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THE FATE OF THE COMPACT REMNANT IN NEUTRON STAR MERGERS
Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Faculty of Science, Department of Astronomy.
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Number of Authors: 6
2015 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 812, no 1, 24Article in journal (Refereed) Published
Abstract [en]

Neutron star (binary neutron star and neutron star-black hole) mergers are believed to produce short-duration gamma-ray bursts (GRBs). They are also believed to be the dominant source of gravitational waves to be detected by the advanced LIGO and advanced VIRGO and the dominant source of the heavy r-process elements in the universe. Whether or not these mergers produce short-duration GRBs depends sensitively on the fate of the core of the remnant (whether, and how quickly, it forms a black hole). In this paper, we combine the results of Newtonian merger calculations and equation of state studies to determine the fate of the cores of neutron star mergers. Using population studies, we can determine the distribution of these fates to compare to observations. We find that black hole cores form quickly only for equations of state that predict maximum non-rotating neutron star masses below 2.3-2.4 solar masses. If quick black hole formation is essential in producing GRBs, LIGO/Virgo observed rates compared to GRB rates could be used to constrain the equation of state for dense nuclear matter.

Place, publisher, year, edition, pages
2015. Vol. 812, no 1, 24
Keyword [en]
gamma-ray burst: general, stars: neutron
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-123798DOI: 10.1088/0004-637X/812/1/24ISI: 000364234700024OAI: oai:DiVA.org:su-123798DiVA: diva2:882481
Available from: 2015-12-15 Created: 2015-12-07 Last updated: 2015-12-15Bibliographically approved

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Rosswog, Stephan
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The Oskar Klein Centre for Cosmo Particle Physics (OKC)Department of Astronomy
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