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

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

1999-01-21

arxiv.org/abs/astro-ph/9901305v1

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

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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