High energy spectrum of spherically accreting black holes
Abstract
Spherically accreting black holes may sustain strong collisionless shocks, downstream of which the fluid approximation is not valid. The proton-electron Coulomb exchange provides for the downstream matter diffusion into the hole. Energy conversion efficiencies upward of 10-30% are obtained, with most of the luminosity in hard X-rays and γ-rays. We discuss the whole spectrum and its application for radio-quiet QSO's and galactic X- and γ-ray sources.
- Publication:
-
Positron-Electron Pairs in Astrophysics
- Pub Date:
- July 1983
- DOI:
- 10.1063/1.34109
- Bibcode:
- 1983AIPC..101..348M
- Keywords:
-
- Accretion Disks;
- Black Holes (Astronomy);
- Gamma Ray Astronomy;
- High Energy Interactions;
- X Ray Sources;
- Adiabatic Conditions;
- Coulomb Collisions;
- Energy Conversion;
- Energy Conversion Efficiency;
- Equipartition Theorem;
- Galactic Nuclei;
- Gravitational Effects;
- Interstellar Magnetic Fields;
- Periodic Variations;
- Quasars;
- Shock Wave Interaction;
- Astrophysics;
- 97.60.Lf;
- 98.70.Qy;
- 95.30.Gv;
- Black holes;
- X-ray sources;
- X-ray bursts;
- Radiation mechanisms;
- polarization