Gamma rays from Cygnus X-1: Modeling and nonthermal pair production

Details Gamma rays from Cygnus X-1: Modeling and nonthermal pair production Gamma rays from Cygnus X-1: Modeling and nonthermal pair production

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aipc..170..326d&link_type=abstract

Presented at the Workshop on Nuclear Spectroscopy of Astrophysical Sources, Washington, D.C., 14 Dec. 1987, AIP Conference Proce

Astronomy and Astrophysics

Astrophysics

10

Beam Interactions, Cygnus Constellation, Gamma Rays, Pair Production, Thermal Emission, Models, Molecular Clouds, Monte Carlo Method, X Rays, Gamma-Ray Sources, Gamma-Ray Bursts, X-Ray Binaries

Scientific paper

The gamma-ray bump observed between 0.5 and 2 MeV in the spectrum of Cygnus X-1 can be interpreted as the thermal emissions from a hot (kT approximately 400 keV) pair-dominated cloud. We argue that the X-rays and gamma rays are produced in separate emission regions, and calculate the photon-photon pair production rate from X-ray and gamma-ray interactions in the vicinity of Cyg X-1 by employing a simplified geometry for the two emitting regions.

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