North-South Neutrino Heating Asymmetry
We perform a series of two-dimensional magnetohydrodynamic simulations of supernova cores. Since the distributions of the angular momentum and the magnetic fields of strongly magnetized stars are quite uncertain, we systematically change the combinations of the strength of the angular momentum, the...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.257.2803 2023-05-15T17:39:44+02:00 North-South Neutrino Heating Asymmetry Kei Kotake Shoichi Yamada Katsuhiko Sato The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.2803 http://arxiv.org/pdf/astro-ph/0409244v1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.2803 http://arxiv.org/pdf/astro-ph/0409244v1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/astro-ph/0409244v1.pdf Subject headings supernovae collapse rotation—magnetars pulsars magnetic text ftciteseerx 2016-01-07T19:59:51Z We perform a series of two-dimensional magnetohydrodynamic simulations of supernova cores. Since the distributions of the angular momentum and the magnetic fields of strongly magnetized stars are quite uncertain, we systematically change the combinations of the strength of the angular momentum, the rotations law, the degree of differential rotation, and the profiles of the magnetic fields to construct the initial conditions. By so doing, we estimate how the rotationinduced anisotropic neutrino heating are affected by the strong magnetic fields through parity-violating effects and first investigate how the north-south asymmetry of the neutrino heating in a strongly magnetized supernova core could be. As for the microphysics, we employ a realistic equation of state based on the relativistic mean field theory and take into account electron captures and the neutrino transport via the neutrino leakage scheme. With these computations, we find that the parity-violating corrections reduce � 0.5 % of the neutrino heating rate than that without the magnetic fields in the vicinity of the north pole of a star, on the other hand, enhance about � 0.5 % in the vicinity of the south pole. If the global asymmetry of the neutrino heating in the both of the poles develops in the later phases, the newly born neutron star might be kicked toward the north pole in the subsequent time. Text North Pole South pole Unknown North Pole South Pole |
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English |
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Subject headings supernovae collapse rotation—magnetars pulsars magnetic |
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Subject headings supernovae collapse rotation—magnetars pulsars magnetic Kei Kotake Shoichi Yamada Katsuhiko Sato North-South Neutrino Heating Asymmetry |
topic_facet |
Subject headings supernovae collapse rotation—magnetars pulsars magnetic |
description |
We perform a series of two-dimensional magnetohydrodynamic simulations of supernova cores. Since the distributions of the angular momentum and the magnetic fields of strongly magnetized stars are quite uncertain, we systematically change the combinations of the strength of the angular momentum, the rotations law, the degree of differential rotation, and the profiles of the magnetic fields to construct the initial conditions. By so doing, we estimate how the rotationinduced anisotropic neutrino heating are affected by the strong magnetic fields through parity-violating effects and first investigate how the north-south asymmetry of the neutrino heating in a strongly magnetized supernova core could be. As for the microphysics, we employ a realistic equation of state based on the relativistic mean field theory and take into account electron captures and the neutrino transport via the neutrino leakage scheme. With these computations, we find that the parity-violating corrections reduce � 0.5 % of the neutrino heating rate than that without the magnetic fields in the vicinity of the north pole of a star, on the other hand, enhance about � 0.5 % in the vicinity of the south pole. If the global asymmetry of the neutrino heating in the both of the poles develops in the later phases, the newly born neutron star might be kicked toward the north pole in the subsequent time. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Kei Kotake Shoichi Yamada Katsuhiko Sato |
author_facet |
Kei Kotake Shoichi Yamada Katsuhiko Sato |
author_sort |
Kei Kotake |
title |
North-South Neutrino Heating Asymmetry |
title_short |
North-South Neutrino Heating Asymmetry |
title_full |
North-South Neutrino Heating Asymmetry |
title_fullStr |
North-South Neutrino Heating Asymmetry |
title_full_unstemmed |
North-South Neutrino Heating Asymmetry |
title_sort |
north-south neutrino heating asymmetry |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.2803 http://arxiv.org/pdf/astro-ph/0409244v1.pdf |
geographic |
North Pole South Pole |
geographic_facet |
North Pole South Pole |
genre |
North Pole South pole |
genre_facet |
North Pole South pole |
op_source |
http://arxiv.org/pdf/astro-ph/0409244v1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.2803 http://arxiv.org/pdf/astro-ph/0409244v1.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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