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Title: THE FATE OF THE COMPACT REMNANT IN NEUTRON STAR MERGERS

Journal Article · · Astrophysical Journal
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Department of Physics, The University of Arizona, Tucson, AZ 85721 (United States)
  2. Astronomical Observatory, University of Warsaw, Al Ujazdowskie 4, 00-478 Warsaw (Poland)
  3. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)
  4. The Oskar klein Center, Department of Astronomy, AlbaNova, Stockholm University, SE-106 91 Stockholm (Sweden)
  5. Institute for Nuclear Theory, University of Washington, Seattle, WA 98195 (United States)
  6. Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 (United States)

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.

OSTI ID:
22518864
Journal Information:
Astrophysical Journal, Vol. 812, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
Country of Publication:
United States
Language:
English

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Questions Related to the Equation of State of High-Density Matter journal April 2019
Compact Binary Merger Rates: Comparison with LIGO/Virgo Upper Limits text January 2015
On the rate and on the gravitational wave emission of short and long GRBs text January 2016
Bounds on the speed of sound in dense matter, and neutron star structure text January 2016
The Properties of Short gamma-ray burst Jets Triggered by neutron star mergers text January 2016
Semi-analytic derivation of the threshold mass for prompt collapse in binary neutron star mergers text January 2017
Impact of ejecta morphology and composition on the electromagnetic signatures of neutron star mergers text January 2017
Evidence for a maximum mass cut-off in the neutron star mass distribution and constraints on the equation of state text January 2017
Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817 text January 2017
Neutron-star radius constraints from GW170817 and future detections text January 2017
GW170817 and the prospect of forming supramassive remnants in neutron star mergers text January 2017
Nuclear Equation of state for Compact Stars and Supernovae text January 2018
The Multi-Messenger Matrix: the Future of Neutron Star Merger Constraints on the Nuclear Equation of State text January 2019
Relation between gravitational mass and baryonic mass for non-rotating and rapidly rotating neutron stars preprint January 2019