The X-ray spectrum of modified alpha-viscosity accretion disks

Details The X-ray spectrum of modified alpha-viscosity accretion disks The X-ray spectrum of modified alpha-viscosity accretion disks

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...226..343n&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 226, no. 1, Dec. 1989, p. 343-346.

Statistics

Computation

4

Accretion Disks, Black Holes (Astronomy), Viscosity, X Ray Spectra, Astronomical Models, Computational Astrophysics, Neutron Stars, X Ray Binaries

Scientific paper

The X-ray spectrum emitted by the radiation pressure-dominated region of an accretion disk around a black hole is derived under the modified alpha-viscosity law, according to which the viscous stress tensor scales with the disk gas pressure alone. Due to the higher disk density, the surface temperature of the regions emitting a modified blackbody spectrum is lower than the temperature obtained in the standard alpha-viscosity model; the integrated disk spectrum is correspondingly softer.

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