On the origin of soft gamma-rays from CYG X-1

Details On the origin of soft gamma-rays from CYG X-1 On the origin of soft gamma-rays from CYG X-1

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.115...31a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 115, no. 1, Oct. 1985, p. 31-37.

Astronomy and Astrophysics

Astronomy

16

Black Holes (Astronomy), Gamma Ray Astronomy, X Ray Binaries, Accretion Disks, Compton Effect, Cygnus Constellation, Electron Photon Cascades, Relativistic Particles

Scientific paper

A hypothesis is suggested that the observed excess at energies of at least 300 keV in the spectrum of Cyg X-1 has a nonthermal origin and is associated with the development of a relativistic electromagnetic cascade, initiated by accelerated particles in the accretion plasma surrounding a black hole. The acceleration is considered to be possible for various gravitational (Penrose pair production in the ergosphere of a Kerr black hole) and electromagnetic processes in accretion plasma under turbulent or shock-wave conditions. Data from HEAO-1, Toulouse, and MPI are considered.

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