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Magnetorotational core-collapse supernovae: the impact of the magnetic field’s structure

Published online by Cambridge University Press:  27 February 2023

Matteo Bugli Open the ORCID record for Matteo Bugli [Opens in a new window] ,
Jérôme Guilet  and
Martin Obergaulinger
Matteo Bugli
Affiliation:
Laboratoire AIM, CEA/DRF-CNRS-Université Paris Diderot, IRFU/Département d’Astrophysique, CEA-Saclay, F-91191, Gif-sur-Yvette, France email: [email protected]
Jérôme Guilet
Affiliation:
Laboratoire AIM, CEA/DRF-CNRS-Université Paris Diderot, IRFU/Département d’Astrophysique, CEA-Saclay, F-91191, Gif-sur-Yvette, France email: [email protected]
Martin Obergaulinger
Affiliation:
Departament d’Astronomia i Astrofísica, Universitat de València, Dr. Moliner 50, 46100, Burjassot, Spain email: [email protected]
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Abstract

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The combination of strong magnetic fields and fast rotation is often invoked as a characteristic of the central engine for outstanding sources such as GRBs, hypernovae, and superluminous supernovae. However, the actual properties of the magnetic field during the collapse of the stellar progenitor are very uncertain, since they depend on the evolution of the star and can be affected by complex dynamo processes occurring in the central proto-neutron star. Using 3D relativistic MHD models we show that higher-order multipolar fields can lead to the onset of a supernova, although they tend to produce less energetic explosions and less collimated outflows. Quadrupolar fields efficiently extract angular momentum from the central core, but the rotational energy is partly stored in the equatorial regions, rather than powering up the polar outflows. Finally, our results show a strong magnetic quenching of the hydrodynamic non-axisymmetric instabilities that are associated to the emission of GWs.

Keywords

supernovae: generalstars: neutronmagnetohydrodynamicsMHDshock wavesinstabilitiesgravitational waves
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S363: Neutron Star Astrophysics at the Crossroads: Magnetars and the Multimessenger Revolution , June 2020 , pp. 309 - 313
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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