2013/03/08 by D. J. Hanish, Harry I. Teplitz, H. I. Teplitz +26
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Infrared #Luminosity #Optics #Physics #Population #Quasar #Redshift #Rest frame #Sky #Spectral energy distribution #Spitzer Space Telescope #Telescope #Wavelength #astro-ph.CO
paper · pdf · doi:10.1088/0004-637x/768/1/13
published as 2013 ApJ 768 13 · 10 pages, 4 figures. Accepted for publication in ApJ
arxiv created 2013/03/08 · openalex publication_date 2013/04/09 · arxiv updated 2015/06/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.