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Record 1 of 133
On the origin of power-law X-ray spectra of active galactic nuclei
External Online Source: doi:10.1086/162711
Author and Affiliation:
Schlosman, I.(Florida, University, Gainesville, FL)
Shaham, J.(Jerusalem, Hebrew University, Jerusalem, Israel)
Shaviv, G.(Technion Israel Institute of Technology, Haifa, Israel)
Abstract: In 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.
Publication Date: Dec 15, 1984
Document ID:
19850041331
(Acquired Nov 28, 1995)
Accession Number: 85A23482
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 287; 534-537
Publisher Information: United States
Contract/Grant/Task Num: NSF PHY-80-23721; NAS8-30753; NAGW-567
Financial Sponsor: NASA; United States
Organization Source: Florida Univ.; Gainesville, FL, United States
Tel-Aviv Univ.; Ramat-Aviv, Tel-Aviv, Israel
Hebrew Univ.; Jerusalem, Israel
Columbia Univ.; New York, NY, United States
Technion - Israel Inst. of Tech.; Haifa, Israel
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACCRETION DISKS; ACTIVE GALACTIC NUCLEI; OPTICAL THICKNESS; QUASARS; SEYFERT GALAXIES; X RAY SPECTRA; BL LACERTAE OBJECTS; LUMINOSITY; POWER SPECTRA; SCHWARZSCHILD METRIC
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 287, Dec. 15, 1984, p. 534-537. Research supported by the L. Deutch Research Foundation.
Miscellaneous Notes: Research supported by the L. Deutch Research Foundation
Availability Source: Other Sources
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