:+Miyaji_T/0/1/0/all/0/1">Takamitsu Miyaji</a> (16), <a href="http://arxiv.org/find/astro-ph/1/au:+Scott_D/0/1/0/all/0/1">D. Scott</a> (17), <a href="http://arxiv.org/find/astro-ph/1/au:+Thomson_A/0/1/0/all/0/1">A. P. Thomson</a> (18), <a href="http://arxiv.org/find/astro-ph/1/au:+Wardlow_J/0/1/0/all/0/1">J. L. Wardlow</a> (19), <a href="http://arxiv.org/find/astro-ph/1/au:+Weiss_A/0/1/0/all/0/1">Axel Weiss</a> (20), <a href="http://arxiv.org/find/astro-ph/1/au:+Werf_P/0/1/0/all/0/1">P. van der Werf</a> (13) ((1) Durham University, (2) University of Hertfordshire, (3) ASIAA, (4) Purple Mountain Observatory, (5) University of Nottingham, (6) ESO, (7) University of Edinburgh, (8) University of Leicester, (9) Dalhousie University, (10) Australian National University, (11,12) University of Hawaii, (13) Leiden University, (14) Colby College, (15) Adam Mickiewicz University, (16) UNAM, (17) University of British Columbia, (18) University of Manchester, (19) Lancaster University, (20) Max-Planck Institut)

We present the catalogue and properties of sources in AS2UDS, an 870-$mu$m
continuum survey with the Atacama Large Millimetre/sub-millimetre Array (ALMA)
of 716 single-dish sub-millimetre sources detected in the UKIDSS/UDS field by
the SCUBA-2 Cosmology Legacy Survey. In our sensitive ALMA follow-up
observations we detect 708 sub-millimetre galaxies (SMGs) at $>$,4.3$sigma$
significance across the $sim$,1-degree diameter field. We combine our precise
ALMA positions with the extensive multi-wavelength coverage in the UDS field to
fit the spectral energy distributions of our SMGs to derive a median redshift
of $z_{rm phot}=$,2.61$pm$0.09. This large sample reveals a statistically
significant trend of increasing sub-millimetre flux with redshift 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 these blank maps correspond to real single-dish
sub-millimetre sources. We further show that these blank maps contain an excess
of galaxies at $z_{rm phot}=$,1.5–4 compared to random fields, similar to
the redshift range of the ALMA-detected SMGs. In addition, we combine X-ray and
mid-infrared active galaxy nuclei activity (AGN) indicators to yield a likely
range for the AGN fraction of 8–28,% in our sample. Finally, we compare the
redshifts of this population of high-redshift, strongly star-forming galaxies
with the inferred formation redshifts of massive, passive galaxies being found
out to $zsim$,2, finding reasonable agreement — in support of an
evolutionary connection between these two classes of massive galaxy.

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