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1991 Fiscal Year Final Research Report Summary

UK-Japan Cooperative Study of Solar Flares with the SOLAR-A Spacecraft

Research Project

Project/Area Number 01044044
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionNational Astronomical Observatory

Principal Investigator

HIRAYAMA Tadashi  Solar Physics Division, National Astronomical Observatory, 太陽物理学研究系, 教授 (20012841)

Co-Investigator(Kenkyū-buntansha) BENTLEY Robert D.  Mullard Space Science Laboratory, University College London, マラード宇宙科学研究所, 研究員
CULHANE J.L.  ロンドン大学, マラード宇宙科学研究所, 教授
OGAWARA Yoshiaki  Space Science Division, Institute of Space and Astronautical Sciences, 宇宙圏研究系, 教授 (80013671)
SAKAO Taro  Solar Physics Division, National Astronomical Observatory, 太陽物理学研究系, 助手 (00225781)
SUEMATSU Yoshinori  Solar Physics Division, National Astronomical Observatory, 太陽物理学研究系, 助手 (50171111)
TSUNETA Saku  Institute of Astronomy, University of Tokyo, 理学部, 助手 (50188603)
WATANABE Tetsuya  Solar Physics Division, National Astronomical Observatory, 太陽物理学研究系, 助教授 (60134631)
KOSUGI Takeo  Radio Astronomy Division, National Astronomical Observatory, 電波天文学研究系, 教授 (70107473)
CULHANE J. Leonard  Mullard Space Science Laboratory, University College London
Project Period (FY) 1989 – 1991
KeywordsSolar X-ray Spectra / Bragg Crystal Spectrometer / Solar Corona / Solar Flares
Research Abstract

The SOLAR-A (Yohkoh) mission was successfully launched on August 30, 1991.
The onboard scientific instruments have been in good condition and returning new data of the sun in X-ray and gamma-ray wavelengths. Bragg crystal spectrometer, developed and manufactured under the UK-Japan collaboration, revealed new aspects of coronal and flare diagnostics. A flare-like chromospheric evaporation takes place in an sub C class activity, which may have a key to understand the heating mechanism of solar corona. Hydrogen like iron spectra in small M class flares were taken for the first time with an improved spectral resolution. Totally blueshifted spectra of soft X-ray emission lines clearly indicate the evidence of chromospheric evaporation in solar flares. Element abundances in the corona are sometimes different from those in the photosphere and change according to the development of solar flares. Data analysis softwares in the workstations linked together, provide an efficient analysis system of data downlinked both at Kagoshima "Space Center and at Deep Space Network Stations, NASA.

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Y.Ogawara et al.: "The SOLARーA Mission;an Overview" Solar Physics. 136. 1-16 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Kosugi et al.: "The Hard XーRay Telescope" Solar Physics. 136. 17-36 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Tsuneta et al.: "The Soft XーRay Telescope" Solar Physics. 136. 37-68 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yoshimori et al.: "The Wide Band Spectrometer on the SOLARーA" Solar Physics. 136. 69-88 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.L.Culhane et al.: "The Bragg Crystal Spectrometer for SOLARーA" Solar Physics. 136. 89-104 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.D.Morrison et al.: "SOLARーA Reformatted Date Files and Observing Log" Solar Physics. 136. 105-110 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Uchida,R.C.Canfield T.Watanabe,and E.Hiei: "Flare Physics in Solar Activity Maximum 22" Springer Verlag, 1-360 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Z.Sveska and Y.Uchida: "The Yohkoh(SOLARーA)Mission" Kluwer Academic Publishers, 1-110 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y. Ogawara et al.: "The SOLAR-A Mission ; an Overview" Solar Physics. 136. 1-16 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kosugi et al.: "The Hard X-Ray Telescope" Solar Physics. 136. 17-36 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Tsuneta et al.: "The Soft X-Ray Telescope" Solar Physics. 136. 37-68 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Yoshimori et al.: "The Wide Band Spectrometer on the SOLAR-A" Solar Physics. 136. 69-88 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] J. L. Culhane et al.: "The Bragg Crystal Spectrometer for SOLAR-A" Solar Physics. 136. 89-104 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Uchida, R. C. Canfield, T. Watanabe, and E. Hiei: Springer Verlag. Flare Physics in Solar Activity Maximum 22, 1-360 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Z. Svestka and Y. Uchida: Kluwer Academic Publisher. The SOLAR-A (SOLAR-A) Mission, 1-110 (1991)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-16  

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