Heidelberg 2022 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 1: Astrophysics
EP 1.4: Vortrag
Montag, 21. März 2022, 15:00–15:15, EP-H1
Kilonovae, gamma-ray bursts, and heavy elements from neutron star mergers — •Oliver Just1, Andreas Bauswein1, Thomas Janka2, Stephane Goriely3, Ina Kullmann3, Shigehiro Nagataki4, Hirotaka Ito4, and Christine Collins1 — 1GSI, Darmstadt, Germany — 2MPA, Garching, Germany — 3ULB, Brussels, Belgium — 4RIKEN, Tokyo, Japan
The collision of two neutron stars, which was first observed in 2017, is one of the most luminous astrophysical explosions, in which not only electromagnetic radiation from radio to gamma-ray frequencies is emitted, but also huge amounts of energy in the form of neutrinos and gravitational waves. In order to decipher these multi-messenger events, e.g. for inferring the mass and composition of the material thrown out in the course of such a merger, one needs to build detailed theoretical models of the processes that lead to matter ejection and the emission of radiation. In this talk I will present our recent efforts to model the merger and its remnant using multi-dimensional hydrodynamics simulations including the transport of neutrinos. Moreover, I will outline how these simulations were used to predict the optical/near infrared signal, called kilonova, the flash of gamma-radiation, called short gamma-ray burst, as well as the amount of heavy elements, such as Gold, produced in the ejecta by means of the rapid neutron-capture (or r-) nucleosynthesis process.