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On the origin of power-law X-ray spectra of active galactic nucleiIn the present analytical model for a power law X-ray continuum production in active galactic nuclei, the dissipation of turbulent energy flux above the accretion disk forms an optically thin transition layer with an inverted temperature gradient. The emitted thermal radiation has a power law spectrum in the 0.1-100 keV range, with a photon energy spectral index gamma of about 0.4-1.0. Thermal X-ray contribution from the layer is 5-10 percent of the total disk luminosity. The gamma value of 0.75 is suggested as a 'natural' power law index for Seyfert galaxies and QSOs.
Document ID
19850041331
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Schlosman, I.
(Florida, University Gainesville, FL; Tel Aviv University, Tel Aviv, Israel)
Shaham, J.
(Jerusalem, Hebrew University Jerusalem, Israel; Columbia University, New York, NY, United States)
Shaviv, G.
(Technion Israel Institute of Technology Haifa, Israel)
Date Acquired
August 12, 2013
Publication Date
December 15, 1984
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 287
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A23482
Funding Number(s)
CONTRACT_GRANT: NAGW-567
CONTRACT_GRANT: NAS8-30753
CONTRACT_GRANT: NSF PHY-80-23721
Distribution Limits
Public
Copyright
Other

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