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Title:
Spitzer Observations of Powerful Radio Sources
Authors:
Cleary, K.; Lawrence, C. R.; Marshall, J. A.; Hao, L.; Meier, D.
Publication:
The Central Engine of Active Galactic Nuclei, ASP Conference Series, Vol. 373, proceedings of the conference held 16-21 October, 2006 at Xi'an Jioatong University, Xi'an, China. Edited by Luis C. Ho and Jian-Min Wang, p.475
Publication Date:
10/2007
Origin:
ASP
Bibliographic Code:
2007ASPC..373..475C

Abstract

We have measured the mid-infrared radiation from an orientation-unbiased sample of 3C RR galaxies and quasars with 0.4<z<1.2 using the IRS and MIPS instruments aboard the Spitzer Space Telescope. We fit the Spitzer data as well as other measurements from the literature with synchrotron and dust components. At 15 microns, quasars are typically four times brighter than radio galaxies with the same isotropic radio power. Based on our fits, half of this difference can be attributed to the presence of non-thermal emission in the quasars but not the radio galaxies. The other half is consistent with dust absorption in the radio galaxies but not the quasars.
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