Notes on discussion of CornSource presentations, Tuesday Oct. 3

Hudson

-Cargill, White, Vlahos, Hudson: Extensive discussion of "nonthermal pressure" 
possibilities
-Tomczak: check Harrison papers for coronal HXR?

Masuda

-Hudson: was there an estimate of the plasma density at the Masuda source
location? - see EM maps
-Krucker: how occulted was this event? Don't really know
-Sui: worried about HXR image method? Probably not
-Vlahos: time scales?
-Vlahos: model inconsistency with electron transport?
-White: how to thermalize at such high temperatures? It's a problem
-Krucker: Would BCS have seen the high-T component? No
-Vlahos, Fletcher, White: Is the target plausible?
-Hudson, Fletcher, Cargill: What is the density? Fletcher: see Tsuneta's paper,
 ApJ 478 (1997)
-Many: full discussion of the cartoon... is the density plausible?
-Fletcher: explanation of 1995, 1997 work; expectation of "collapsing trap"
 models coming now
-Vlahos, Cargill, Fletcher, Hudson: discussion of current sheets and geometry
 "flexible" modeling would probably allow the observed HXR color map
-Vlahos: Attempted re-cartoonification in terms of a simple black box
-Fletcher: But something is really happening up there!
-Veronig: But what about the Neupert effect (and other evidence, such as
 CME/flare association)?
-Hudson: Can't we focus on different kinds of events?
-Fletcher: Orderly footpoint motion...
-Cargill, Fletcher, Hudson, White, Krucker: how does Markus do it?
-Hudson: ad-hoc assumptions in the TOF modeling
-Hudson, White, Cargill: rebuttal of interpretation of looptop turbulence?

-Sui: such a high source is unique... Tomczak will discuss
-Sui: regular looptop sources seen in Low band?

Tomczak

-White: what about single sources? Separate groupings into 4 categories. SXT
 loops determine what's a FP and what's not.
-Krucker, Hudson: selection from peak time biases towards loop top? 
-Cargill: confusion about "inside" in SM's table
-Hudson: error bars in timeseries analysis
-Sui: why use T if one is thinking about a nonthermal model for impulsive
 component? Just arbitrary
-Vlahos: must consider heating as well as acceleration. Isn't this different
 from the Neupert effect? HH answer - No.
-Sui, Krucker: smooth looptop source is like GOES
-Sui: could confuse source separation as motion? No
-Hudson: why not a continuum, rather than a bimodal distribution? Interesting
-Fletcher, Vlahos, White: can really strong scattering really help 
 (Karlicky's idea)? No
-Cargill: see Ross Galloway's recent paper
-Vlahos: are there distinct HXR and SXR sources? No
-Krucker: Masuda source separation is larger

Sui

-Hudson: I'm confused. Ans: Wait.
-White: What is the geometrical distinction - projection?
-Cargill: Eeeek! (viewing Shibata cartoon)
-Hudson: Can't really believe the Shibata et al. 1995 plasmoids
-Cargill: Can't we have solitons instead of plasmoids anyway?
-Vlahos: Can you do imaging spectroscopy? Maybe some...
-Vlahos: Does the coronal source motion appear to affect the flare loops? No,
  but the timing is interesting
-Vlahos: If one is seeing the higher end, why not the "current sheet" itself?
  Interpret as piling-up against overlying field
-Fletcher: filament? Didn't see a filament, but there was a CME
-White, Vlahos: Consistent with cooling times? With thick-target separation?
  Continuous reconnection could explain it
-Vlahos: Have done energetics analysis of current sheet? How much magnetic
  energy? 
-Krucker: It's thermal, not so difficult
-Vlahos: Few studies of heating by current sheet; need analysis of energetics
-Cargill: Please show the Shibata cartoon again - is the energy separation
  just a geometrical effect? Probably not
-Hudson: Probably the temperature structure also would be consistent with an
  arcade of distinct loops
-Krucker: Do the multiple sources move coherently? How do you explain the
  complex structure of the loop? CLEAN looks better than Pixons here (?)
-Vlahos: What is the size? Hard to be sure...
-Hudson: Beware of temperature dependence in EUV images. But it looks like
  motion
-Fletcher, Vlahos, Cargill: Hundhausen-type current sheet?
-White: Let the presentation continue!
-White: Note that we are talking about a flux rope now, rather than a 2D
  current sheet.
-Cargill: Can't really talk about causality in a global LOE description
-Fletcher: Where's the flux rope? White: it's irrelevant
-Cargill: Why not a 3-legged event?
-White: Li-Gan imaging at Nobeyama may be an artifact, especially at 24 GHz
-Cargill: Of the 88, how many CME events?
-Hudson: explanation of "implosion" idea. General skepticism
-Vlahos: What is the morphological difference? Looptops
-Hudson: Is this the evaporation flow? Yes (28-Nov-02 event)
-Cargill: If not evaporation, then maybe Alfven-speed fluctuations in heating?
-Hudson: Worry about 6.4 keV vs 6.7 keV in terms of nonthermal interpretation
-Cargill: Tearing mode as an alternative? We're considering transport mainly
-Vlahos: What sort of simulations? Single fixed loop, vary the accelerator
  parameters. The model can't explain everything, though