Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-12-08
Astronomy and Astrophysics
Astrophysics
LaTeX file using mn.sty, 11 pages (including 7 figs, 1 table), uses psbox.tex. Accepted for publication in MNRAS
Scientific paper
We calculate the disk and boundary layer luminosities for accreting rapidly rotating neutron stars with low magnetic fields in a fully general relativistic manner. Rotation increases the disk luminosity and decreases the boundary layer luminosity. A rapid rotation of the neutron star substantially modifies these quantities as compared to the static limit. For a neutron star rotating close to the centrifugal mass shed limit, the total luminosity has contribution only from the extended disk. For such maximal rotation rates, we find that much before the maximum stable gravitational mass configuration is reached, there exists a limiting central density, for which particles in the innermost stable orbit will be more tightly bound than those at the surface of the neutron star. We also calculate the angular velocity profiles of particles in Keplerian orbits around the rapidly rotating neutron star. The results are illustrated for a representative set of equation of state models of neutron star matter.
Datta Bhaskar
Thampan Arun V.
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