| Project/Area Number |
04044171
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Institution | National Astronomical Observatory |
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Principal Investigator |
WATANABE Tetsuya National Astronomical Observatory, Solar Physics Division, 太陽物理学研究系, 助教授 (60134631)
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| Co-Investigator(Kenkyū-buntansha) |
BENTLEY Robert D. University College London, 研究員
CULHANE J.L. University College London, 教授
NISHIKAWA Jun Communications Research Laboratory, Hiraiso Center, 通信総合研究所・平磯センター, 研究員
SAKAO Taro National Astronomical Observatory, Solar Physics Division, 太陽物理学系, 助手 (00225781)
SHIBATA Kazunari National Astronomical Observatory, Solar Physics Division, 太陽物理学系, 助教授 (70144178)
TSUNETA Saku University of Tokyo, School of Science, 理学部, 助教授 (50188603)
SAKURAI Takashi National Astronomical Observatory, Solar Physics Division, 太陽物理学研究系, 教授 (40114491)
KOSUGI Takeo National Astronomical Observatory, Radio Astronomy Division, 電波天文学研究系, 教授 (70107473)
OGAWARA Yoshiaki Institute of Space and Astronautical Sciences, Space Physics Division, 宇宙圏研究系, 教授 (80013671)
HIRAYAMA Tadashi National Astronomical Observatory, Solar Physics Division, 太陽物理学研究系, 教授 (20012841)
CULHANE J.Leonard University College London
R D Bentley ロンド大学, マラード宇宙科学研究所, 研究員
J L Culhene ロンド大学, マラード宇宙科学研究所, 教授
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥7,100,000 (Direct Cost: ¥7,100,000)
Fiscal Year 1993: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1992: ¥3,900,000 (Direct Cost: ¥3,900,000)
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| Keywords | High energy solar phenomena / solar flares / High resolution observations in soft X-ray spectroscopy / Brag crystal spectrometer / Scientific satellite / 太陽軟X線スペクトル / 太陽コロナ |
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| Research Abstract |
The Yohkoh mission was launched in 1991 for the observation of solar flares with a coordinated set of instruments in X-rays and gamma-rays. The Brag crystal spectrometer(BCS) on Yohkoh has an order of magnitude increased sensitivity with less weight and size, if it is compared to the spectrometers flown in the previous solar activity maximum. The instrument was designed and manufactured under the Anglo-Japanese cooperation. The main scientific goal of this instrument is to observe the plasma motions and the transient heating and particle acceleration of flaring plasma at the initial phases of solar flares. The scientific analyses of the Yohkoh data have been done by solar physicists of the both countries. The completely blueshifted emission line was found in the very beginnings of flares. This new discovery supports the hypothesis of chromospheric evaporation. The sulphur emission from solar active regions suggests a possibility of the microflare heating of active regions. The solar corona is very dynamic and many kinds of activity take place as the result of magnetic reconnection.
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