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arXiv · 1006.2839

Mergers of Magnetized Neutron Stars with Spinning Black Holes: Disruption, Accretion and Fallback

Sarvnipun Chawla·Matthew Anderson·Michael Besselman·Luis Lehner·Steven L. Liebling·Patrick M. Motl·David Neilsen
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Abstract

We investigate the merger of a neutron star (of compaction ratio $0.1$) in orbit about a spinning black hole in full general relativity with a mass ratio of $5:1$, allowing for the star to have an initial magnetization of $10^{12} {\rm Gauss}$. We present the resulting gravitational waveform and analyze the fallback accretion as the star is disrupted. The evolutions suggest no significant effects from the initial magnetization. We find that only a negligible amount of matter becomes unbound; $99%$ of the neutron star material has a fallback time of 10 seconds or shorter to reach the region of the central engine and that $99.99%$ of the star will interact with the central disk and black hole within 3 hours.

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Sarvnipun Chawla, Matthew Anderson, Michael Besselman, Luis Lehner, Steven L. Liebling, Patrick M. Motl, David Neilsen. 2010-10-05. Mergers of Magnetized Neutron Stars with Spinning Black Holes: Disruption, Accretion and Fallback. https://doi.org/10.1103/physrevlett.105.111101

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