Gamma-ray bursts and kilonova emission from magnetized accretion-induced collapse of white dwarfs

ORAL

Abstract

The nature of the central engine driving long-duration gamma-ray bursts accompanied by kilonova emissions, such as GRB 211211A and GRB 230307A, remains uncertain.

We demonstrate that the accretion-induced collapse of a strongly magnetized, rapidly rotating white dwarf can power gamma-ray bursts and kilonova emissions resembling those from neutron star mergers.

In particular, we present second-long axisymmetric, general relativistic neutrino magnetohydrodynamics simulations of such collapse, exploring four different initial magnetic field strengths.

We estimate the jet energy, analyze the properties of the matter outflow, and compute the associated light curves.

Our findings highlight the crucial role of magnetic fields in shaping the ejecta mass, its composition, and the formation of jets.

With sufficiently strong magnetic fields, the accretion-induced collapse of rapidly rotating white dwarfs may produce relativistic jets and be sites of heavy element nucleosynthesis.

*P.C.-K.C. and T.P. acknowledge support from NSF Grant PHY-2020275 (Network for Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS)).LFLM acknowledges funding from the EU Horizon under ERC Consolidator Grant, no.~InspiReM-101043372.DR acknowledges support from the U.S.~Department of Energy, Office of Science, Division of Nuclear Physics under Award Number(s) DE-SC0021177 and DE-SC0024388, and from the National Science Foundation under Grants No.~PHY-2011725, AST-2108467, PHY-2116686, and PHY-2407681.The simulations in this work have been performed on the Expanse cluster at San Diego Supercomputer Centre through allocation PHY230104 and PHY230129 from the Advanced Cyberinfrastructure Coordination Ecosystem: Services \& Support (ACCESS) program, which is supported by National Science Foundation grants #2138259, #2138286, #2138307, #2137603, and #2138296.National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S.~Department of Energy under Contract No.~DE-AC02-05CH11231.

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Publication: https://arxiv.org/abs/2410.10938

Presenters

  • Patrick Chi-Kit Cheong

    • University of California, Berkeley

Authors

  • Patrick Chi-Kit Cheong

    • University of California, Berkeley

  • Tetyana PITIK

    • UC Berkeley

  • Luís Felipe LONGO MICCHI

    • Friedrich Schiller University Jena

  • David Radice

    • Pennsylvania State University