Göttingen 2025 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 2: Relastro I

GR 2.4: Vortrag

Dienstag, 1. April 2025, 14:55–15:15, ZHG008

Can a collapsing White Dwarf power a long GRB with kilonova? — •Luis Felipe Longo Micchi — Friedrich-Schiller Universität, Jena, Deutschland

In this talk, I will present the results of axisymmetric simulations of accretion-induced collapse (AIC) of rapidly rotating, magnetized white dwarfs. Using general relativistic neutrino magnetohydrodynamics, we explore how strong magnetic fields and rotation during collapse drive the formation of relativistic jets and neutron-rich outflows. These findings offer a compelling explanation for the observed properties of long gamma-ray bursts (LGRBs) like GRB 211211A and GRB 230307A, including their associated kilonovae. I will discuss how our models reproduce the energy and duration of these LGRBs and their accompanying kilonovae without fine-tuning, highlighting AIC as a significant astrophysical site for heavy r-process element production.

Keywords: White Dwarfs; Accretion-Induced Collapse; Gamma-Ray Bursts; Relativistic Jets