Transcript 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
フレア･
CME
擾乱
• Active phenomena on the
solar surface
(flares/CMEs) work as
sources of the outbreaks.
• The understandings of the
generation mechanisms
are important.
伝播
影響
影響
影響
影響
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)
• well explains
observed phenomena
• phenomenologically
succeeded
• still needs to be
checked
quantitatively
and qualitatively
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
• Multiple plasmoid ejections and
correlation with HXR emissions
(Takasaki et al. 2005?)
③ ①②③ ④ ⑥
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
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
• 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
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
• Site? Amount?
Mechanism?
Masuda et al. (1994)
Aschwanden et al. (1996)
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.
活動領域の成長
Evolution of Active Region
NOAA10488
NOAA10488
NOAA10486
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2003/11/03
NOAA10486
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