FAR-INFRARED PROPERTIES OF TYPE 1 QUASARS

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...

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Published inThe Astrophysical journal Vol. 768; no. 1; pp. 1 - 9
Main Authors Hanish, D J, Teplitz, H I, CAPAK, P, Desai, V, Armus, L, Brinkworth, C, Brooke, T, Colbert, J, Fadda, D, Frayer, D
Format Journal Article
LanguageEnglish
Published United States 01.05.2013
Subjects
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
DISPERSIONS
ENERGY SPECTRA
Extrapolation
GALAXIES
Infrared
LUMINOSITY
QUASARS
Sky surveys (astronomy)
SPACE
Space telescopes
Spectral energy distribution
WAVELENGTHS
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Summary: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 mu m type 1 quasar template. We find that the quasar population is well-described by a single power-law SED at wavelengths less than 20 mu m, 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 mu m.
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ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/768/1/13