Positron annihilation radiation from X-ray binary systems

Abstract

view Abstract Citations References (35) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Positron Annihilation Radiation from X-Ray Binary Systems Wu, Mei ; Zhang, Chun-Sheng ; Li, Ti-Pei Abstract Results are presented of a detailed investigation of the electron-positron annihilation process around X-ray binary systems, typically the Cygnus X-3 system, by a Monte Carlo calculation. It is shown that there exists a narrow 511 keV annihilation line emitted from some kind of X-ray binary system, e.g., from an accreting neutron X-ray source which contains an optically thick accretion disk corona. The significance and width of radiation lines depend on the corona electron density and the size, status, and temperature distribution of the X-ray halo around the binary system. Publication: The Astrophysical Journal Pub Date: February 1993 DOI: 10.1086/172277 Bibcode: 1993ApJ...404..276W Keywords: Positron Annihilation; Stellar Radiation; X Ray Binaries; Galactic Nuclei; Gamma Ray Spectra; Milky Way Galaxy; Stellar Models; Astrophysics; GAMMA RAYS: THEORY; RADIATION MECHANISMS: MISCELLANEOUS; STARS: INDIVIDUAL CONSTELLATION NAME: CYGNUS X-3; X-RAYS: STARS full text sources ADS | data products SIMBAD (5)