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WORKING GROUP C: ENERGETIC PARTICLE OBSERVATIONS

WORKING GROUP C: ENERGETIC PARTICLE OBSERVATIONS. Co-Chairs: Klecker, Kunow SUMMARY FROM SESSION 1B Discussion of Questions from last Workshop Selection of Topics for Further Discussion + Presentations Selection of Topics to be Transferred to other WG.

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WORKING GROUP C: ENERGETIC PARTICLE OBSERVATIONS

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  1. WORKING GROUP C: ENERGETIC PARTICLE OBSERVATIONS Co-Chairs: Klecker, Kunow SUMMARY FROM SESSION 1B • Discussion of Questions from last Workshop • Selection of Topics for Further Discussion + Presentations • Selection of Topics to be Transferred to other WG CME Workshop Elmau, Feb 6 - 12, 2003

  2. Topics for Further Discussion + Presentations (P) in WG C - 1 • How does the timing of e and p injection as derived from interplanetary measurements compare with the event onsets observed at the Sun (e.g. CME, type II, type III, flare). P: p-, e - onset and radio signatures (Klein+Posner) P: Observations at high latitudes (Ulysses) (Dalla) • Shock and / or Flare Acceleration in Large SEP Events Large events with E> 50 MeV p flux are flare related Large events with high Fe/O ratio, high Fe charge states at > 20 MeV/n P: Correlation of Type III-l with p; Anti-correlation of high Fe/O with Shock transit-time (Cane) CME Workshop Elmau, Feb 6 - 12, 2003

  3. Topics for Further Discussion + Presentations (P) in WG C - 2 P: 3He observation in large events (Klein) P: The May 7, 2001 event as seen by ACE and Ulysses (CME, no flare) (Simnet)P: Electron Acceleration (Simnet) P: Multiple shocks / CMEs and particle acceleration (Gopalswamy) • Energy dependent ionic charge states – stripping at low coronal altitudes? Q/M dependent acceleration / injection effects? Transition from Solar Wind source (low energy) to ‘flare’ source (high energy) - > case studies • Comparison of accelerated particles at the shock and in the post-shock region with upstream waves and downstream turbulence. P: Case studies with negative result (no waves observed) (Lario)? CME Workshop Elmau, Feb 6 - 12, 2003

  4. Topics for Further Discussion + Presentations (P) in WG C - 3 • How can we use different source populations to explore acceleration / injection effects (e.g. SW source vs. Pickup He+). P: Suprathermal He+ observations in CMEs / IP shocks (Kucharek) • Particle Propagation P: Study of decay time profiles - spectra in decay phase (Kecskemety) P: Evidence for perpendicular diffusion in large events. (Cane) • The quiet-time component of energetic particles (e and ions). P: Quit-time ion observations (Kecskemety?) • Extension of Event List from CME Workshop 1 CME Workshop Elmau, Feb 6 - 12, 2003

  5. Questions Proposed to Transfer to other WG - 1 Transfer to • What are EIT waves? (Evidence for a shock?) F • Why are meter wavelength type II bursts nearly always present F and yet die out within about 10 solar radii? • The question of mass replenishment after CME lift-off. F • Is there a non-radial component in the expansion of CMEs? G (important for particle acceleration, e.g. at CME flanks?) • Do (1) CMEs starting with high velocities, (2) CMEs accelerating in the corona have different SEP signatures? G + C CME Workshop Elmau, Feb 6 - 12, 2003

  6. Questions Proposed to Transfer to other WG - 2 • What can solar energetic particles tell us about the large scale topology of CMEs and the global structure of the corona? G + C ParticelObservations within CMEs (Lario) Perpendicular diffusion into CME (Rodriguez-Pacheco) • The effect of CMEs on GCR modulation during solar minimum and maximum is different. Why? -> Differences in large scale topology, GMIRs. H CME Workshop Elmau, Feb 6 - 12, 2003

  7. QUESTIONS FOR DISCUSSION WITH WG D • How do CMEs effect the energetic particle population Shock; trigger of acceleration at different location? • M/Q-dependent systematics in elemental and isotopic abundances in CME / IP shock related SEP events (Injection? Acceleration? Transport?) • How can we understand the observed correlation between Heavy Ion abundances and ionic charge states in Gradual and Impulsive Events • Energy dependence of ionic charge states at ~ 0.020 - 20 MeV/nuc (M/Q dependent acceleration effect?, stripping at low altitudes?, flare particles at high energies?) • Acceleration at IP / Coronal Shocks and Flare in the same event? Acceleration mechanism in flare. Energetics? Particle Numbers? CME Workshop Elmau, Feb 6 - 12, 2003

  8. OUR PROGRAM FOR TODAY • 10:30 Meeting WG C + D (+ continue C discussions) • 15:00 Meeting WG C + B (+ continue C discussions) CME Workshop Elmau, Feb 6 - 12, 2003

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