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

Copernicus Astronomical Center); Instituto de Astronomia-UNAM); William H. Lee (University of Wisconsin-Madison; Wlodzimierz Kluzniak (University of Wisconsin-Madison

arxiv: astro-ph/9901305 · v1 · submitted 1999-01-21 · 🌌 astro-ph

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

Wlodzimierz Kluzniak (University of Wisconsin-Madison , Copernicus Astronomical Center) , William H. Lee (University of Wisconsin-Madison , Instituto de Astronomia-UNAM) This is my paper

classification 🌌 astro-ph

keywords neutronstarblackequationholestatetorusaccretion

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

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