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Far-infrared Properties of Type 1 Quasars

Hanish, D. J. and Teplitz, H. I. and Capak, P. and Desai, V. and Armus, L. and Brinkworth, C. and Brooke, T. and Colbert, J. and Fadda, D. and Frayer, D. T. and Huynh, M. and Lacy, M. and Murphy, E. and Noriega-Crespo, A. and Paladini, R. and Scarlata, C. and Shenoy, S. (2013) Far-infrared Properties of Type 1 Quasars. Astrophysical Journal, 768 (1). Art. No. 13. ISSN 0004-637X. doi:10.1088/0004-637X/768/1/13.

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We use the Spitzer Space Telescope Enhanced Imaging Products and the Spitzer Archival Far-InfraRed Extragalactic Survey to study the spectral energy distributions (SEDs) of spectroscopically confirmed type 1 quasars selected from the Sloan Digital Sky Survey (SDSS). By combining the Spitzer and SDSS data with the Two Micron All Sky Survey, we are able to construct a statistically robust rest-frame 0.1-100 μm type 1 quasar template. We find that the quasar population is well-described by a single power-law SED at wavelengths less than 20 μm, in good agreement with previous work. However, at longer wavelengths, we find a significant excess in infrared luminosity above an extrapolated power-law, along with significant object-to-object dispersion in the SED. The mean excess reaches a maximum of 0.8 dex at rest-frame wavelengths near 100 μm.

Item Type:Article
Related URLs:
URLURL TypeDescription
Teplitz, H. I.0000-0002-7064-5424
Capak, P.0000-0003-3578-6843
Desai, V.0000-0002-1340-0543
Armus, L.0000-0003-3498-2973
Fadda, D.0000-0002-3698-7076
Frayer, D. T.0000-0003-1924-1122
Lacy, M.0000-0002-3032-1783
Murphy, E.0000-0001-7089-7325
Noriega-Crespo, A.0000-0002-6296-8960
Paladini, R.0000-0002-5158-243X
Scarlata, C.0000-0002-9136-8876
Additional Information:© 2013 American Astronomical Society. Received 2012 October 5; accepted 2013 March 2; published 2013 April 9. Support for this work was provided by NASA through contract NASA-ADAP NNX10AD52G. This publication makes use of (1) raw data from the Spitzer Space Telescope, operated by the Jet Propulsion Laboratory/California Institute of Technology under NASA contract, (2) data products from the Two Micron All Sky Survey, a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by NASA and the NSF, and (3) the SDSS, managed by the Astrophysical Research Consortium for the Participating Institutions and funded by the Alfred P. Sloan Foundation, the Participating Institutions, and many others.
Group:COSMOS, Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Alfred P. Sloan FoundationUNSPECIFIED
Subject Keywords:galaxies: active; infrared: galaxies; quasars: general; surveys
Issue or Number:1
Record Number:CaltechAUTHORS:20130603-102636844
Persistent URL:
Official Citation:Far-infrared Properties of Type 1 Quasars D. J. Hanish, H. I. Teplitz, P. Capak, V. Desai, L. Armus, C. Brinkworth, T. Brooke, J. Colbert, D. Fadda, D. Frayer, M. Huynh, M. Lacy, E. Murphy, A. Noriega-Crespo, R. Paladini, C. Scarlata, and S. Shenoy doi:10.1088/0004-637X/768/1/13
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38753
Deposited By: Ruth Sustaita
Deposited On:03 Jun 2013 17:41
Last Modified:09 Nov 2021 23:39

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