SMuK 2021 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 5: Nuclear Astrophysics
HK 5.3: Vortrag
Montag, 30. August 2021, 17:15–17:30, H4
Long-time simulations of neutron star mergers — •Maximilian Jacobi1, Federico Guercilena1, Almudena Arcones1,2, Wolfgang Kastaun3,4, Takami Kuroda3, Bruno Giacomazzo5,6,7, and Martin Obergaulinger8 — 1Technische Universität Darmstadt — 2GSI Helmholtzzentrum für Schwerionenforschung — 3Max Planck Institute for Gravitational Physics — 4Leibniz Universität Hannover — 5Universitá degli Studi di Milano - Bicocca — 6INFN, Sezione di Milano-Bicocca — 7INAF, Osservatorio Astronomico di Brera — 8Universitat de València
Merging binary neutron stars (BNS) typically form a massive accretion disk around a compact object that can eject mass for up to several seconds. Explosive r-process nucleosynthesis in these ejecta make up a large contribution to the total mass of heavy elements produced in the event and play an important role in its optical and infrared transient (kilonova). Therefore, to interpret multi-messenger events such as GW170817, it is essential to perform long-term simulations. I will present GR simulations of BNS mergers following the in-spiral, merger, and accretion disk phases. Shortly after merger, we transition from 3D to 2D which significantly reduces the computational cost of the simulation. This setup allows us to simulate merging neutron stars consistently from the in-spiral to the accretion disk phase on the time scale of seconds.