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

"Energy Release, Particle Acceleration, and Magnetic Reconnection in Solar Flares"

Research Project

Project/Area Number 08304021
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionInstitute of Space and Astronautical Science (1998)
National Astronomical Observatory of Japan (1996-1997)

Principal Investigator

KOSUGI Takeo  ISAS,Planetary Science Division, professor, 惑星研究系, 教授 (70107473)

Co-Investigator(Kenkyū-buntansha) MASUDA Satoshi  Nagoya University, STE Laboratory, research associate, 太陽地球環境研究所, 助手 (10262916)
SHIBATA Kazunori  National Astronomical Observatory, Solar Physics Division, associate professor, 太陽物理学研究系, 助教授 (70144178)
SAKURAI Takashi  National Astronomical Observatory, Solar Physics Division, professor, 太陽物理学研究系, 教授 (40114491)
TSUNETA Saku  National Astronomical Observatory, Solar Physics Division, professor, 太陽物理学研究系, 教授 (50188603)
UCHIDA Yutaka  Science University of Tokyo, Faculty of Science, professor, 理学部, 教授 (90012814)
坂井 純一  富山大学, 工学部, 教授 (50019220)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,400,000 (Direct Cost: ¥7,400,000)
Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1997: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1996: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordssolar flares / CME (coronal mass ejection) / magnetic reconnection / particle accelerator / Yohkoh satellite / Nobeyama Radioheliograph / Mitaka Flare Telescope / Hida Domeless Telescope / 太陽X線放射 / 太陽電波放射
Research Abstract

This research project was proposed for unveiling the solar flare mechanism, i.e., energy release, particle acceleration, and their relation to magnetic reconnection. These have been the main objectives of the Yohkoh satellite, which was launched by ISAS in August 1991. With a large amount of data accumulated by Yohkoh in the past five years, in conjunction with ground-based observations, we have aimed to deepen our understanding on how these processes take place. The project team has been so organized as to cover almost all solar physicists in Japan. During the three-year term of this project, we have tried to improve the data archive and analysis tools, organized several mini-workshops on specific topics, and held a big symposium every year for exchanging ideas and science results.
We have achieved the following :
1. Progress in data archive and analysis tools, including drastic improvement of the Yohkoh hard X-ray telescope's image synthesis program ;
2. Organization of collaborative data analysis framework with foreign solar physics satellites such as SOHO and TRACE ;
3. Coordinate data analysis using Yohkoh and ground-based observations such as from Nobeyama Radioheliograph, Mitaka Flare Telescope, and Hida Domeless Telescope, resulting in revealing the compLex magnetic field geometry causing flare explosion ; and
4. Progress in theoretical or numerical studies, which shows that solar flares and coronal mass ejections can be understood as different aspects of magnetic reconnection taking place in the corona with slightly different conditions.
The scientific outputs from this project have been summarized in 158 journal and proceedings papers plus 66 talks (excluding those published elsewhere) in various conferences. The proceedings of the three big symposia we organized in this project were already published.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (37 results)

All Other

All Publications (37 results)

