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Persistent URL http://purl.org/net/epubs/work/10919261
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Record Id 10919261
Title A POPULATION OF DUST-RICH QUASARS AT z similar to 1.5
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Abstract We report Herschel SPIRE (250, 350, and 500 ?m) detections of 32 quasars with redshifts 0.5 ?z < 3.6 from the Herschel Multi-tiered Extragalactic Survey (HerMES). These sources are from a MIPS 24 ?m flux-limited sample of 326 quasars in the Lockman Hole Field. The extensive multi-wavelength data available in the field permit construction of the rest-frame spectral energy distributions (SEDs) from ultraviolet to the mid-infrared for all sources, and to the far-infrared (FIR) for the 32 objects. Most quasars with Herschel FIR detections show dust temperatures in the range of 25-60K, with a mean of 34K. The FIR luminosities range from 10 to 10 L, qualifying most of their hosts as ultra- or hyper-luminous infrared galaxies. These FIR-detected quasars may represent a dust-rich population, but with lower redshifts and fainter luminosities than quasars observed at 1mm. However, their FIR properties cannot be predicted from shorter wavelengths (0.3-20 ?m, rest frame), and the bolometric luminosities derived using the 5100Å index may be underestimated for these FIR-detected quasars. Regardless of redshift, we observed a decline in the relative strength of FIR luminosities for quasars with higher near-infrared luminosities. © 2012. The American Astronomical Society. All rights reserved.
Organisation STFC , RALSP , RALSP - SPD
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Language English (EN)
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Journal Article Astrophys J 753, no. 1 (2012): 33. doi:10.1088/0004-637X/753/1/33 2012
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