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HK: Fachverband Physik der Hadronen und Kerne
HK 2: Nuclear Astrophysics I
HK 2.4: Vortrag
Montag, 11. März 2024, 17:45–18:00, HBR 14: HS 4
Correlations between nuclear matter parameters and the gravitational wave frequency emitted by a neutron star merger remnant — •Mario Jakobs1,2, Andreas Bauswein1, and Gabriel Martínez-Pinedo1,2 — 1GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — 2Institut für Kernphysik, Fachbereich Physik, TU Darmstadt, Darmstadt, Germany
With upcoming detectors, we will be able to observe gravitational waves (GW) emitted even after the merging of two neutron stars. The merger remnant has a dominant oscillation frequency that depends strongly on the nuclear equation of state (EOS). Here we quantify this dependency using simulations. Once post-merger GW observation data are available, this will enable us to derive properties of the nuclear EOS that are not well constrained today. To achieve this, we develop an EOS meta model allowing us to vary a single EOS parameter without altering others simultaneously. By using a meta model, we can reproduce a range of different available EOS models in a single framework. We then explore its parameter space by conducting general relativistic hydrodynamics simulations of the merger event. In our analysis we find, for instance, a clear correlation between the dominant frequency and the slope of the nuclear symmetry energy at saturation. This work was funded by Deutsche Forschungsgemeinschaft - Project-ID 279384907 - SFB 1245 and - Project-ID 138713538 - SFB 881. Support by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme under grant agreements No. 759253 and No. 885281 is acknowledged.
Keywords: neutron star; merger; gravitational wave; equation of state; nuclear matter