Göttingen 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
GR: Fachverband Gravitation und Relativitätstheorie
GR 14: Relastro III
GR 14.2: Talk
Friday, April 4, 2025, 09:20–09:40, ZHG008
56Ni production in neutrino-driven winds from long-lived binary neutron star merger remnants — •Maximilian Jacobi1, Fabio Magistrelli1, Eleonora Loffredo2, Giacomo Ricigliano3, Sebastiano Bernuzzi1, David Radice4, Almudena Arcones3,5, Albino Perego6, and Domenico Logoteta7 — 1Friedrich-Schiller-Universität Jena, Germany — 2INAF - Osservatorio Astronomico d’Abruzzo, Teramo, Italy — 3Technische Universität Darmstadt, Germany — 4The Pennsylvania State University, USA — 5GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 6Universitá di Trento, Italy — 7Università di Pisa, Italy
We investigate the nucleosynthesis and kilonova light curve based on long-term binary neutron star merger simulations incorporating a two-moment neutrino-transport scheme. The ejecta are evolved up to 100 days using axisymmetric radiation-hydrodynamics simulations coupled in-situ to a complete nuclear network. We find that the neutrino-driven wind from the post-merger remnant is proton-rich, resulting in the production of iron-group elements. We explore the consequences of the altered nucleosynthesis on the kilonova light curve and spectrum. The observation of features associated with proton-rich nucleosynthesis could serve as a smoking gun for the presence of a long-lived neutron-star remnant in future kilonova observations.
Keywords: neutron star merger; kilonova