Prompt Merger Collapse and the Maximum Mass of Neutron Stars
Abstract
We perform hydrodynamical simulations of neutronstar mergers for a large sample of temperaturedependent nuclear equations of state and determine the threshold mass above which the merger remnant promptly collapses to form a black hole. We find that, depending on the equation of state, the threshold mass is larger than the maximum mass of a nonrotating star in isolation by between 30 and 70 percent. Our simulations also show that the ratio between the threshold mass and maximum mass is tightly correlated with the compactness of the nonrotating maximummass configuration. We speculate on how this relation can be used to derive constraints on neutronstar properties from future observations.
 Publication:

Physical Review Letters
 Pub Date:
 September 2013
 DOI:
 10.1103/PhysRevLett.111.131101
 arXiv:
 arXiv:1307.5191
 Bibcode:
 2013PhRvL.111m1101B
 Keywords:

 04.30.Tv;
 04.40.Dg;
 26.60.Kp;
 97.60.Jd;
 Gravitationalwave astrophysics;
 Relativistic stars: structure stability and oscillations;
 Equations of state of neutronstar matter;
 Neutron stars;
 Astrophysics  Solar and Stellar Astrophysics;
 General Relativity and Quantum Cosmology;
 Nuclear Theory
 EPrint:
 6 pages, 3 figures, accepted for publication in Phys. Rev. Lett