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

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posted on 2012-10-24, 08:54 authored by K. Coppin, M. Halpern, D. Scott, E. Battistelli, A. Pope, C. Lacey, I. Smail, C. Borys, J. Dunlop, R. Ivison, A. Mortier, L. Dunne, J. Wagg, I. Aretxaga, D. Hughes, A. Benson, A. Blain, S. Chapman, D. Clements, S. Dye, D. Farrah, T. Jenness, Van Kampen E., R. Priddey, J. Stevens, S. Serjeant, M. Vaccari
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.

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Citation

Monthly Notices of the Royal Astronomical Society, 2008, 384 (4), pp. 1597-1610

Version

  • VoR (Version of Record)

Published in

Monthly Notices of the Royal Astronomical Society

Publisher

Royal Astronomical Society (RAS)

issn

0035-8711

eissn

1365-2966

Copyright date

2008

Available date

2012-10-24

Publisher version

http://mnras.oxfordjournals.org/content/384/4/1597

Language

en

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