SMuK 2021 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 5: Nuclear Astrophysics
HK 5.2: Talk
Monday, August 30, 2021, 17:00–17:15, H4
Gravitational wave signatures of the hadron-quark phase transition in binary neutron star mergers — •Matthias Hanauske1,2, Horst Stöcker1,2, and Luciano Rezzolla1,2 — 1Institut für Theoretische Physik, Max-von-Laue-Straße 1, 60438 Frankfurt, Germany — 2Frankfurt Institute for Advanced Studies, Ruth-Moufang-Straße 1, 60438 Frankfurt, Germany
The long-awaited detection of a gravitational wave from the merger of a binary neutron star in August 2017 (GW170817) marked the beginning of the new field of multi-messenger gravitational wave astronomy. Reaching densities a few times that of nuclear matter and temperatures up to 100 MeV, such mergers also represent potential sites for a phase transition from confined hadronic matter to deconfined quark matter (HQPT). The appearance of a HQPT in the interior region of the merger remnant and its conjunction with the spectral properties of the emitted gravitational wave can be calculated by fully general-relativistic hydrodynamic simulations. The results show, that binary neutron star mergers probe a broad region of the QCD phase diagram, with matter crossing the phase boundary over a large range in densities and temperatures. Depending on the properties of the HQPT, a gravitational wave signature can be created promptly after the merger or during the post-merger evolution. Especially during the postmerger evolution of the produced hypermassive/supramassive hybrid star the occurrence of a "delayed HQPT" might give a clear gravitational wave signature of the production of quark matter.