Gamma-ray emission of Cygnus X-1

Conference · Sun Sep 25 04:00:00 EDT 1988 · AIP Conf. Proc.; (United States)

OSTI ID:7068440

Ling, J C

Observations of gamma-ray emission in the 0.4--6 MeV region from Cygnus X-1 have been reported by several groups during the last decade. The 1979 HEAO 3 observation of a broad variable feature at approx.1 MeV has been interpreted as strong evidence for Wien and annihilation radiation produced in a hot (400 keV), pair dominated spherical cloud (rapprox.250 km) in the innermost region of the accretion disk surrounding a black hole. The temporal and spectral behavior of the 0.05--10 MeV intensity observed by HEAO 3 during its approx.170 days exposure to the source suggested a more complex emission mechanism than that envisaged in the earlier bimodal accretion model. In this paper, I review the HEAO 3 results and summarize other gamma-ray observations in the 0.05--10 MeV range.

• Research Organization: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109
• OSTI ID: 7068440
• Report Number(s): CONF-871245-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 170:1
• Country of Publication: United States
• Language: English

Related Subjects

640101 -- Astrophysics & Cosmology-- Cosmic Radiation
640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASTRONOMY
BINARY STARS
BLACK HOLES
COSMIC GAMMA SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
GAMMA ASTRONOMY
GAMMA SPECTRA
GIANT STARS
INFORMATION
MATHEMATICAL MODELS
NUMERICAL DATA
SPECTRA
STAR ACCRETION
STAR EVOLUTION
STAR MODELS
STARS
SUPERGIANT STARS