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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 720053.0, MPI für Astronomie / Publikationen_mpia
The unification of powerful quasars and radio galaxies and their relation to other massive galaxies
Authors:Podigachoski, P.; Barthel, P.; Haas, M.; Leipski, C.; Wilkes, B.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:The Astrophysical Journal Letters
Volume:806
Issue / Number:1
Start Page:id. L11 (5 pp)
Audience:Not Specified
Abstract / Description: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
Free Keywords:galaxies: active; galaxies: formation; galaxies: high-redshift; galaxies: starburst; infrared: galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X
URL:http://cdsads.u-strasbg.fr/abs/2015ApJ...806L..11P
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