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Unified formulation for stationary polytropes with stellar winds and development of a numerical scheme to obtain their structures

Research Project

Project/Area Number 20540225
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionThe University of Tokyo

Principal Investigator

ERIGUCHI Yoshiharu  The University of Tokyo, 大学院・総合文化研究科, 教授 (80175231)

Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords磁場星 / 回転星 / 定常的星風 / MHD近似 / ポリトロープ / prolate形状 / 強toroidal磁場 / 内部定常磁場の厳密解 / 定常解 / 磁場 / 星風
Research Abstract

We have found a new formulation in which axisymmetric and stationary states of barotropic stars with magnetic fields are easily handled. This has been done by considering the integrability condition among the basic equations. This integrability condition results in the general form for the current density. By applying this formulation we have developed a numerical scheme that could be used to obtain many stationary configurations with magnetic fields which are found by this scheme for the firt time in the world. At the same time, this formulation could be applied to obtain stellar wind solutions which have not been fully analyzed yet. By using this scheme, completely new analytic solutions for triaxial configurations and prolate ellipsoidal stationary structures have also been obtained..

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (15 results)

All 2011 2010 2009

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (8 results)

  • [Journal Article] Magneto-hydrodynamics in stationary and axisymmetric spacetimes : A fully covariant approach2011

    • Author(s)
      E.Gourgoilhon, C.Markakis, K.Uryu Y.Eriguchi
    • Journal Title

      Physical Review D83

      Pages: 104007-104007

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Differentially-rotating neutron star models with a parametrized rotation profile2011

    • Author(s)
      F.Galeazzi, S-i.Yoshida, Y.Eriguchi
    • Journal Title

      Astronomy and Astrophysics (掲載決定)

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Magnetohydrodynamics in stationary and axisymmetric spacetimes : A fully covariant approach2011

    • Author(s)
      Eric Gourgoulhon
    • Journal Title

      Physical Review D

      Volume: (掲載決定)

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Differentially-rotating neutron star models with a parametrized rotation profile2011

    • Author(s)
      Filippo Galeazzi
    • Journal Title

      Astronomy and Astrophysics

      Volume: (掲載決定)

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Equilibrium states of magnetized toroid-central object systems2009

    • Author(s)
      J.Otani, R.Takahashi, Y.Eriguchi
    • Journal Title

      Monthly Notices of Royal Astronomical Society 396巻

      Pages: 2152-2166

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Equilibrium states of magnetized toroid-central compact object systems2009

    • Author(s)
      Jun Otani
    • Journal Title

      Monthly Notices of Royal astronomical Society 396

      Pages: 2152-2166

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Equilibrium states of magnetized toroid-central compact object systems2009

    • Author(s)
      Otani, Takahashi and Eriguchi
    • Journal Title

      Monthly Notices of Royal Astronomical Society 印刷中(掲載確定)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] 強磁場を伴った白色矮星の磁場構造2011

    • Author(s)
      藤澤幸太郎、吉田慎一郎、江里口良治
    • Organizer
      日本天文学会
    • Place of Presentation
      筑波大学
    • Year and Date
      2011-03-16
    • Related Report
      2010 Final Research Report
  • [Presentation] 磁場を伴う中性子星とガス円盤の系の一般相対論的な定常構造2011

    • Author(s)
      藤井亮治、藤澤幸太郎、江里口良治
    • Organizer
      日本天文学会
    • Place of Presentation
      筑波大学
    • Year and Date
      2011-03-16
    • Related Report
      2010 Final Research Report
  • [Presentation] 定常磁場星の新しい厳密解2011

    • Author(s)
      川村拓夢、谷口敬介、吉田慎一郎、江里口良治
    • Organizer
      日本天文学会
    • Place of Presentation
      筑波大学
    • Year and Date
      2011-03-16
    • Related Report
      2010 Final Research Report
  • [Presentation] 中心天体とその周囲の磁場を伴う高密度なトーラスの定常的な構造2010

    • Author(s)
      藤澤幸太郎、大谷潤、高橋労太、吉田至順、江里口良治
    • Organizer
      日本天文学会
    • Place of Presentation
      金沢大学
    • Year and Date
      2010-09-23
    • Related Report
      2010 Final Research Report
  • [Presentation] Stationary and axisymmetric magnetized equilibria of stars and winds2010

    • Author(s)
      S-i.Yoshida, K.Fujisawa, Y.Eriguchi
    • Organizer
      274IAU Symposium
    • Place of Presentation
      Naxos (Italy)
    • Year and Date
      2010-09-10
    • Related Report
      2010 Final Research Report
  • [Presentation] Stationary and axisymmetric magnetized equilibria of stars and winds2010

    • Author(s)
      S.Yoshida
    • Organizer
      IAU Symposium 274 : Advances in Plasma Astrophysics
    • Place of Presentation
      Naxos, Italy
    • Year and Date
      2010-09-10
    • Related Report
      2010 Annual Research Report
  • [Presentation] Stationary and axisymmetric configurations of compact stars with extremely strong and highly localized magnetic fields2010

    • Author(s)
      K Fujisawa, S-i Yoshida, Y Eriguchi
    • Organizer
      274IAU Symposium
    • Place of Presentation
      Naxos (Italy)
    • Year and Date
      2010-09-07
    • Related Report
      2010 Final Research Report
  • [Presentation] 超強内部磁場を伴う中性子星の構造2010

    • Author(s)
      藤澤幸太郎、吉田慎一郎、江里口良治
    • Organizer
      日本天文学会
    • Place of Presentation
      広島大学
    • Year and Date
      2010-03-26
    • Related Report
      2010 Final Research Report

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Published: 2008-04-01   Modified: 2016-04-21  

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