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350 μm dust emission from high-redshift quasars

Beelen, Alexandre and Cox, Pierre and Benford, Dominic J. and Dowell, C. Darren and Kovács, Attila and Bertoldi, Frank and Omont, Alain and Carilli, Chris L. (2006) 350 μm dust emission from high-redshift quasars. Astrophysical Journal, 642 (2). pp. 694-701. ISSN 0004-637X. doi:10.1086/500636.

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We report detections of six high-redshift (1.8 ≤ z ≤ 6.4), optically luminous, radio-quiet quasars at 350 μm, using the SHARC II bolometer camera at the Caltech Submillimeter Observatory. Our observations double the number of high-redshift quasars for which 350 μm photometry is available. By combining the 350 μm measurements with observations at other submillimeter/millimeter wavelengths, for each source we have determined the temperature of the emitting dust (ranging from 40 to 60 K) and the far-infrared luminosity [(0.6-2.2) × 10^(13) L⊙]. The combined mean spectral energy distribution of all high-redshift quasars with two or more rest-frame far-infrared photometric measurements is best fit with a graybody with temperature of 47 ± 3 K and a dust emissivity power-law spectral index of β = 1.6 ± 0.1. This warm dust component is a good tracer of the starburst activity of the quasar host galaxy. The ratio of the far-infrared to radio luminosities of infrared-luminous, radio-quiet high-redshift quasars is consistent with that found for local star-forming galaxies.

Item Type:Article
Related URLs:
URLURL TypeDescription
Cox, Pierre0000-0003-2027-8221
Benford, Dominic J.0000-0002-9884-4206
Bertoldi, Frank0000-0002-1707-1775
Omont, Alain0000-0002-4721-3922
Carilli, Chris L.0000-0001-6647-3861
Additional Information:© 2006 The American Astronomical Society. Received 2005 September 26; accepted 2005 December 6. The CSO is funded by the NSF under contract AST 02-29008. A. B. acknowledges financial support from the Programme National de Galaxies. We thank A. Jones and F. Boulanger for fruitful discussions on the subject of this work.
Funding AgencyGrant Number
NSFAST 02-29008
Programme National de GalaxiesUNSPECIFIED
Subject Keywords:galaxies: evolution; galaxies: starburst; infrared: galaxies; infrared: ISM; quasars: individual (APM 08279+5255, HS 1002+4400, KUV 08086+4037, J1409+5628, PSS 2322+1944, SDSS J1148+5251)
Issue or Number:2
Record Number:CaltechAUTHORS:20110216-102922057
Persistent URL:
Official Citation:350 μm Dust Emission from High-Redshift Quasars Alexandre Beelen, Pierre Cox, Dominic J. Benford, C. Darren Dowell, Attila Kovács, Frank Bertoldi, Alain Omont, and Chris L. Carilli doi: 10.1086/500636
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22242
Deposited By: Ruth Sustaita
Deposited On:16 Feb 2011 19:32
Last Modified:09 Nov 2021 16:04

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