http://arxiv.org/abs/1603.03670
We compare covering factors of circumnuclear dusty obscurers in radio-loud and radio-quiet quasars. The radio-loud quasars are represented by a sample of FR~II quasars obtained by cross-matching a catalog of the FR~II radio sources selected by van Velzen et al. with the SDSS DR7 catalog of quasars. Covering factors of FR~II quasars are compared with covering factors of the radio-quiet quasars matched with them in redshift, black hole mass, and Eddington-ratio. We found that covering factors, proxied by the infrared-to-bolometric luminosity ratio, are on average slightly smaller in FR~II quasars than in radio-quiet quasars. For both samples, no statistically significant dependence of a median covering factor on Eddington ratio, black hole mass, nor redshift can be claimed.
M. Gupta, M. Sikora and K. Nalewajko
Mon, 14 Mar 16
4/47
Comments: Submitted to MNRAS, comments are welcome
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