Curdt, W., E. Landi, T. Wang, and U. Feldman, In-Situ Heating in Active Region Loops, Hvar Observatory Bulletin, 29, 157-165 (2005) (ADS)
(click on the image for a larger version)
A simple cartoon showing charge separation in a flaring loop, with
excitation at one footpoint. That's fine, and the Archivist applauds this
step away from MHD modeling where we have no concept of electrical potential.
The argument here is that there is a pinch instability in the plasma,
propagating up along the flux tube at 100-200 km/s. The paper claims,
however, that there is no need for "evaporation" even though the
electron density may increase by two orders of magnitude. This does
not seem to make sense in terms of any eventual hydrostatic equilibrium
- a very strong law in the solar atmosphere - which should rapidly
restore order after a flare disruption.
A simple cartoon showing charge separation in a flaring loop, with excitation at one footpoint. That's fine, and the Archivist applauds this step away from MHD modeling where we have no concept of electrical potential.
The argument here is that there is a pinch instability in the plasma, propagating up along the flux tube at 100-200 km/s. The paper claims, however, that there is no need for "evaporation" even though the electron density may increase by two orders of magnitude. This does not seem to make sense in terms of any eventual hydrostatic equilibrium - a very strong law in the solar atmosphere - which should rapidly restore order after a flare disruption.