• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Evolution and roles of the magnetic fields in core-collapse supernovae

Research Project

Project/Area Number 26800149
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionWaseda University

Principal Investigator

Sawai Hidetomo  早稲田大学, 理工学術院, その他(招聘研究員) (70514199)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords重力崩壊型超新星 / 磁気流体シミュレーション / 磁気流体不安定 / rプロセス元素合成 / ニュートリノ / 並列計算 / 磁気回転不安定 / rプロセス元素合成 / 宇宙物理 / 磁気流体力学 / 数値シミュレーション
Outline of Final Research Achievements

We numerically studied the evolution and roles of the magnetic fields in core-collapse supernovae. As a result, we found that the so-called magnetorotational instability (MRI), a mechanism amplifying magnetic field, plays important roles in the explosion dynamics and in production of heavy elements. Core-collapse supernovae are considered to be driven by neutrino heating: neutrinos produced around the center of the star heat the matter right outside. We found that the MRI indirectly enhances the heating. It is also found that more neutrons are expelled due to the MRI, and heavy elements (heavier than iron) are produced as a consequence.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (16 results)

All 2017 2016 2015 2014

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Acknowledgement Compliant: 2 results,  Open Access: 2 results) Presentation (11 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] R-Process Nucleosynthesis in Core-Collapse Supernovae Aided by Magnetorotational Instability2017

    • Author(s)
      H. Sawai, N. Nishimura, T. Takiwaki, S. Yamada
    • Journal Title

      JPS Conference Proceedings

      Volume: 14 Pages: 020618-1

    • DOI

      10.7566/jpscp.14.020618

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Intermediate r-process in Core-collapse Supernovae Driven by the Magneto-rotational Instability2016

    • Author(s)
      N. Nishimura, H. Sawai, T. Takiwaki, S. Yamada, F.-K. Thielemann
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 836 Pages: 21-21

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] THE EVOLUTION and IMPACTS of MAGNETOROTATIONAL INSTABILITY in MAGNETIZED CORE-COLLAPSE SUPERNOVAE2016

    • Author(s)
      Hidetomo Sawai, Shoichi Yamada
    • Journal Title

      The Astrophysical Journal

      Volume: 817 Issue: 2 Pages: 153-169

    • DOI

      10.3847/0004-637x/817/2/153

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] The r-process nucleosynthesis in core-collapse supernovae with the magneto-rotational instability2015

    • Author(s)
      Nobuya Nishimura, Hidetomo Sawai, Tomoya Takiwaki, Shoichi Yamada
    • Journal Title

      Proceedings of Science

      Volume: PoS ( NIC XIII ) Pages: 128-128

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The r-process nucleosynthesis in core-collapse supernovae with the magneto-rotational instability2014

    • Author(s)
      Nobuya Nishimura, Hidetomo Sawai, Takiwaki Tomoya, Shoichi Yamada
    • Journal Title

      Proceedings of Science

      Volume: Pos(NIC XIII)128 Pages: 1-6

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] Magnetohydrodynamic Simualtions to reveal Supernovae Explosion Mechanism2017

    • Author(s)
      Hidetomo Sawai
    • Organizer
      SCF2017
    • Place of Presentation
      Biopolis, Singapore
    • Year and Date
      2017-03-14
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetically assisted explosions of weakly magnetized stars2017

    • Author(s)
      Hidetomo Sawai
    • Organizer
      SN 1987A, 30 years later; Cosmic Rays and Nuclei from Supernovae and their aftermaths, IAU Symposium 331
    • Place of Presentation
      Saint-Gilles-les-Bains, La Reunion Island, France
    • Year and Date
      2017-02-20
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 重力崩壊型超新星の高解像度磁気流体シミュレーション2016

    • Author(s)
      澤井秀朋
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      愛媛大学
    • Year and Date
      2016-09-16
    • Related Report
      2016 Annual Research Report
  • [Presentation] Core-Collapse Supernovae Assisted by Magnetorotational Instabilit2016

    • Author(s)
      Hidetomo Sawai
    • Organizer
      2nd NAOJ-ECT* Workshop MRACCS2016
    • Place of Presentation
      国立天文台
    • Year and Date
      2016-06-29
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Impacts of magnetorotational instability on core-collapse supernovae2015

    • Author(s)
      澤井秀朋
    • Organizer
      F.O.E. Fifty-One Erg an international workshop on the physics and observations of supernovae and supernova remnants
    • Place of Presentation
      ノースカロライナ州立大学
    • Year and Date
      2015-06-01
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 弱磁場高速回転星の重力崩壊:磁気回転不安定に助けられるニュートリノ加熱爆発2015

    • Author(s)
      澤井秀朋
    • Organizer
      「大質量星の進化・活動現象と星の回転」研究会
    • Place of Presentation
      北海道大学
    • Year and Date
      2015-02-18
    • Related Report
      2014 Research-status Report
  • [Presentation] 超新星における磁気回転不安定のシミュレーション2015

    • Author(s)
      澤井秀朋
    • Organizer
      国立天文台天文シミュレーションプロジェクト平成26年度ユーザーズミーティング
    • Place of Presentation
      国立天文台
    • Year and Date
      2015-01-20
    • Related Report
      2014 Research-status Report
  • [Presentation] 弱磁場星の超新星爆発シミュレーション2014

    • Author(s)
      澤井秀朋
    • Organizer
      第27回理論懇シンポジウム
    • Place of Presentation
      国立天文台
    • Year and Date
      2014-12-24 – 2014-12-26
    • Related Report
      2014 Research-status Report
  • [Presentation] 弱磁場星の重力崩壊 ~マグネター磁場の由来と超新星のダイナミクス~2014

    • Author(s)
      澤井秀朋
    • Organizer
      第2回DTAシンポジウム「コンパクト天体の活動性と磁気的性質」
    • Place of Presentation
      国立天文台
    • Year and Date
      2014-10-28
    • Related Report
      2014 Research-status Report
  • [Presentation] 磁気回転不安定増幅磁場に助けられるニュートリノ加熱爆発2014

    • Author(s)
      澤井秀朋
    • Organizer
      日本天文学会2014年秋季年会
    • Place of Presentation
      山形大学
    • Year and Date
      2014-09-11
    • Related Report
      2014 Research-status Report
  • [Presentation] 磁気回転不安定に助けられるニュートリノ加熱爆発2014

    • Author(s)
      澤井秀朋
    • Organizer
      超新星・ガンマ線バースト研究会
    • Place of Presentation
      理化学研究所
    • Year and Date
      2014-08-25
    • Related Report
      2014 Research-status Report

URL: 

Published: 2014-04-04   Modified: 2018-03-22  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi