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Title: Asymmetric neutrino reaction and pulsar kick in magnetized proto-neutron stars in fully relativistic framework

Abstract

We calculate neutrino scattering and absorption on the hot and dense neutron-star matter with hyperons under the strong magnetic field using a perturbative approach. We find that the absorption cross-sections show a remarkable angular dependence. Its strength is reduced in the direction parallel to the magnetic field and enhanced in the opposite direction. This asymmetric variation becomes maximally 2.2 % of entire neutrino momentum when the magnetic field is assumed as about 2 Multiplication-Sign 10{sup 17} G. Since the pulsar kick after the supernova explosion may have relationships to this asymmetry, detailed discussions about the pulsar kick and the asymmetry are presented with the comparison to the observed kick velocities in a fully relativistic approach.

Authors:
; ; ; ; ; ;  [1];  [2];  [2];  [3];  [4]
  1. College of Bioresource Sciences, Nihon University, Fujisawa 252-8510 (Japan)
  2. (Japan)
  3. (Korea, Republic of)
  4. (United States)
Publication Date:
OSTI Identifier:
22075766
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1484; Journal Issue: 1; Conference: Conference on origin of matter and evolution of galaxies 2011, Wako (Japan), 14-17 Nov 2011; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMMETRY; COMPARATIVE EVALUATIONS; CROSS SECTIONS; HYPERONS; MAGNETIC FIELDS; MAGNETISM; NEUTRINO REACTIONS; NEUTRINOS; NEUTRON STARS; NUCLEAR MATTER; PERTURBATION THEORY; PULSARS; RELATIVISTIC RANGE; SUPERNOVAE

Citation Formats

Maruyama, Tomoyuki, Kajino, Toshitaka, Yasutake, Nobutoshi, Hidaka, Jun, Cheoun, Myung-Ki, Ryu, Chung-Yeol, Mathews, Grant J., National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Research Institute for the Early Universe, University of Tokyo, Hongo 7-3-1, Tokyo 113-0033, Department of Physics, Soongsil University, Seoul, 156-743, and Center of Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556. Asymmetric neutrino reaction and pulsar kick in magnetized proto-neutron stars in fully relativistic framework. United States: N. p., 2012. Web. doi:10.1063/1.4763416.
Maruyama, Tomoyuki, Kajino, Toshitaka, Yasutake, Nobutoshi, Hidaka, Jun, Cheoun, Myung-Ki, Ryu, Chung-Yeol, Mathews, Grant J., National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Research Institute for the Early Universe, University of Tokyo, Hongo 7-3-1, Tokyo 113-0033, Department of Physics, Soongsil University, Seoul, 156-743, & Center of Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556. Asymmetric neutrino reaction and pulsar kick in magnetized proto-neutron stars in fully relativistic framework. United States. doi:10.1063/1.4763416.
Maruyama, Tomoyuki, Kajino, Toshitaka, Yasutake, Nobutoshi, Hidaka, Jun, Cheoun, Myung-Ki, Ryu, Chung-Yeol, Mathews, Grant J., National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Research Institute for the Early Universe, University of Tokyo, Hongo 7-3-1, Tokyo 113-0033, Department of Physics, Soongsil University, Seoul, 156-743, and Center of Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556. Mon . "Asymmetric neutrino reaction and pulsar kick in magnetized proto-neutron stars in fully relativistic framework". United States. doi:10.1063/1.4763416.
@article{osti_22075766,
title = {Asymmetric neutrino reaction and pulsar kick in magnetized proto-neutron stars in fully relativistic framework},
author = {Maruyama, Tomoyuki and Kajino, Toshitaka and Yasutake, Nobutoshi and Hidaka, Jun and Cheoun, Myung-Ki and Ryu, Chung-Yeol and Mathews, Grant J. and National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 and Research Institute for the Early Universe, University of Tokyo, Hongo 7-3-1, Tokyo 113-0033 and Department of Physics, Soongsil University, Seoul, 156-743 and Center of Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556},
abstractNote = {We calculate neutrino scattering and absorption on the hot and dense neutron-star matter with hyperons under the strong magnetic field using a perturbative approach. We find that the absorption cross-sections show a remarkable angular dependence. Its strength is reduced in the direction parallel to the magnetic field and enhanced in the opposite direction. This asymmetric variation becomes maximally 2.2 % of entire neutrino momentum when the magnetic field is assumed as about 2 Multiplication-Sign 10{sup 17} G. Since the pulsar kick after the supernova explosion may have relationships to this asymmetry, detailed discussions about the pulsar kick and the asymmetry are presented with the comparison to the observed kick velocities in a fully relativistic approach.},
doi = {10.1063/1.4763416},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1484,
place = {United States},
year = {2012},
month = {11}
}