The Unification of Powerful Quasars and Radio Galaxies and Their Relation to Other Massive Galaxies
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https://doi.org/10.1088/2041-8205/806/1/L11Metadata
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Podigachoski, Pece, Peter Barthel, Martin Haas, Christian Leipski, and Belinda Wilkes. 2015. “The Unification of Powerful Quasars and Radio Galaxies and Their Relation to Other Massive Galaxies.” The Astrophysical Journal 806 (1) (June 4): L11. doi:10.1088/2041-8205/806/1/l11.Abstract
The unification model for powerful radio galaxies (RGs) and radio-loud quasars postulates that these objects are intrinsically the same but viewed along different angles. Herschel Space Observatory data permit the assessment of that model in the far-infrared spectral window. We analyze photometry from Spitzer and Herschel for the distant 3CR hosts, and find that RGs and quasars have different mid-infrared, but indistinguishable far-infrared colors. Both these properties, the former being orientation dependent and the latter orientation invariant, are in line with expectations from the unification model. Adding powerful radio-quiet active galaxies and typical massive star-forming (SF) galaxies to the analysis, we demonstrate that infrared colors not only provide an orientation indicator, but can also distinguish active from SF galaxies.Other Sources
https://arxiv.org/abs/1505.03569Terms of Use
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http://nrs.harvard.edu/urn-3:HUL.InstRepos:30212127
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