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The SCUBA HAlf Degree Extragalactic Survey - VI. 350-μm mapping of submillimetre galaxies.

Coppin, K. and Halpern, M. and Scott, D. and Borys, C. and Dunlop, J. and Dunne, L. and Ivison, R. and Wagg, J. and Aretxaga, I. and Battistelli, E. and Benson, A. and Blain, A. and Chapman, S. and Clements, D. and Dye, S. and Farrah, D. and Hughes, D. and Jenness, T. and van Kampen, E. and Lacey, C. and Mortier, A. and Pope, A. and Priddey, R. and Serjeant, S. and Smail, I. and Stevens, J. and Vaccari, M. (2008) 'The SCUBA HAlf Degree Extragalactic Survey - VI. 350-μm mapping of submillimetre galaxies.', Monthly notices of the Royal Astronomical Society., 384 (4). pp. 1597-1610.


A follow-up survey using the Submillimetre High-Angular Resolution Camera (SHARC-II) at 350 μm has been carried out to map the regions around several 850-μm-selected sources from the Submillimetre HAlf Degree Extragalactic Survey (SHADES). These observations probe the infrared (IR) luminosities and hence star formation rates in the largest existing, most robust sample of submillimetre galaxies (SMGs). We measure 350-μm flux densities for 24 850-μm sources, seven of which are detected at ≥2.5σ within a 10 arcsec search radius of the 850-μm positions. When results from the literature are included the total number of 350-μm flux density constraints of SHADES SMGs is 31, with 15 detections. We fit a modified blackbody to the far-IR (FIR) photometry of each SMG, and confirm that typical SMGs are dust-rich (Mdust≃ 9 × 108M⊙), luminous (LFIR≃ 2 × 1012L⊙) star-forming galaxies with intrinsic dust temperatures of ≃35 K and star formation rates of ≃400 M⊙ yr−1. We have measured the temperature distribution of SMGs and find that the underlying distribution is slightly broader than implied by the error bars, and that most SMGs are at 28 K with a few hotter. We also place new constraints on the 350-μm source counts, N350(>25 mJy) ∼ 200–500 deg−2.

Item Type:Article
Keywords:Surveys, Galaxies: formation, Galaxies: high-redshift, Galaxies: starburst, Cosmology: observations, Submillimetre.
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Publisher statement:This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2008 The Authors. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
Date accepted:No date available
Date deposited:29 January 2015
Date of first online publication:March 2008
Date first made open access:No date available

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