Title: On the origin of obscuring tori in the Galactic nucleus and active Galactic nuclei
Abstract: view Abstract Citations (15) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS On the Origin of Obscuring Tori in the Galactic Nucleus and Active Galactic Nuclei Yi, Insu ; Field, George B. ; Blackman, Eric G. Abstract Differences between Seyfert 1 and Seyfert 2 galaxies cant be explained by the existence of obscuring tori at distances a few parsecs from central black holes. In the Galaxy there exists a similar thick disk structure, the circumnuclear disk, at a distance ~1.7 pc from the Galactic center. We examine the possibility that both structures are the result of turbulence-supported viscous evolution and accumulation of accreted material in soft gravitational potentials of galactic nuclei. The accumulation occurs in a region where the gravitational potential provides reduced differential rotation compared with differential rotation in the neighboring regions. The existence of these structures requires that the ratio of the smooth background mass within ~ a few parsecs to the central black hole mass be of order 1. We also discuss how strong magnetic fields prevent such tori formation and suggest evolutionary possibilities consistent with our results. Publication: The Astrophysical Journal Pub Date: September 1994 DOI: 10.1086/187504 Bibcode: 1994ApJ...432L..31Y Keywords: Accretion Disks; Active Galactic Nuclei; Black Holes (Astronomy); Galactic Evolution; Interstellar Magnetic Fields; Seyfert Galaxies; Stellar Mass Ejection; Angular Momentum; Background Radiation; Mass Distribution; Astrophysics; ACCRETION; ACCRETION DISKS; BLACK HOLE PHYSICS; GALAXIES: ACTIVE; GALAXIES: MAGNETIC FIELDS; GALAXIES: NUCLEI; GALAXIES: SEYFERT full text sources ADS |
Publication Year: 1994
Publication Date: 1994-09-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 12
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