Physical Conditions in Obscuring Tori and Molecular Accretion Disks, and Are They Really the Same Thing?

Details Physical Conditions in Obscuring Tori and Molecular Accretion Disks, and Are They Really the Same Thing? Physical Conditions in Obscuring Tori and Molecular Accretion Disks, and Are They Really the Same Thing?

1998-09-11

arxiv.org/abs/astro-ph/9809143v1

Astronomy and Astrophysics

Astrophysics

8 pages, 2 figures. To appear in "Highly Redshifted Radio Lines", ed. C. Carilli, S. Radford, and G. Langston, ASP, in press

Scientific paper

The nature of the obscuring material in active galactic nuclei is still
uncertain. Although some sources, such as Cygnus A, show evidence for a
geometrically thick ``torus'' as originally suggested, recent work on the
radiation-driven warping instability discovered by Pringle suggests that
obscuration by thin, warped disks may play a crucial role in AGN.

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