The SCUBA-2 Cosmology Legacy Survey: ALMA Resolves the Rest-frame Far-infrared Emission of Sub-millimeter Galaxies

J. M. Simpson, Ian Smail, A. M. Swinbank, O. Almaini, A. W. Blain, Malcolm Bremer, S. C. Chapman, Chian-Chou Chen, C. Conselice, K. E. K. Coppin, A. L. R. Danielson, J. S. Dunlop, A. C. Edge, D. Farrah, J. E. Geach, W. G. Hartley, R. J. Ivison, A. Karim, C. Lani, Cheng-Jiun MaR. Meijerink, M. J. Michałowski, A. Mortlock, D Scott, C. J. Simpson, M. Spaans, A. P. Thomson, E. van Kampen, P. P. van der Werf

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Abstract

We present high-resolution (0.''3) Atacama Large Millimeter Array 870μm imaging of 52 sub-millimeter galaxies (SMGs) in the Ultra DeepSurvey field to investigate the size and morphology of thesub-millimeter (sub-mm) emission on 2-10 kpc scales. We derive a medianintrinsic angular size of FWHM = 0.''30 ± 0.''04 for the 23 SMGsin the sample detected at a signal-to-noise ratio (S/N) >10. Usingthe photometric redshifts of the SMGs we show that this corresponds to amedian physical half-light diameter of 2.4 ± 0.2 kpc. A stackinganalysis of the SMGs detected at S/N
Original languageEnglish
Article number81
Number of pages14
JournalAstrophysical Journal
Volume799
Issue number1
Early online date16 Jan 2015
DOIs
Publication statusPublished - 20 Jan 2015

Keywords

  • galaxies: high-redshift
  • galaxies: starburst

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