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The Herschel Multi-Tiered Extragalactic Survey: SPIRE-mm Photometric RedshiftsWe investigate the potential of submm-mm and submm-mm-radio photometric red-shifts using a sample of mm-selected sources as seen at 250, 350 and 500 micrometers by the SPIRE instrument on Herschel. From a sample of 63 previously identified mm-sources with reliable radio identifications in the GOODS-N and Lockman Hole North fields 46 (73 per cent) are found to have detections in at least one SPIRE band. We explore the observed submm/mm colour evolution with redshift, finding that the colours of mm-sources are adequately described by a modified blackbody with constant optical depth Tau = (nu/nu(0))beta where beta = +1.8 and nu(0) = c/100 micrometers. We find a tight correlation between dust temperature and IR luminosity. Using a single model of the dust temperature and IR luminosity relation we derive photometric redshift estimates for the 46 SPIRE detected mm-sources. Testing against the 22 sources with known spectroscopic, or good quality optical/near-IR photometric, redshifts we find submm/mm photometric redshifts offer a redshift accuracy of |delta z|/(1+z) = 0.16 (less than |delta z| greater than = 0.51). Including constraints from the radio-far IR correlation the accuracy is improved to |delta z|/(1 + z) = 0.15 (less than |delta z| greater than = 0.45). We estimate the redshift distribution of mm-selected sources finding a significant excess at z greater than 3 when compared to 850 micrometer selected samples.
Document ID
20120002648
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Roseboom, I. G. (Sussex Univ. Brighton, United Kingdom)
Ivison, R. J. (Royal Observatory Edinburgh, United Kingdom)
Greve, T. R. (Niels Bohr Inst. Copenhagen, Denmark)
Amblard, A. (California Univ. Irvine, CA, United States)
Arumugam, V. (Royal Observatory Edinburgh, United Kingdom)
Auld, R. (Cardiff Univ. United Kingdom)
Aussel, H. (Paris VI Univ. France)
Bethermin, M. (Paris VI Univ. France)
Blain, A. (California Inst. of Tech. Pasadena, CA, United States)
Bock, J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Boselli, A. (Aix-Marseille Univ. Marseille, France)
Brisbin, D. (Cornell Univ. Ithaca, NY, United States)
Buat, V. (Aix-Marseille Univ. Marseille, France)
Burgarella, D. (Aix-Marseille Univ. Marseille, France)
Castro-Rodriguez, N. (Instituto de Astrofisica de Canarias Tenerife, Spain)
Cava, A. (Instituto de Astrofisica de Canarias Tenerife, Spain)
Chanial, P. (Paris VII Univ. France)
Chapin, E. (British Columbia Univ. Vancouver, British Columbia, Canada)
Chapman, S. (Cambridge Univ. Cambridge, United Kingdom)
Clements, D. L. (Imperial Coll. of London London, United Kingdom)
Conley, A. (Colorado Univ. Boulder, CO, United States)
Conversi, L. (European Space Astronomy Center (ESAC) Madrid, Spain)
Cooray, A. (California Univ. Irvine, CA, United States)
Dowell, C. D. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dwek, E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 25, 2013
Publication Date
November 18, 2011
Subject Category
Astronomy
Report/Patent Number
GSFC.JA.5683.2011
Funding Number(s)
CONTRACT_GRANT: ASI-I/005/07/0
CONTRACT_GRANT: UK STFC ST/F002858/1
Distribution Limits
Public
Copyright
Public Use Permitted.

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