  • [Publications] Mori, K., Sakai, J. I., and Zhao, J.: "Ion Acceleration near X-Type Magnetic Reconnection Region" Astrophys.J.494. 430-437 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Somov, B.V., Kosugi, T., and Sakao, T.: "Collosionless Three-Dimensional Reconnection in Impulsive Solar Flares" Astrophys.J.497. 943-956 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tsuneta, S. and Naito, T.: "Fermi Acceleration at Fast Shock in a Solar Flare and Impulsive Loop-Top Hard X-Ray Source" Astrophys.J.Letters. 495. 67-70 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ueono, S. and Kitai, R.: "3D Velocity Field Observation of Solar Convection. I . Characteristics of Mesogranulation" Publ.Astron.Soc.Japan. 50. 129-135 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shimojo, M.,Shibata, K., and Harvey, K.L.: "Magnetic Field Properties of Solar X-ray Jets" Solar Phys.178. 379-392 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sato, J., Kosugi, T., and Makishima, K.: "Improvement of Yohkoh Hard X-ray Imaging" Publ. Astron. Soc. Japan. 51. 127-150 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tajima, T. and Shibata, K.: "Plasma Astrophysics" Addison-Wesley(Reading, Massachusetts, USA), 494 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Watanabe, T., Kosugi, T., and Sterling, A.C.(eds.): "Observational Plasma Astrophysics-Five Years of Yohkoh and Beyond" Kluwer Academic Publishers(Dordrecht, The Netherlands), 398 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Mori, K., Sakai, J.I., and Zhao, J.: ""Ion Acceleration near X-Type Magnetic Reconnection Region"" Astrophys.J.494. 430-437 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Somov, B.V., Kosugi, T., and Sakao, T.: ""Collosionless Three-Dimensional Reconnection in Impulsive Solar Flares"" Astrophys.J.497. 943-956 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tsuneta, S.and Naito, T.: ""Fermi Acceleration at Fast Shock in a Solar Flare and Impulsive Loop-Top Hard X-Ray Source"" Astrophys.J.Letters. 495. 67-70 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ueno, S.and Kitai, R.: ""3D Velocity Field Observation of Solar Convection.I.Characteristics of Mesogranulation"" Publ.Astron.Soc.Japan. 50. 129-135 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shimojo, M., Shibata, K., and Harvey, K.L.: ""Magnetic Field Properties of Solar X-Ray Jets"" Solar Phys.178. 379-392 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sato, J., Kosugi, T., and Makishima, K.: ""Improvement of Yohkoh Hard X-Ray Imaging"" Publ.Astron.Soc.Japan. 51. 127-150 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tajima, T.and Shibata, K.: "Plasma Astrophysics, ". Addison-Wesley (Reading, Massachusetts, USA), 494 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Watanabe, T., Kosugi, T., and Sterling, A.C.(eds.): "Observational Plasma Astrophysics-Five Years of Yohkoh and Beyond". Kluwer Academic Publishers (Dordrecht, The Netherlands), 398 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Mori,K.,Sakai,J.I.,and Zhao,J.: "Ion Acceleration near X-Type Magnetic Reconnection Region" Astrophys.J.494. 430-437 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Somov,B.V.,Kosugi,T.,and Sakao,T.: "Collosionless Three-Dimensional Reconnection in Impulsive Solar Flares" Astrophys.J.497. 943-956 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tsuneta,S.and Naito,T.: "Fermi Acceleration at Fast Shock in a Solar Flare and Impulsive Loop-Top Hard X-Ray Source" Astrophys.J.Letters. 495. 67-70 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ueno,S.and Kitai,R.: "3D Velocity Field Observation of Solar Convection.I.Characteristics of Mesogranulation" Publ.Astron.Soc.Japan. 50. 129-135 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Shimojo,M.,Shibata,K.,and Harvey,K.L.: "Magnetic Field Properties of Solar X-Ray Jets" Solar Phys.178. 379-392 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Sato,J.,Kosugi,T.,and Makishima,K.: "Improvement of Yohkoh Hard X-ray Imaging" Publ.Astron.Soc.Japan. 51. 127-150 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tajima,T.and Shibata,K.: "Plasma Astrophysics" Addison-Wesley (Reading,Massachusetts,USA), 494 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Watanabe,T.,Kosugi,T.,and Sterling,A.C. (eds.): "Observational Plasma Astrophysics-Five Years of Yohkoh and Beyond" Kluwer Academic Publishers (Dordrecht,The Netherlands), 398 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] S.Tsuneta, S.Masuda, 他: "Hot and Super-Hot Plasmas above an Impulsive-Flare Loop" Astrophys.J.478. 787-798 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] B.V.Somov and T.Kosugi: "Collisionless Reconnection and High-Energy Particle Acceleration in Solar Flares" Astrophys.J.485. 859-868 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.J.Aschwanden, 他: "Electron Trapping Times and Trap Densities in Solar Flare Loops Measured with Compton Gamma-Ray Observatory and Yohkoh" Astrophys.J.487. 936-955 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Hori, T.Yokoyama, 他: "Pseudo-Two-Dimensional Hydrodynamic Modeling of Solar Flare Loops" Astrophys.J.489. 426-441 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Nishio, K.Yaji, 他: "Magnetic Field Configuration in Impulsive Solar Flares Inferred from Coaligned Microwave/X-ray Images" Astrophys.J.489. 976-991 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Kosugi and K.Shibata: "Solar Coronal Dynamics and Flares as a Cause of Interplanetary Disturbances" “Magnetic Storms"(Geophysical Monograph 98,AGU). 21-34 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Watanabe, 他(編著): "Observational Plasma Astrophysics" Kluwer Academic Publ., 500 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.J.Ashwanden、小杉、他: "The Scaling Law between Electron Time-of-Flight Distances and Loop Lengths in Solar Flares" Astrophys.J.470. 1198-1217 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 小杉健郎、柴田一成: "Solar Coronal Dynamics and Flares as a Cause of Interplanetary Disturbances" "Geomagnetic Storms" (ed.B.Tsurutani et al. ; AGU). (in press). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 横山央明、柴田一成: "Magnetic Reconnection Coupled with Heat Conduction" Astrophys.J. (Letters). 474. L61-L64 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 大山政光、柴田一成: "Preflare Heating and Mass Motion in a Solar Flare Associated with a Hot Plasma Ejection -1993 November 11 C9.7 Flare-" Publ.Astron.Soc.Japan. (in press). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 坂井純一、C.de Jager: "Solar Flares and Collisions between Current-Carrying Loops -Types and Mechanisms of Solar Flares and Coronal Loop Heating-" Space Science Review. 77. 1-192 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 常田佐久: "Moving Plasmoid and Neutral Sheet Formation in a Solar Flare" Astrophys.J.(in press). (1997)

    • Related Report
      1996 Annual Research Report

URL: 

Published: 1996-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi