1998/09/10 by Philip R. Maloney, Maloney, Philip R.
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9809143
8 pages, 2 figures. To appear in "Highly Redshifted Radio Lines", ed. C. Carilli, S. Radford, and G. Langston, ASP, in press
openalex publication_date 1998/09/10 · arxiv created 1998/09/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The nature of the obscuring material in active galactic nuclei is still\nuncertain. Although some sources, such as Cygnus A, show evidence for a\ngeometrically thick ``torus'' as originally suggested, recent work on the\nradiation-driven warping instability discovered by Pringle suggests that\nobscuration by thin, warped disks may play a crucial role in AGN.\n