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Date and Time of the Query: 2019-06-18 T12:53:21 PDT
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For refcode 2014AJ....148...16S:
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2014AJ....148...16S Discordance of the Unified Scheme with Observed Properties of Quasars and High-excitation Galaxies in the 3CRR Sample Singal, Ashok K. Abstract. We examine the consistency of the unified scheme of Fanaroff-Riley type II radio galaxies and quasars with their observed number and size distributions in the 3CRR sample. We separate the low-excitation galaxies from the high-excitation ones, as the former might not harbor a quasar within and thus may not be partaking in the unified scheme models. In the updated 3CRR sample, at low redshifts (z < 0.5), the relative number and luminosity distributions of high-excitation galaxies and quasars roughly match the expectations from the orientation-based unified scheme model. However, a foreshortening in the observed sizes of quasars, which is a must in the orientation-based model, is not seen with respect to radio galaxies even when the low-excitation galaxies are excluded. This dashes the hope that the unified scheme might still work if one includes only the high-excitation galaxies. Key words: galaxies: active, galaxies: nuclei, quasars: general
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