Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...376...90l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 376, July 20, 1991, p. 90-94.
Astronomy and Astrophysics
Astronomy
478
Accretion Disks, Active Galactic Nuclei, Black Holes (Astronomy), Line Spectra, Stellar Rotation, X Ray Spectra, Iron, K Lines, Milky Way Galaxy, Spectrum Analysis
Scientific paper
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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