solar-flare researches based on the multi-wavelength simultaneous imaging obsevations of solar radio telescopes in Japan and China
Project/Area Number |
18H01253
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 16010:Astronomy-related
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Research Institution | Nagoya University |
Principal Investigator |
Masuda Satoshi 名古屋大学, 宇宙地球環境研究所, 准教授 (10262916)
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Project Period (FY) |
2018-04-01 – 2021-03-31
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Project Status |
Completed (Fiscal Year 2022)
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Budget Amount *help |
¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2020: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
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Keywords | 太陽フレア / 粒子加速 / 電波 / 多波長観測 / 太陽 / フレア |
Outline of Final Research Achievements |
We promoted international joint research on particle acceleration phenomena of solar flares with the group of the new solar radio telescope ‘MUSER’ in China. We performed a detailed analysis of events simultaneously observed with the Nobeyama Radioheliograph (NoRH), which finished its scientific operation in March 2020, and MUSER, which was in the test observation phase. MUSER captured particle acceleration signatures above the magnetic reconnection site of a solar flare, and NoRH simultaneously observed a brightening corresponding to the acceleration below the magnetic reconnection site. These observational facts suggest that particle acceleration simultaneously takes place above and below the reconnection site. In addition, the temporal behavior in the frequency-drift characteristics of a lot of tiny radio bursts observed with MUSER indicates that the particle acceleration region was moving upward at high speed.
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Academic Significance and Societal Importance of the Research Achievements |
まず、太陽フレアの標準モデルである磁気リコネクションによるエネルギー解放モデルを想定した場合、そのエネルギー解放領域の上空と下方で同時に粒子加速が起きていることを示す重要な観測結果が得られた。フレア領域が、太陽から惑星間空間につながる磁場を含んでいた場合、高エネルギー粒子が惑星間空間に流出すると考えられ、宇宙天気研究にもつながる。また、本研究では上空の粒子加速領域が高速で上方に移動している可能性を示唆する結果を得た。これは、上空に放出されたプラズモイド周辺での粒子加速だと解釈でき、プラズマ物理学の理論計算や室内実験で説明・実証すべき課題を提起することになる。
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Report
(4 results)
Research Products
(74 results)
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[Journal Article] Possible detection of solar gamma-rays by ground-level detectors in solar flares on 2011 March 72020
Author(s)
Muraki Yasushi、Vald'es-Galicia Jose F、Gonz'alez Luis Xavier、Kamiya Kohki、Katayose Yusaku、Koga Kiyokazu、Matsumoto Haruhisa、Masuda Satoshi、Matsubara Yutaka、Nagai Yuya、Ohnishi Munehiro、Ozawa Syunsuke、Sako Takashi、Shibata Shoichi、Takita Masato、Tanaka Yasuyuki、Tsuchiya Harufumi、Watanabe Kyoko、Zhang Ji Long
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Journal Title
Publications of the Astronomical Society of Japan
Volume: 72
Issue: 2
Pages: 1-17
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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