Hot accretion disks and. gamma. -ray cosmic sources
Conference
·
· AIP Conf. Proc.; (United States)
OSTI ID:6095283
Hot accretion disks around rotating black holes produce copious amounts of X-rays, ..gamma..-rays and e/sup +/e/sup -/ pairs. These Comptonized models with an energy flux spectral index of the X-ray spectrum approx. 1 are optically thick to ..gamma gamma.. pair production. The resultant high energy spectrum steepens above a few MeV. The few ..gamma..-ray spectra of active galactic nuclei that are available show this steepening as well as the ..gamma..-ray diffuse background. The same processes that take place in a hot accretion disk around a supermassive black hole at the center of an active nucleus also operate in a hot accretion disk around a stellar mass black hole. The implications for the two galactic sources Cygnus X-1 and particularly the positron source at the galactic nucleus are examined. 19 references, 2 figures.
- Research Organization:
- George Mason Univ., Fairfax, VA
- OSTI ID:
- 6095283
- Report Number(s):
- CONF-830136-
- Conference Information:
- Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 101
- Country of Publication:
- United States
- Language:
- English
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Conference
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·
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Related Subjects
640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCRETION DISKS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BLACK HOLES
COSMIC GAMMA SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY SPECTRA
FERMIONS
GALAXY NUCLEI
GAMMA RADIATION
GAMMA SPECTRA
INTERACTIONS
IONIZING RADIATIONS
LEPTONS
PAIR PRODUCTION
POSITRONS
RADIATIONS
SPECTRA
X RADIATION
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCRETION DISKS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BLACK HOLES
COSMIC GAMMA SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY SPECTRA
FERMIONS
GALAXY NUCLEI
GAMMA RADIATION
GAMMA SPECTRA
INTERACTIONS
IONIZING RADIATIONS
LEPTONS
PAIR PRODUCTION
POSITRONS
RADIATIONS
SPECTRA
X RADIATION