Equation of state constraints from the threshold binary mass for prompt collapse of neutron star mergers

Using hydrodynamical simulations for a large set of high-density matter equations of state (EoSs) we systematically determine the threshold mass M_thres for prompt black-hole formation in equal-mass and asymmetric neutron star (NS) mergers. We devise the so far most direct, general and accurate meth...

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Published inarXiv.org
Main Authors Bauswein, Andreas, Blacker, Sebastian, Vijayan, Vimal, Stergioulas, Nikolaos, Chatziioannou, Katerina, Clark, James A, Bastian, Niels-Uwe F, Blaschke, David B, Cierniak, Mateusz, Fischer, Tobias
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 06.10.2020
Subjects
Binary stars
Black holes
Equations of state
Gravitational collapse
Gravitational waves
Neutron stars
Phase transitions
Physics - High Energy Astrophysical Phenomena
Physics - High Energy Physics - Phenomenology
Physics - Nuclear Theory
Quarks
Star mergers
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Summary:Using hydrodynamical simulations for a large set of high-density matter equations of state (EoSs) we systematically determine the threshold mass M_thres for prompt black-hole formation in equal-mass and asymmetric neutron star (NS) mergers. We devise the so far most direct, general and accurate method to determine the unknown maximum mass of nonrotating NSs from merger observations revealing M_thres. Considering hybrid EoSs with hadron-quark phase transition, we identify a new, observable signature of quark matter in NS mergers. Furthermore, our findings have direct applications in gravitational wave searches, kilonova interpretations and multi-messenger constraints on NS properties.
ISSN:2331-8422
DOI:10.48550/arxiv.2004.00846