Creation of a dense torus in the coalescence of a black hole with a neutron star

1999/01/21 by Wlodzimierz Kluzniak, William H. Lee, Kluzniak, Wlodzimierz +1
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9901305

To appear in the Proceedings of the 3rd INTEGRAL workshop, Taormina, Italy, 1998

arxiv created 1999/01/21 · arxiv updated 2009/12/01

Abstract

We used a newtonian SPH (smooth-particle hydrodynamics) code to follow the final stages of evolution of a coalescing binary system of a neutron star and a black hole. We find that the outcome of the "merger" is very sensitive to the equation of state describing the neutron star. A neutron star with a soft equation of state (polytrope with index Gamma=5/3) is completely disrupted, and a fairly large and long-lived accretion torus is formed.

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