Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published February 21, 2014 | Supplemental Material + Published + Submitted
Journal Article Open

Spectral energy distributions of type 1 AGN in XMM-COSMOS – II. Shape evolution

Abstract

The mid-infrared-to-ultraviolet (0.1–10 μm) spectral energy distribution (SED) shapes of 407 X-ray-selected radio-quiet type 1 active galactic nuclei (AGN) in the wide-field 'Cosmic Evolution Survey' (COSMOS) have been studied for signs of evolution. For a sub-sample of 200 radio-quiet quasars with black hole mass estimates and host galaxy corrections, we studied their mean SEDs as a function of a broad range of redshift, bolometric luminosity, black hole mass and Eddington ratio, and compared them with the Elvis et al. (E94) type 1 AGN mean SED. We found that the mean SEDs in each bin are closely similar to each other, showing no statistical significant evidence of dependence on any of the analysed parameters. We also measured the SED dispersion as a function of these four parameters, and found no significant dependences. The dispersion of the XMM-COSMOS SEDs is generally larger than E94 SED dispersion in the ultraviolet, which might be due to the broader 'window function' for COSMOS quasars, and their X-ray-based selection.

Additional Information

© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2013 November 21; received 2013 November 21; in original form 2012 October 10. HH thanks Belinda Wilkes and Martin J. Ward for discussion. This work was supported in part by NASA Chandra grant number G07-8136A (HH, ME, FC) and the Smithsonian Scholarly Studies (FC). Support from the Italian Space Agency (ASI) under the contracts ASI-INAF I/088/06/0 and I/009/10/0 is acknowledged (AC and CV). MS acknowledges support by the German Deutsche Forschungsgemeinschaft,DFG Leibniz Prize (FKZHA1850/28-1). KS gratefully acknowledges support from Swiss National Science Foundation Grant PP00P2_138979/1.

Attached Files

Published - MNRAS-2014-Hao-1288-304.pdf

Submitted - 1210.3033v2.pdf

Supplemental Material - table.zip

Files

1210.3033v2.pdf
Files (2.7 MB)
Name Size Download all
md5:aaf12cef0225609807da6ef9919c9c6b
1.1 MB Preview Download
md5:072c71cd253b2976b4af388d749b741a
25.1 kB Preview Download
md5:3ee0147e02fa109917da73f46bc199a4
1.5 MB Preview Download

Additional details

Created:
August 22, 2023
Modified:
October 26, 2023