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

Stuart M. Stach; U. Dudzevičiute; 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

doi:10.1093/mnras/stz1536

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

Stuart M. Stach, U. Dudzevičiute, 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. HodgeR. J. Ivison, Dale D. Kocevski, M. J. Michałowski, Takamitsu Miyaji, Douglas Scott, A. P. Thomson, J. L. Wardlow, Axel Weiss, P. Van Der Werf

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Abstract

We present the catalogue and basic properties of sources in AS2UDS, an 870-\mum 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 >4.3σ significance across the ∼1°-diameter field. We combine our precise ALMA positions with the extensive multiwavelength coverage in the UDS field which yields spectral energy distributions for our SMGs and a median redshift of z_phot = 2.61 ± 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 > 4.3σ SMG, but we demonstrate from stacking 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_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 per cent 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 z ∼ 2, finding reasonable agreement - in support of an evolutionary connection between these two classes of massive galaxy.

Original language	English
Pages (from-to)	4648-4668
Number of pages	21
Journal	Monthly Notices of the Royal Astronomical Society
Volume	487
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stz1536
Publication status	Published - 25 Jun 2019

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Stach, S. M., Dudzevičiute, U., Smail, I., Swinbank, A. M., Geach, J. E., Simpson, J. M., An, F. X., Almaini, O., Arumugam, V., Blain, A. W., Chapman, S. C., Chen, C. C., Conselice, C. J., Cooke, E. A., Coppin, K. E. K., Da Cunha, E., Dunlop, J. S., Farrah, D., Gullberg, B., ... Van Der Werf, P. (2019). An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: Source catalogue and properties. Monthly Notices of the Royal Astronomical Society, 487(4), 4648-4668. https://doi.org/10.1093/mnras/stz1536

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

abstract = "We present the catalogue and basic properties of sources in AS2UDS, an 870-\mum 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 >4.3σ significance across the ∼1°-diameter field. We combine our precise ALMA positions with the extensive multiwavelength coverage in the UDS field which yields spectral energy distributions for our SMGs and a median redshift of zphot = 2.61 ± 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 > 4.3σ SMG, but we demonstrate from stacking 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 zphot = 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 per cent 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 z ∼ 2, finding reasonable agreement - in support of an evolutionary connection between these two classes of massive galaxy.",

keywords = "galaxies: High-redshift, galaxies: Starburst, submillimetre: Galaxies",

author = "Stach, {Stuart M.} and U. Dudzevi{\v c}iute and Ian Smail and Swinbank, {A. M.} and Geach, {J. E.} and Simpson, {J. M.} and An, {Fang Xia} and Omar Almaini and Vinodiran Arumugam and Blain, {A. W.} and Chapman, {S. C.} and Chen, {Chian Chou} and Conselice, {C. J.} and Cooke, {E. A.} and Coppin, {K. E.K.} and {Da Cunha}, E. and Dunlop, {J. S.} and Duncan Farrah and B. Gullberg and Hodge, {J. A.} and Ivison, {R. J.} and Kocevski, {Dale D.} and Micha{\l}owski, {M. J.} and Takamitsu Miyaji and Douglas Scott and Thomson, {A. P.} and Wardlow, {J. L.} and Axel Weiss and {Van Der Werf}, P.",

note = "Publisher Copyright: {\textcopyright} 2019 The Author(s).",

year = "2019",

month = jun,

day = "25",

doi = "10.1093/mnras/stz1536",

language = "English",

volume = "487",

pages = "4648--4668",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press ",

number = "4",

}

Stach, SM, Dudzevičiute, U, Smail, I, Swinbank, AM, Geach, JE, Simpson, JM, An, FX, Almaini, O, Arumugam, V, Blain, AW, Chapman, SC, Chen, CC, Conselice, CJ, Cooke, EA, Coppin, KEK, Da Cunha, E, Dunlop, JS, Farrah, D, Gullberg, B, Hodge, JA, Ivison, RJ, Kocevski, DD, Michałowski, MJ, Miyaji, T, Scott, D, Thomson, AP, Wardlow, JL, Weiss, A & Van Der Werf, P 2019, 'An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field: Source catalogue and properties', Monthly Notices of the Royal Astronomical Society, vol. 487, no. 4, pp. 4648-4668. https://doi.org/10.1093/mnras/stz1536

TY - JOUR

T1 - An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field

T2 - Source catalogue and properties

AU - Stach, Stuart M.

AU - Dudzevičiute, U.

AU - Smail, Ian

AU - Swinbank, A. M.

AU - Geach, J. E.

AU - Simpson, J. M.

AU - An, Fang Xia

AU - Almaini, Omar

AU - Arumugam, Vinodiran

AU - Blain, A. W.

AU - Chapman, S. C.

AU - Chen, Chian Chou

AU - Conselice, C. J.

AU - Cooke, E. A.

AU - Coppin, K. E.K.

AU - Da Cunha, E.

AU - Dunlop, J. S.

AU - Farrah, Duncan

AU - Gullberg, B.

AU - Hodge, J. A.

AU - Ivison, R. J.

AU - Kocevski, Dale D.

AU - Michałowski, M. J.

AU - Miyaji, Takamitsu

AU - Scott, Douglas

AU - Thomson, A. P.

AU - Wardlow, J. L.

AU - Weiss, Axel

AU - Van Der Werf, P.

PY - 2019/6/25

Y1 - 2019/6/25

N2 - We present the catalogue and basic properties of sources in AS2UDS, an 870-\mum 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 >4.3σ significance across the ∼1°-diameter field. We combine our precise ALMA positions with the extensive multiwavelength coverage in the UDS field which yields spectral energy distributions for our SMGs and a median redshift of zphot = 2.61 ± 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 > 4.3σ SMG, but we demonstrate from stacking 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 zphot = 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 per cent 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 z ∼ 2, finding reasonable agreement - in support of an evolutionary connection between these two classes of massive galaxy.

AB - We present the catalogue and basic properties of sources in AS2UDS, an 870-\mum 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 >4.3σ significance across the ∼1°-diameter field. We combine our precise ALMA positions with the extensive multiwavelength coverage in the UDS field which yields spectral energy distributions for our SMGs and a median redshift of zphot = 2.61 ± 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 > 4.3σ SMG, but we demonstrate from stacking 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 zphot = 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 per cent 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 z ∼ 2, finding reasonable agreement - in support of an evolutionary connection between these two classes of massive galaxy.

KW - galaxies: High-redshift

KW - galaxies: Starburst

KW - submillimetre: Galaxies

UR - http://www.scopus.com/inward/record.url?scp=85070104229&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz1536

DO - 10.1093/mnras/stz1536

M3 - Article

SN - 0035-8711

VL - 487

SP - 4648

EP - 4668

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

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

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