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Astrophysics > Cosmology and Nongalactic Astrophysics

arXiv:1303.0219 (astro-ph)
[Submitted on 1 Mar 2013]

Title:The Distribution of AGN Covering Factors

Authors:Andy Lawrence, Isaac Roseboom, Jack Mayo, Martin Elvis, Yue Shen, Heng Hao, Sara Petty
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Abstract:We review our knowledge of the most basic properties of the AGN obscuring region - its location, scale, symmetry, and mean covering factor - and discuss new evidence on the distribution of covering factors in a sample of ~9000 quasars with WISE, UKIDSS, and SDSS photometry. The obscuring regions of AGN may be in some ways more complex than we thought - multi-scale, not symmetric, chaotic - and in some ways simpler - with no dependence on luminosity, and a covering factor distribution that may be determined by the simplest of considerations - e.g. random misalignments.
Comments: Proceedings of the Torus Workshop 2012 held at the University of Texas at San Antonio, 5-7 December 2012. C. Packham, R. Mason, and A. Alonso-Herrero (eds.). 8 pages, 5 figures
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Cite as: arXiv:1303.0219 [astro-ph.CO]
  (or arXiv:1303.0219v1 [astro-ph.CO] for this version)
  https://doi.org/10.48550/arXiv.1303.0219

Submission history

From: Andy Lawrence [view email]
[v1] Fri, 1 Mar 2013 16:50:08 UTC (537 KB)
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