Göttingen 2025 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 14: Relastro III

GR 14.3: Vortrag

Freitag, 4. April 2025, 09:40–10:00, ZHG008

Simulations of BNSM ejecta with online nuclear calculations and atomic opacities — •Fabio Magistrelli — TPI, FSU Jena

Understanding the details of r-process nucleosynthesis in binary neutron star mergers (BNSM) ejecta is key to interpreting kilonova observations and identifying the role of BNSM in the origin of heavy elements. I will present predictions for light curves and composition results obtained from ray-by-ray radiation-hydrodynamic simulations of BNSM ejecta (extracted from hundreds-of-ms long ab-initio numerical relativity simulations) with an online nuclear network. The ejcta evolution includes charged particles and gamma-rays thermalization, and composition-dependent opacities obtained from atomic calculations. Comparing the results with other initialization procedures and opacity models, I will discuss the correspondent systematic uncertainties on the final predictions for kilonova light curves and element production.

Keywords: BNSM ejecta; Nucleosynthesis; r-process; Kilonova