Oscillations and stability of equilibrium states of magnetized neutron stars

• Project/Area Number: 19540309
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tohoku University
• Principal Investigator: YOSHIDA Shijun Tohoku University, 大学院・理学研究科, 助教 (30386635)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: 宇宙物理 / 相対論 / 中性子星 / 回転 / 磁場 / 恒星振動

Research Abstract

トロイダル磁場と呼ばれる子午面に垂直な磁場だけを持つ相対論的な磁場星の軸対称平衡状態を求めるための定式化及び数値コードの開発を行った。また、開発した数値コードを用いて計算した磁場星の平衡状態の軸対称安定性を相対論的な磁気流体シミュレーション数値コードを用いて調べ、軸対称不安定性の発生後の最終状態を明らかにした。また、磁場を摂動として扱いトロイダル磁場が支配的な相対論的な磁場星を得るための定式化も行った。

Research Products

• [Journal Article] Equilibrium Configuratins of Relativistic Stars with Purely Toroidal Magnetic Fields: Effects of Realistic Equation of State (2009)
  • Author(s): Kenta Kiuchi, Kei Kotake & Shijun Yoshida
  • Journal Title: Astrophysical Journal Vol. 696(印刷中)
  • Peer Reviewed
• [Journal Article] Equilibrium Configurations of Relativistic Stars with Purely Toroidal Magnetic Fields : Effects of Realistic Equations of State (2009)
  • Author(s): Kenta Kiuchi, Kei Kotake, Shijun Yoshida
  • Journal Title: Astrophysical Journal 696(印刷中)
  • Peer Reviewed
• [Journal Article] Relativistic stars with purely toroidal magnetic fields (2008)
  • Author(s): Kenta Kiuchi, & Shijun Yoshida
  • Journal Title: Physical Review D Vol.78 Pages: 44045-44045
  • Peer Reviewed
• [Journal Article] Evolution of neutron stars with purely toroidal magnetic fields (2008)
  • Author(s): Kenta Kiuchi, Masaru Shibata, & Shijun Yoshida
  • Journal Title: Physical Review D Vol.78 Pages: 24029-24029
  • Peer Reviewed
• [Journal Article] Evolution of neutron stars with toroidal magnetic fields : Axisymmetric simulation in full general relativity (2008)
  • Author(s): Kenta Kiuchi, Masaru Shibata Shijun Yoshida
  • Journal Title: Physical Review D 78 Pages: 24029-24029
  • Peer Reviewed
• [Journal Article] Relativistic stars with purely toroidal magnetic fields (2008)
  • Author(s): Kenta Kiuchi, Shijun Yoshida
  • Journal Title: Physical Review D 78 Pages: 44045-44045
  • Peer Reviewed
• [Presentation] 一般相対論的磁場星の平衡形状とその性質 (2008)
  • Author(s): 木内健太
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター(東京都渋谷区)
  • Year and Date: 2008-03-27
• [Presentation] 原子中性子星のg-モード励起 (2007)
  • Author(s): 吉田至順
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 岐阜大学(岐阜県岐阜市)
  • Year and Date: 2007-09-28
• [Presentation] 原始中性子星のg-モード励起 (2007)
  • Author(s): 吉田 至順
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 岐阜大学
  • Year and Date: 2007-09-28