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  • Simpson, J. M.Durham University (author)

AN ALMA SURVEY OF SUBMILLIMETER GALAXIES IN THE EXTENDED CHANDRA DEEP FIELD SOUTH: THE REDSHIFT DISTRIBUTION AND EVOLUTION OF SUBMILLIMETER GALAXIES

  • Article/chapterEnglish2014

Publisher, publication year, extent ...

  • 2014-05-30
  • American Astronomical Society,2014
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:d1d2ded8-9103-4de5-b785-c9347efb07f6
  • https://doi.org/10.1088/0004-637x/788/2/125DOI
  • https://research.chalmers.se/publication/200617URI

Supplementary language notes

  • Language:English
  • Summary in:English

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Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We present the first photometric redshift distribution for a large sample of 870 mu m submillimeter galaxies (SMGs) with robust identifications based on observations with ALMA. In our analysis we consider 96 SMGs in the Extended Chandra Deep Field South, 77 of which have 4-19 band photometry. We model the SEDs for these 77 SMGs, deriving a median photometric redshift of z(phot) = 2.3 +/- 0.1. The remaining 19 SMGs have insufficient photometry to derive photometric redshifts, but a stacking analysis of Herschel observations confirms they are not spurious. Assuming that these SMGs have an absolute H-band magnitude distribution comparable to that of a complete sample of z similar to 1-2 SMGs, we demonstrate that they lie at slightly higher redshifts, raising the median redshift for SMGs to zphot = 2.5 +/- 0.2. Critically we show that the proportion of galaxies undergoing an SMG-like phase at z >= 3 is at most 35% +/- 5% of the total population. We derive a median stellar mass of M star = (8 +/- 1) x 10(10) M circle dot, although there are systematic uncertainties of up to 5 x for individual sources. Assuming that the star formation activity in SMGs has a timescale of similar to 100 Myr, we show that their descendants at z similar to 0 would have a space density and MH distribution that are in good agreement with those of local ellipticals. In addition, the inferred mass-weighted ages of the local ellipticals broadly agree with the look-back times of the SMG events. Taken together, these results are consistent with a simple model that identifies SMGs as events that form most of the stars seen in the majority of luminous elliptical galaxies at the present day.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Swinbank, A. M.Durham University (author)
  • Smail, I.Durham University (author)
  • Alexander, D. M.Durham University (author)
  • Brandt, W. N.Pennsylvania State University (author)
  • Bertoldi, F.Universität Bonn,University of Bonn (author)
  • De Breuck, C.European Southern Observatory (ESO) (author)
  • Chapman, S. C.Dalhousie University (author)
  • Coppin, K. E. K.University of Hertfordshire (author)
  • da Cunha, E.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Danielson, A. L. R.Durham University (author)
  • Dannerbauer, H.Universität Wien,University of Vienna (author)
  • Greve, T. R.University College London (UCL) (author)
  • Hodge, J. A.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Ivison, R. J.University of Edinburgh (author)
  • Karim, A.Universität Bonn,University of Bonn (author)
  • Knudsen, Kirsten Kraiberg,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kraiberg (author)
  • Poggianti, B. M.Istituto nazionale di astrofisica (INAF) (author)
  • Schinnerer, E.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Thomson, A. P.Durham University (author)
  • Walter, F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Wardlow, J. L.Niels Bohr Institute,University of California at Irvine (UCI) (author)
  • Weiss, A.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • van der Werf, P.P.Universiteit Leiden (UL),Leiden University (UL) (author)
  • Durham UniversityPennsylvania State University (creator_code:org_t)

Related titles

  • In:Astrophysical Journal: American Astronomical Society788:21538-43570004-637X

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