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
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
フレア･
CME 伝播 影響 影響 影響 影響 擾乱 Active phenomena on the solar surface (flares/CMEs) work as sources of the outbreaks.
The understandings of the generation mechanisms are important.
太陽フレア･CME Solar 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.
磁気リコネクション Magnetic Reconnection
(Carmichael 1964; Sturrock 1966; Hirayama 1974; Kopp-Pneuman 1976) still needs to be checked quantitatively and qualitatively well explains observed phenomena
phenomenologically succeeded
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
プラズモイド噴出 Plasmoid Ejections
② ⑦ ⑥ ④ ③ ① ① ② ③ ④ ⑥ ⑦ Multiple plasmoid ejections and correlation with HXR emissions
(Takasaki et al. 2005?)
プロミネンス噴出 Prominence Eruptions
pre-eruption During eruption photosphere Initial amount=N Definition of g gravity force and magnetic pressure work effectively for prominence ejections
(Morimoto & Kurokawa 2003a, b)
CMEs
Strong correlation between CMEs and prominences/plasmoids
Similar relation between CME and SXR emission
Zhang et al. (2001)
CMEs
MHD simulation
direct comparison with observation
(Shiota et al. 2005, Chen & Shibata 2001)
フレアリボン Flare Ribbons
Ha 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)
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).
粒子加速 Particle Acceleration
Masuda et al. (1994)
Aschwanden et al. (1996) Site? Amount?
Mechanism?
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.
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