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PhysRevD.104.063026.pdf | 14.7 MB | Adobe PDF | 見る/開く |
タイトル: | Long-term evolution of neutron-star merger remnants in general relativistic resistive magnetohydrodynamics with a mean-field dynamo term |
著者: | Shibata, Masaru https://orcid.org/0000-0002-4979-5671 (unconfirmed) Fujibayashi, Sho Sekiguchi, Yuichiro |
著者名の別形: | 柴田, 大 関口, 雄一郎 |
キーワード: | Transient & explosive astronomical phenomena Accretion disk & black-hole plasma Neutron stars & pulsars Numerical relativity Gravitation, Cosmology & Astrophysics |
発行日: | Sep-2021 |
出版者: | American Physical Society (APS) |
誌名: | Physical Review D |
巻: | 104 |
号: | 6 |
論文番号: | 063026 |
抄録: | Long-term neutrino-radiation resistive-magnetohydrodynamics simulations in full general relativity are performed for a system composed of a massive neutron star and a torus formed as a remnant of binary neutron-star mergers. The simulation is performed in axial symmetry incorporating a mean-field dynamo term for a hypothetical amplification of the magnetic-field strength. We first calibrate the mean-field dynamo parameters by comparing the results for the evolution of black hole–disk systems with viscous hydrodynamics results. We then perform simulations for the system of a remnant massive neutron star and a torus. As in the viscous hydrodynamics case, the mass ejection occurs primarily from the torus surrounding the massive neutron star. The total ejecta mass and electron fraction in the new simulation are similar to those in the viscous hydrodynamics case. However, the velocity of the ejecta can be significantly enhanced by magnetohydrodynamics effects caused by global magnetic fields. |
著作権等: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society. |
URI: | http://hdl.handle.net/2433/274809 |
DOI(出版社版): | 10.1103/PhysRevD.104.063026 |
出現コレクション: | 学術雑誌掲載論文等 |
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