Turbulent accretion onto massive black holes

Journal Article · Tue May 15 04:00:00 EDT 1979 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/157080· OSTI ID:6250101

Maraschi, L; Perola, G C; Reina, C; Treves, A

Turbulent spherical accretion onto massive black holes (Mapprox.10/sup 6/--10/sup 9/ M/sub sun/) is considered. Temperatures of the order of 10/sup 9/--10/sup 10/ K are found in the inner zone where the synchrotron frequencies are 10/sup 13/--10/sup 14/ Hz. If the optical depth of the hole atmosphere is tauapprox.1, Comptonization can produce a power-law spectrum of index approx.1 from the synchrotron frequencies up to medium X-rays. If tau> or approx. =1, convection of radiation into the hole becomes important at small radii, reducing the efficiency of emission. The results are briefly compared with the observations.

• Research Organization: Instituto di Fisica Dell'Universita and Laboratorio di Fisica Cosmica del CNR, Milano, Italy
• OSTI ID: 6250101
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 230:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
BLACK HOLES
BREMSSTRAHLUNG
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY SPECTRA
GALAXIES
MAGNETIC FIELDS
MASSLESS PARTICLES
MATHEMATICAL MODELS
PHOTONS
RADIATIONS
SEYFERT GALAXIES
SPECTRA
STAR ACCRETION
STAR EVOLUTION
STAR MODELS
STELLAR ATMOSPHERES
SYNCHROTRON RADIATION
TURBULENCE