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Central engines of gamma-ray bursts associated with kilonova emission are not fully understood. General relativistic simulations are necessary to reveal the physics involved in these systems. This talk will cover two topics: (1) Importance of advanced neutrino transport in neutron star post-mergers evolutions; In this part, I will review and compare difference neutrino transport schemes and microphysics, and present the importance of resolving better neutrino microphysics.
(2) Gamma-ray bursts and kilonova emission from magnetized accretion-induced collapse of white dwarfs. We show that with sufficiently strong magnetic fields, accretion-induced collapse of rapidly rotating white dwarfs can be sources of jets and heavy element production. Without fine-tuning, our model can naturally explain long-duration gamma-ray bursts accompanied by kilonova emissions, such as GRB 211211A and GRB 230307A.

 

Patrick is currently a Network for Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) postdoc fellow, he stations at the Los Alamos National Laboratory before a two-year visit at the University of New Hampshire. Patrick completed his Ph.D. in Physics at the Chinese University of Hong Kong in 2021 where he was supervised by Prof. Tjonnie G. F. Li. His research has been focused on general-relativistic simulation codes development, and their application to investigating neutron star astrophysics problems. Within the N3AS network, Patrick will primarily work on numerical modellings of highly magnetized neutron stars, neutron star mergers and core-collapse supernovae.