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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2455

Title: The relevance of the Eddington limit to thick accretion disks
Authors: Nityananda, R.
Narayan, R.
Keywords: ACCRETION DISKS
GALACTIC NUCLEI
ACTIVE GALACTIC NUCLEI
BLACK HOLES (ASTRONOMY)
LUMINOSITY
OPTICAL THICKNESS
RADIATIVE TRANSFER
Issue Date: 1984
Publisher: Elsevier B.V.
Citation: Advances in Space Research, 1984, Vol.3, p319-321
Abstract: Thick accretion disks with narrow funnels around massive black holes are considered promising models for active galactic nuclei. These models assumed a supercritical accretion rate and emit collimated beams with super-Eddington luminosities. Approximate calculations of the interaction between the emerging radiation and the walls for an optically thin funnel are made. The results are sensitive to the sound velocity and to the viscosity parameter. They suggest that a significant particle luminosity can accompany the radiation in the super-Eddington case. By applying an Eddington type limit based on mechanical equilibrium to a suitably chosen interior surface in the disk, it is found that energy transport, if radiative, can strongly limit the efficiency of these models.
Description: Restricted Access. COSPAR, IAU, ESA, et al., Symposium on High-Energy Astrophysics and Cosmology, Pamporovo, Bulgaria, July 18-23, 1983.
URI: http://hdl.handle.net/2289/2455
ISSN: 0273-1177
Alternative Location: http://adsabs.harvard.edu/cgi-bin/bib_query?1984AdSpR...3..319N
http://dx.doi.org/10.1016/0273-1177(84)90109-1
Copyright: 1984 Elsevier B.V.
Appears in Collections:Research Papers (A&A)

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