Rights statement: © 2018. The American Astronomical Society. All rights reserved.
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Rights statement: © 2018. The American Astronomical Society. All rights reserved.
Final published version, 1.06 MB, PDF document
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - An ALMA Survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS Field
T2 - Number Counts of Submillimeter Galaxies
AU - Stach, Stuart M.
AU - Smail, Ian
AU - Swinbank, A. M.
AU - Simpson, J. M.
AU - Geach, J. E.
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 - Dunlop, J. S.
AU - Farrah, Duncan
AU - Gullberg, B.
AU - Hartley, W.
AU - Ivison, R. J.
AU - Maltby, D. T.
AU - Michałowski, M. J.
AU - Scott, Douglas
AU - Simpson, Chris
AU - Thomson, A. P.
AU - Wardlow, J. L.
AU - van der Werf, P.
N1 - © 2018. The American Astronomical Society. All rights reserved. Author was employed at another UK HEI at the time of submission and was deposited at Durham University Repository, see link http://dro.dur.ac.uk/25522/
PY - 2018/6/20
Y1 - 2018/6/20
N2 - We report the first results of AS2UDS, an 870 μm continuum survey with the Atacama Large Millimeter/Submillimeter Array (ALMA) of a total area of ˜50 arcmin2 comprising a complete sample of 716 submillimeter sources drawn from the SCUBA-2 Cosmology Legacy Survey (S2CLS) map of the UKIDSS/UDS field. The S2CLS parent sample covers a 0.96 degree2 field at σ 850 = 0.90 ± 0.05 mJy beam-1. Our deep, high-resolution ALMA observations with σ 870 ˜ 0.25 mJy and a 0.″15-0.″30 FWHM synthesized beam, provide precise locations for 695 submillimeter galaxies (SMGs) responsible for the submillimeter emission corresponding to 606 sources in the low-resolution, single-dish map. We measure the number counts of SMGs brighter than S 870 ≥ 4 mJy, free from the effects of blending and show that the normalization of the counts falls by 28% ± 2% in comparison with the SCUBA-2 published counts, but that the shape remains unchanged. We determine that {44}-14+16% of the brighter single-dish sources with S 850 ≥ 9 mJy consist of a blend of two or more ALMA-detectable SMGs brighter than S 870 ˜ 1 mJy (corresponding to a galaxy with a total-infrared luminosity of L IR ≳ 1012 L ⊙), in comparison with 28% ± 2% for the single-dish sources at S 850 ≥ 5 mJy. Using the 46 single-dish submillimeter sources that contain two or more ALMA-detected SMGs with photometric redshifts, we show that there is a significant statistical excess of pairs of SMGs with similar redshifts (
AB - We report the first results of AS2UDS, an 870 μm continuum survey with the Atacama Large Millimeter/Submillimeter Array (ALMA) of a total area of ˜50 arcmin2 comprising a complete sample of 716 submillimeter sources drawn from the SCUBA-2 Cosmology Legacy Survey (S2CLS) map of the UKIDSS/UDS field. The S2CLS parent sample covers a 0.96 degree2 field at σ 850 = 0.90 ± 0.05 mJy beam-1. Our deep, high-resolution ALMA observations with σ 870 ˜ 0.25 mJy and a 0.″15-0.″30 FWHM synthesized beam, provide precise locations for 695 submillimeter galaxies (SMGs) responsible for the submillimeter emission corresponding to 606 sources in the low-resolution, single-dish map. We measure the number counts of SMGs brighter than S 870 ≥ 4 mJy, free from the effects of blending and show that the normalization of the counts falls by 28% ± 2% in comparison with the SCUBA-2 published counts, but that the shape remains unchanged. We determine that {44}-14+16% of the brighter single-dish sources with S 850 ≥ 9 mJy consist of a blend of two or more ALMA-detectable SMGs brighter than S 870 ˜ 1 mJy (corresponding to a galaxy with a total-infrared luminosity of L IR ≳ 1012 L ⊙), in comparison with 28% ± 2% for the single-dish sources at S 850 ≥ 5 mJy. Using the 46 single-dish submillimeter sources that contain two or more ALMA-detected SMGs with photometric redshifts, we show that there is a significant statistical excess of pairs of SMGs with similar redshifts (
KW - galaxies: high-redshift
KW - galaxies: starburst
U2 - 10.3847/1538-4357/aac5e5
DO - 10.3847/1538-4357/aac5e5
M3 - Journal article
VL - 860
JO - The Astrophysical Journal
JF - The Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 161
ER -