Far-Infrared Properties of Type 1 Quasars

Abstract

We use the Spitzer Space Telescope Enhanced Imaging Products (SEIP) and the Spitzer Archival Far-InfraRed Extragalactic Survey (SAFIRES) to study the spectral energy distributions of spectroscopically confirmed type 1 quasars selected from the Sloan Digital Sky Survey (SDSS). By combining the Spitzer and SDSS data with the 2-Micron All Sky Survey (2MASS) we are able to construct a statistically robust rest-frame 0.1-100 micron type 1 quasar template. We find the quasar population is well-described by a single power-law SED at wavelengths less than 20 microns, 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 signifiant object-to-object dispersion in the SED. The mean excess reaches a maximum of 0.8 dex at rest-frame wavelengths near 100 microns.

10 pages, 4 figures. Accepted for publication in ApJ

References in corpus (5)

• The Spitzer Deep, Wide-Field Survey
• FIRST-2MASS Red Quasars: Transitional Objects Emerging from the Dust
• Properties of dusty tori in AGN: I. The Case of SWIRE/SDSS Quasars
• Spitzer and Herschel-based SEDs of 24um-bright z~0.3-3.0 starbursts and obscured quasars
• A Population of Dust-Rich Quasars at z ~ 1.5

Cited by in corpus (5)

• The Intrinsic Far-infrared Continua of Type-1 Quasars
• The Contribution of Host Galaxies to the Infrared Energy Output of $z\gtrsim 5.0$ QUASARS
• Herschel Survey of the Palomar-Green QSOs at Low Redshift
• Plasma Heating to Super-Hot Temperatures (>30 MK) in the August 9, 2011 Solar Flare
• The Spitzer Archival Far-InfraRed Extragalactic Survey