The 511 keV annihilation line from binaries

Details The 511 keV annihilation line from binaries The 511 keV annihilation line from binaries

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993cha%26a..17..183w&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 17, Issue 2, p. 183-186.

Astronomy and Astrophysics

Astrophysics

Accreting Binaries-X-Rays-Γ-Ray Spectrum

Scientific paper

The electron-positron annihilation process in accreting binary systems, typically Cygnus X-3, was investigated. Our Monte Carlo calculation shows that, under certain conditions such systems can emit a rather narrow annihilation line, whose flux and width depend on the intensity of the emitted γ photons, the state, size and temperature distribution of the X-ray halo, and the density and distribution of the electrons in the disk. We also discussed the possibility of observing the line by current experiments including the OSSE detector on board the GRO satellite.

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