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Title:
Line profiles from a disk around a rotating black hole
Authors:
Laor, Ari
Affiliation:
AA(Institute for Advanced Study, Princeton, NJ)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 376, July 20, 1991, p. 90-94. (ApJ Homepage)
Publication Date:
07/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Accretion Disks, Active Galactic Nuclei, Black Holes (Astronomy), Line Spectra, Stellar Rotation, X Ray Spectra, Iron, K Lines, Milky Way Galaxy, Spectrum Analysis
DOI:
10.1086/170257
Bibliographic Code:
1991ApJ...376...90L

Abstract

The present calculations of line profiles emitted from an accretion disk around a rotating black hole were conducted for a number of line emissivity laws and with emphasis on cases where most of the flux has its origin in the inner regions of the disk. Most emissivity laws produce a broad, single-peaked line; the line is significantly asymmetric in most cases, with a deep blue wing and an extended red wing. The line peak is in most cases blueshifted, and such strong relativistic effects as a blueshift of over 30 percent are uniquely associated with rotating black holes. Since extant observations show no such effects, most of the observed line is generated outside the innermost disk.

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