Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:1003.2647)
· On-line Data
· References in the article
· Citations to the Article (37) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (5)
· Associated Articles
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
A joint analysis of BLAST 250-500 mum and LABOCA 870 mum observations in the Extended Chandra Deep Field-South
Authors:
Chapin, Edward L.; Chapman, Scott C.; Coppin, Kristen E.; Devlin, Mark J.; Dunlop, James S.; Greve, Thomas R.; Halpern, Mark; Hasselfield, Matthew F.; Hughes, David H.; Ivison, Rob J.; Marsden, Gaelen; Moncelsi, Lorenzo; Netterfield, Calvin B.; Pascale, Enzo; Scott, Douglas; Smail, Ian; Viero, Marco; Walter, Fabian; Weiss, Axel; van der Werf, Paul
Affiliation:
AA(Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada), AB(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA), AC(Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE), AD(Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USA), AE(SUPA Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ), AF(Max-Planck-Institut für Astronomie, Königstuhl 17 D-69117, Heidelberg, Germany; Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark), AG(Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada), AH(Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada), AI(Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Aptdo. Postal 51 y 216, Puebla, Mexico), AJ(SUPA Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ; UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ), AK(Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada), AL(School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff CF24 3AA), AM(Department of Astronomy & Astrophysics, University of Toronto, 50 St George Street Toronto, ON M5S 3H4, Canada; Department of Physics, University of Toronto, 60 St George Street, Toronto, ON M5S 1A7, Canada), AN(School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff CF24 3AA), AO(Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada), AP(Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE), AQ(Department of Astronomy & Astrophysics, University of Toronto, 50 St George Street Toronto, ON M5S 3H4, Canada), AR(Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany), AS(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, Bonn D-53121, Germany), AT(Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 411, Issue 1, pp. 505-549. (MNRAS Homepage)
Publication Date:
02/2011
Origin:
WILEY
Astronomy Keywords:
galaxies: formation, galaxies: high-redshift, submillimetre: galaxies
Abstract Copyright:
© 2010 The Authors. Journal compilation © 2010 RAS
DOI:
10.1111/j.1365-2966.2010.17697.x
Bibliographic Code:
2011MNRAS.411..505C

Abstract

We present a joint analysis of the overlapping Balloon-borne Large Aperture Submillimetre Telescope (BLAST) 250, 350, 500 mum, and LABOCA 870 mum observations [from the LABOCA ECDFS Submm Survey (LESS) survey] of the Extended Chandra Deep Field-South. Out to z˜ 3, the BLAST filters sample near the peak wavelength of thermal far-infrared (FIR) emission from galaxies (rest-frame wavelengths ˜60-200 mum), primarily produced by dust heated through absorption in star-forming clouds. However, identifying counterparts to individual BLAST peaks is very challenging, given the large beams [full-width at half-maximum (FWHM) 36-60 arcsec]. In contrast, the ground-based 870 mum observations have a significantly smaller 19 arcsec FWHM beam, and are sensitive to higher redshifts (z˜ 1-5, and potentially beyond) due to the more favourable negative K-correction. We use the LESS data, as well as deep Spitzer and VLA imaging, to identify 118 individual sources that produce significant emission in the BLAST bands. We characterize the temperatures and FIR luminosities for a subset of 69 sources which have well-measured submillimetre (submm) spectral energy distributions (SEDs) and redshift measurements out to z˜ 3. For flux-limited sub-samples in each BLAST band, and a dust emissivity index beta= 2.0, we find a median temperature T= 30 K (all bands) as well as median redshifts: z= 1.1 (interquartile range 0.2-1.9) for S250 > 40 mJy; z= 1.3 (interquartile range 0.6-2.1) for S350 > 30 mJy; and z= 1.6 (interquartile range 1.3-2.3) for S500 > 20 mJy. Taking into account the selection effects for our survey (a bias towards detecting lower-temperature galaxies), we find no evidence for evolution in the local FIR-temperature correlation out to z˜ 2.5. Comparing with star-forming galaxy SED templates, about 8 per cent of our sample appears to exhibit significant excesses in the radio and/or mid-IR, consistent with those sources harbouring active galactic nuclei (AGN). Since our statistical approach differs from most previous studies of submm galaxies, we describe the following techniques in two appendices: our `matched filter' for identifying sources in the presence of point-source confusion; and our approach for identifying counterparts using likelihood ratios. This study is a direct precursor to future joint FIR/submm surveys, for which we outline a potential identification and SED measurement strategy.

Associated Articles

Source Paper     Catalog Description    


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints