Elmau III, March 16, 2004 Coronal mass ejections A critical view of interpretations H.S. Hudson (UC Berkeley)

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Presentation transcript:

Elmau III, March 16, 2004 Coronal mass ejections A critical view of interpretations H.S. Hudson (UC Berkeley)

Elmau III, March 16, 2004 Background information

Elmau III, March 16, 2004 G. A. Gary, Solar Phys. 203, 71 (2001)

Elmau III, March 16, 2004 Historical observations

Elmau III, March 16, 2004 Original “ICME” (from Chapman & Bartels)

Elmau III, March 16, 2004 Tempel’s sketch of 18 July 1860 (from Eddy, 1974)

Elmau III, March 16, 2004 Context information

Elmau III, March 16, 2004 Hudson & Cliver, JGR 26, 25,199 (2001)

Elmau III, March 16, 2004 Recent discoveries

Elmau III, March 16, 2004 Sheeley et al., 1999

Elmau III, March 16, 2004 Vourlidas et al., 2003

Elmau III, March 16, 2004 Trans-equatorial X-ray interconnecting loops

Elmau III, March 16, 2004 CME association of TIL disappearances May 6, 1998 eventNear-homologous sequence (3 events) Khan & Hudson, GRL 27, 1083 (2000)

Elmau III, March 16, 2004 Pohjolainen et al., 2001

Elmau III, March 16, 2004 Interpretations critical commentary Flares and CMEs Interactions between CMEs Association with global waves Disconnection and current sheets Particle acceleration Nature of coronal equilibrium The problem of CME homology Formation of flux rope

Elmau III, March 16, 2004 Issue #1: Flares and CMEs Zhang et al, 2001

Elmau III, March 16, 2004 Issue #2: Interactions between CMEs Gopalswamy, 2004

Elmau III, March 16, 2004 Issue #3: Association with global waves Hudson et al., 2003

Elmau III, March 16, 2004 Issue #4: Disconnection and current sheets Ko et al., 2003

Elmau III, March 16, 2004 Issue #5: Particle acceleration Klassen, Pohjolainen & Klein, 2003

Elmau III, March 16, 2004 Issue #6: Nature of coronal equilibrium

Elmau III, March 16, 2004 Issue #7: The problem of CME homology Nitta-Hudson 2001

Elmau III, March 16, 2004 Issue #8: Formation of flux rope July 15, 2002: Fletcher et al. (2004) Gary & Moore (2004) Li et al. (2004) Lui et al. (2003)

Elmau III, March 16, 2004 Li et al., 2004

Elmau III, March 16, 2004 Conclusions The new evidence points to a tight relationship between CME and flare brightening. The CME energy seems to be stored in the low corona prior to eruption. We have a mystery regarding shock strength and diffusive shock acceleration theory.