Ji: Collaborating with RHESSI in H-alpha blue wing

  • Tasks (why the blue wing? See Gayley thesis; recent Ding paper)
  • May 27, 2002 18:00: kernel emissions may lag HXR
    - Stationary reconnection point? Looptop source? Nice filament eruption associated with HXR and EUV
    - substantial discussion of geometry and interpretation
    - Very high deceleration speed of filament - 10g => tension force
    - Corrected quicklook plots
    - Conclusions - confined "thermal" event. stationary reconnection. no opening field. tension force. Halpha blue not like HXR. post-flare loop
    - Vigorous discussion of many points. This flare is a nice example of a "frustrated eruption" (Rust), something that seems to happen fairly commonly for events below X class. The Neupert effect seems a bit anomalous, to the extent that the odd term "thermal flare" has been used.
  • September 9, 2002 17:00
    - Conjugate light curves can be found
    - Suggest 0.5-sec delay between H-alpha footpoints @ 40 msec sampling; these results can be criticized as overinterpretation (Dennis)
    - Discussion points to the need for better time-series analysis, including better RHESSI light curves
    - Another footpoint pair suggests several-second delay => overinterpretation
    - Summary: different heating mechanisms for conjugate footpoints?
    - Suggest propagation "braking" effect? Again much discussion, including the topic of whether the HXR footpoint asymmetry result is a valid one