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Impact of a Magnetic Field on Neutrino–Matter Interactions in Core-collapse Supernovae

Kuroda, Takami (2021)
Impact of a Magnetic Field on Neutrino–Matter Interactions in Core-collapse Supernovae.
In: The Astrophysical Journal, 906 (2)
doi: 10.3847/1538-4357/abce61
Artikel, Bibliographie

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Kurzbeschreibung (Abstract)

We explore the impact of a magnetic field on neutrino–matter interactions in core-collapse supernovae. We first derive the modified source terms for neutrino–nucleon scattering and neutrino absorption and emission processes in the moment formalism. Then, we perform full relativistic, three-dimensional, magnetorotational core-collapse supernova simulations of a star with spectral neutrino transport. Our simulations self-consistently treat the parity-violation effects of weak interaction in the presence of an external magnetic field. The result shows significant global asymmetry, mostly confined in the proto-neutron star, clearly reflecting the magnetic field structure. The asymmetric property arises from two factors: the angle between the neutrino flux and magnetic field, and the term that is parallel to the magnetic field and is also proportional to the deviation of the distribution function of neutrinos from thermal equilibrium. The typical correction value amounts to ∼1% relative to the total neutrino–matter interaction rate for the magnetic field strength of G. Although these asymmetric properties do not immediately affect the explosion dynamics, our results imply that they would be significant once the neutrinos diffuse out of the proto-neutron- star core carrying those asymmetries away. We also show that, during our simulation time of ∼370 ms after bounce, our results indicate that the correction value due to the modified inelastic scattering process dominates over that of the modified neutrino absorption and emission process.

Typ des Eintrags: Artikel
Erschienen: 2021
Autor(en): Kuroda, Takami
Art des Eintrags: Bibliographie
Titel: Impact of a Magnetic Field on Neutrino–Matter Interactions in Core-collapse Supernovae
Sprache: Englisch
Publikationsjahr: 10 Januar 2021
Ort: London
Verlag: American Astronomical Society
Titel der Zeitschrift, Zeitung oder Schriftenreihe: The Astrophysical Journal
Jahrgang/Volume einer Zeitschrift: 906
(Heft-)Nummer: 2
Kollation: 17 Seiten
DOI: 10.3847/1538-4357/abce61
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Kurzbeschreibung (Abstract):

We explore the impact of a magnetic field on neutrino–matter interactions in core-collapse supernovae. We first derive the modified source terms for neutrino–nucleon scattering and neutrino absorption and emission processes in the moment formalism. Then, we perform full relativistic, three-dimensional, magnetorotational core-collapse supernova simulations of a star with spectral neutrino transport. Our simulations self-consistently treat the parity-violation effects of weak interaction in the presence of an external magnetic field. The result shows significant global asymmetry, mostly confined in the proto-neutron star, clearly reflecting the magnetic field structure. The asymmetric property arises from two factors: the angle between the neutrino flux and magnetic field, and the term that is parallel to the magnetic field and is also proportional to the deviation of the distribution function of neutrinos from thermal equilibrium. The typical correction value amounts to ∼1% relative to the total neutrino–matter interaction rate for the magnetic field strength of G. Although these asymmetric properties do not immediately affect the explosion dynamics, our results imply that they would be significant once the neutrinos diffuse out of the proto-neutron- star core carrying those asymmetries away. We also show that, during our simulation time of ∼370 ms after bounce, our results indicate that the correction value due to the modified inelastic scattering process dominates over that of the modified neutrino absorption and emission process.

ID-Nummer: Artikel-ID: 128
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Erstveröffentlichung

Sachgruppe der Dewey Dezimalklassifikatin (DDC): 500 Naturwissenschaften und Mathematik > 520 Astronomie, Kartographie
500 Naturwissenschaften und Mathematik > 530 Physik
Fachbereich(e)/-gebiet(e): 05 Fachbereich Physik
05 Fachbereich Physik > Institut für Kernphysik
05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik
05 Fachbereich Physik > Institut für Kernphysik > Theoretische Kernphysik > Theoretische nukleare Astrophysik
Hinterlegungsdatum: 14 Okt 2024 11:48
Letzte Änderung: 14 Okt 2024 11:48
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