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BLAST: The Redshift Survey

Eales, Stephen and Chapin, Edward L. and Devlin, Mark J. and Dye, Simon and Halpern, Mark and Hughes, David H. and Marsden, Gaelen and Mauskopf, Philip and Moncelsi, Lorenzo and Netterfield, Calvin B. and Pascale, Enzo and Patanchon, Guillaume and Raymond, Gwenifer and Rex, Marie and Scott, Douglas and Semisch, Christopher and Siana, Brian and Truch, Matthew D. P. and Viero, Marco P. (2009) BLAST: The Redshift Survey. Astrophysical Journal, 707 (2). pp. 1779-1808. ISSN 0004-637X.

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The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) has recently surveyed ≃ 8.7 deg^2 centered on Great Observatories Origins Deep Survey-South at 250, 350, and 500 μm. In Dye et al., we presented the catalog of sources detected at 5σ in at least one band in this field and the probable counterparts to these sources in other wavebands. In this paper, we present the results of a redshift survey in which we succeeded in measuring redshifts for 82 of these counterparts. The spectra show that the BLAST counterparts are mostly star-forming galaxies but not extreme ones when compared to those found in the Sloan Digital Sky Survey. Roughly one quarter of the BLAST counterparts contain an active nucleus. We have used the spectroscopic redshifts to carry out a test of the ability of photometric redshift methods to estimate the redshifts of dusty galaxies, showing that the standard methods work well even when a galaxy contains a large amount of dust. We have also investigated the cases where there are two possible counterparts to the BLAST source, finding that in at least half of these there is evidence that the two galaxies are physically associated, either because they are interacting or because they are in the same large-scale structure. Finally, we have made the first direct measurements of the luminosity function in the three BLAST bands. We find strong evolution out to z = 1, in the sense that there is a large increase in the space density of the most luminous galaxies. We have also investigated the evolution of the dust-mass function, finding similar strong evolution in the space density of the galaxies with the largest dust masses, showing that the luminosity evolution seen in many wavebands is associated with an increase in the reservoir of interstellar matter in galaxies.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Halpern, Mark0000-0002-1760-0868
Mauskopf, Philip0000-0001-6397-5516
Moncelsi, Lorenzo0000-0002-4242-3015
Pascale, Enzo0000-0002-3242-8154
Scott, Douglas0000-0002-6878-9840
Siana, Brian0000-0002-4935-9511
Additional Information:© 2009 The American Astronomical Society. Received 2009 July 14; accepted 2009 October 7; published 2009 December 7. We are grateful to Heath Jones for his help with the observations and Rob Sharp for his help with the 2dfdr data-reduction pipeline. This work makes use of the Runz redshifting code developed by Will Sutherland, Will Saunders, Russell Cannon and Scott Croom, and we are grateful to Scott Croom for making this available to us. We thank Seb Oliver for making available the SWIRE optical images and for a useful conversation about the SWIRE photometric redshift method and Luca Cortese for emergency help with IRAF. We acknowledge the support of NASA through grant numbers NAG5-12785, NAG5-13301 and NNGO-6GI11G, the NSF Office of Polar Programs, the Canadian Space Agency, the National Sciences and Engineering Research Council of Canada and the UK Science and Technology Facilities Council. This paper relies on observations made with the AAOmega spectrograph on the Anglo-Australian Telescope, and we thank the staff of the telescope and especially those involved in the development of the spectrograph.
Funding AgencyGrant Number
Canadian Space Agency (CSA)UNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Subject Keywords:galaxies: evolution; galaxies: high-redshift; submillimeter; surveys
Issue or Number:2
Record Number:CaltechAUTHORS:20100105-144533181
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Official Citation:BLAST: The Redshift Survey Stephen Eales, Edward L. Chapin, Mark J. Devlin, Simon Dye, Mark Halpern, David H. Hughes, Gaelen Marsden, Philip Mauskopf, Lorenzo Moncelsi, Calvin B. Netterfield, Enzo Pascale, Guillaume Patanchon, Gwenifer Raymond, Marie Rex, Douglas Scott, Christopher Semisch, Brian Siana, Matthew D. P. Truch, and Marco P. Viero 2009 ApJ 707 1779-1808 doi: 10.1088/0004-637X/707/2/1779
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17067
Deposited By: Tony Diaz
Deposited On:06 Jan 2010 18:02
Last Modified:09 Mar 2020 13:19

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