?????

1
?????CME?????Solar Flares/CMEs and Space Weather

• ??? (Ayumi Asai)1????? 1?
• ????2?????2?????2
• 1 ?????????2 ???

2
?????????The Sun as a Source
???? CME

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

3
??????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
?????????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
????????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
????????Plasmoid Ejections

• Multiple plasmoid ejections and correlation with
  HXR emissions
• (Takasaki et al. 2005?)

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7
????????Prominence Eruptions

• gravity force and magnetic pressure work
  effectively for prominence ejections
• (Morimoto Kurokawa 2003a, b)

Initial amountN
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
??????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
???????????????????????
An HXR burst occurred on the slit (0519 UT).
12
????Particle Acceleration
Masuda et al. (1994) Aschwanden et al. (1996)

• Site? Amount?
• ?Mechanism?

13
???Summary

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

14
???????Evolution of Active Region
NOAA10488
NOAA10488
NOAA10486
2003/10/28
2003/11/03
NOAA10486
2003/10/24
2003/10/25
2003/10/26
2003/10/27
2003/10/28
2003/10/29
2003/10/30
2003/10/31
2003/11/01
2003/11/02