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Record Details

Record 4 of 50053
Relativistic enhancement of the Compton-reflected component in active galactic nuclei
External Online Source: doi:10.1086/170812
Author and Affiliation:
Rogers, R. D.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Abstract: Compton reflection may be an important process in AGNs, since it provides an improvement over power-law fits to AGN spectra observed by Ginga and can also explain the spectrum of the cosmic X-ray background. The fraction of the total X-ray luminosity which is incident upon a thin steady alpha-disk if the X-rays are produced by inverse-Compton scattering of soft, disk photons off relativistic electrons located above the disk is calculated. This fraction is called the Compton reflection covering factor, f, and it is found that it can range between 0.5 and 0.88. This large range in f, due to a relativistic kinematic effect first calculated in this connection by Ghisellini et al (1991) is sufficient to explain the typical covering (about 0.5) observed in bright AGNs by Ginga as well as the large covering factor (about 0.9) required to explain the cosmic X-ray background in the Compton reflection model.
Publication Date: Dec 20, 1991
Document ID:
19920035408
(Acquired Nov 22, 1995)
Accession Number: 92A18032
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 383; 550-553
Publisher Information: United States
Contract/Grant/Task Num: NAGW-931
Financial Sponsor: NASA; United States
Organization Source: Harvard-Smithsonian Center for Astrophysics; Cambridge, MA, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACCRETION DISKS; ACTIVE GALACTIC NUCLEI; COMPTON EFFECT; RELATIVISTIC THEORY; X RAY SOURCES; ASTRONOMICAL SPECTROSCOPY; BACKGROUND RADIATION; COMPUTATIONAL ASTROPHYSICS
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 383, Dec. 20, 1991, p. 550-553.
Availability Source: Other Sources
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