Computer Science – Numerical Analysis
Scientific paper
Sep 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974phdt.........8a&link_type=abstract
Ph.D. Thesis Lawrence Livermore National Lab., CA.
Computer Science
Numerical Analysis
1
Binary Stars, Deposition, Mass Transfer, Numerical Analysis, Computer Techniques, Neutron Stars, X Ray Irradiation
Scientific paper
Several aspects of mass transfer and accretion in X-ray binary systems were numerically investigated. Computer calculations were performed of (1) the X-ray emission resulting from the accretion of material onto a neutron star, (2) the X-ray heating of the surface of HZ Her, and (3) the X-ray heating of a gas stream leaving HZ her through the inner Lagrangian point, falling toward Her X-1. In the accretion calculations it was found that for high mass neutron stars, the emitted spectra differ only slightly from blackbody, particularly at lower luminosities. For intermediate mass neutron stars the spectra differ substantially from blackbody spectra, especially at higher luminosities. The calculated spectra differ greatly from blackbody spectra at all luminosities for low mass neutron stars. The attenuation and diffusion of a beam of X-rays incident on the surface of HZ Her were calculated. Atmospheric hydrogen was assumed to be in LTE. All other elements were treated non-LTE.
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