Gießen 2024 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 10: Relativistic Astrophysics I

GR 10.2: Talk

Wednesday, March 13, 2024, 14:20–14:40, HBR 14: HS 2

Radiation-hydrodynamics simulations of kilonovae with nuclear networks — •Fabio Magistrelli — Friedrich-Schiller-Universitaet Jena, TPI

I will present a new technique to simulate the long-term evolution of the material ejected during binary neutron star mergers. For the first time, we provide radiation-hydrodynamic simulations with complete nuclear network calculations to compute in real-time the energy released by nuclear reactions and keep track of the detailed matter composition. I will then describe the results obtained by applying this pipeline to a new set of numerical relativity simulations run for hundreds of milliseconds after merger. In particular, I will discuss the features induced by different equations of states for the neutron star matter on kilonovae lightcurves and r-process nucleosynthesis yields. Finally, I will consider the effects of including extra energy in the simulation in the form of a polar jet mimicking a short gamma-ray burst.

Keywords: kilonovae; r-process; nucleosynthesis; compact bynary mergers