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太陽フレア・ CME と宇宙天気 Solar Flares/CMEs and Space Weather

太陽フレア・ CME と宇宙天気 Solar Flares/CMEs and Space Weather. 浅井歩 (Ayumi Asai) 1 、 下条圭美 1 、 石井貴子 2 、黒河宏企 2 、柴田一成 2 1: 国立天文台野辺山、 2: 京大理. 発生源としての太陽 The Sun as a Source. 擾乱. 伝播. 影響. 影響. 影響. 影響. フレア･ CME. Active phenomena on the solar surface (flares/CMEs) work as sources of the outbreaks .

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太陽フレア・ CME と宇宙天気 Solar Flares/CMEs and Space Weather

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  1. 太陽フレア・CMEと宇宙天気Solar Flares/CMEs and Space Weather 浅井歩 (Ayumi Asai)1、下条圭美 1、 石井貴子2、黒河宏企2、柴田一成2 1: 国立天文台野辺山、2: 京大理

  2. 発生源としての太陽The Sun as a Source 擾乱 伝播 影響 影響 影響 影響 フレア･ CME • Active phenomena on the solar surface (flares/CMEs) work as sources of the outbreaks. • The understandings of the generation mechanisms are important.

  3. 太陽フレア･CMESolar Flare / CME All of these are physically the same phenomena. They are different from each other on one point that they are observed in different aspects.

  4. 磁気リコネクションMagnetic Reconnection (Carmichael 1964; Sturrock 1966; Hirayama 1974; Kopp-Pneuman 1976) • well explains observed phenomena • phenomenologically succeeded • still needs to be checked quantitatively and qualitatively

  5. プラズモイド噴出Plasmoid Ejections • The combination of SXR ejections and HXR bursts has been observed (e.g. Ohyama & Shibata 1997) • Plasmoids play an important role in the reconnection process

  6. プラズモイド噴出Plasmoid Ejections • Multiple plasmoid ejections and correlation with HXR emissions (Takasaki et al. 2005?) ③ ① ② ③ ④ ⑥ ⑦ ② ① ④ ⑥ ⑦

  7. プロミネンス噴出Prominence Eruptions During eruption • gravity force and magnetic pressure work effectively for prominence ejections (Morimoto & Kurokawa 2003a, b) Initial amount=N pre-eruption photosphere Definition of g

  8. CMEs • Strong correlation between CMEs and prominences/plasmoids • Similar relation between CME and SXR emission Zhang et al. (2001)

  9. CMEs • MHD simulation direct comparison with observation (Shiota et al. 2005, Chen & Shibata 2001)

  10. フレアリボンFlare Ribbons • The evolution of flare ribbons implies successive reconnection also implies of the strength of the energy release (e.g. Asai et al. 2004) Ha flare ribbons

  11. リコネクションレートとポインティングフラックスリコネクションレートとポインティングフラックス An HXR burst occurred on the slit (05:19 UT).

  12. 粒子加速Particle Acceleration • Site? Amount? Mechanism? Masuda et al. (1994) Aschwanden et al. (1996)

  13. まとめSummary • Active phenomena on the solar surface (flares/CMEs) work as sources of the outbreaks. • The understandings of the generation mechanisms are important.

  14. 活動領域の成長Evolution of Active Region NOAA10488 NOAA10488 NOAA10486 2003/10/28 NOAA10486 2003/11/03 2003/10/30 2003/11/02 2003/10/24 2003/10/25 2003/10/26 2003/10/27 2003/10/28 2003/10/29 2003/10/31 2003/11/01

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