Accreting Neutron Star as a Source of X-Ray Transients, Cosmic radiation, and Gamma Ray Line Spectrum

Details Accreting Neutron Star as a Source of X-Ray Transients, Cosmic radiation, and Gamma Ray Line Spectrum Accreting Neutron Star as a Source of X-Ray Transients, Cosmic radiation, and Gamma Ray Line Spectrum

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....4...76b&link_type=abstract

Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o

Physics

Scientific paper

In a close binary system ,when the secondary companion fills up the Roche-lobe ,mass acccretion is there onto the compact primary neutron star (ns). The accreted matters contains H,He and less fraction of heavy particles (C,O,Ne,Mg). When the accretion rate is quite high [ = 10,10 Msun / year],temperature (T) and density( )of the (ns) surface increases about T = 108 K, = 106 g cm,3 leading to thermonuclear flash .Using the most recent nuclear reaction rates and new beta -decay rates proton capturing cyclic reactions have been studied under these conditions and examined about the generation of transient X-ray burst. Abundances of the nuclei(Z=6-13) have been calculated and compared with the recently observed cosmic ray source composition . Moreover , study of a gamma -ray line spectrum radiated by the excited product nuclei can give us clue to some of the recently observed Gamma -lines and their origin.

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