Neutron Star Binary Coalescences: Angular Momentum Threshold Against a Prompt Collapse

Details Neutron Star Binary Coalescences: Angular Momentum Threshold Against a Prompt Collapse Neutron Star Binary Coalescences: Angular Momentum Threshold Against a Prompt Collapse

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..aprh10008z&link_type=abstract

American Physical Society, 2008 APS April Meeting and HEDP/HEDLA Meeting, April 11-15, 2008, abstract #H10.008

Physics

Scientific paper

We performed fully general relativistic simulations of neutron star binary coalescences to investigate how much angular momentum is needed to support the merged system against a prompt gravitational collapse. For a polytropic equation equation of state with the polytropic index in the range of γ= 2 to 1.8, we find that the angular momentum threshold for an equal mass system can be described quite accurately by a simple formula L/M2=MADM/MADM^max, where L is the total angular momentum of the binary neutron star system, M is the total ADM mass of the system, MADM is the ADM mass of the neutron star in isolation, MADM^max is the maximum ADM mass of a single neutron star with the same equation of state.

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