Interpretation of the gamma-ray bump from Cygnus X-1

Details Interpretation of the gamma-ray bump from Cygnus X-1 Interpretation of the gamma-ray bump from Cygnus X-1

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...325l..39l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 325, Feb. 15, 1988, p. L39-L42.

Astronomy and Astrophysics

Astronomy

56

Gamma Ray Spectra, Spectrum Analysis, Stellar Spectra, X Ray Binaries, X Ray Sources, Accretion Disks, Black Holes (Astronomy), High Temperature Plasmas, Spectral Energy Distribution

Scientific paper

The strong 0.5-2 MeV gamma-ray bump of Cyg X-1 recently reported by HEAO 3 observers can be interpreted self-consistently as the emission from a hot (kT of about 400 keV) pair-dominated plasma. The emission region parameters are uniquely determined by the spectral fit and observed luminosity via the pair-balance condition, suggesting that the gamma rays are produced in the inner region of the accretion flow at the expense of the normal power-law hard X-rays.

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