Spectroscopic Observations of an Evolving Flare Ribbon Substructure Suggesting Origin in Current Sheet Waves
Brannon, S. R., D. W. Longcope, and J. Qiu, Spectroscopic Observations of an Evolving Flare Ribbon Substructure Suggesting Origin in Current Sheet Waves, ApJ, 810, 4 (2015) (ADS)
(click on the image for a larger version)
Trying to explain some unique signatures of flows inferred from EUV
observations.
Unique, but perhaps other cases will appear: the evaporation flows appear to
*gyrate as they expand along flux tubes embedded in the flare ribbons.
This is attributed to MHD instabilities in the current sheet (upper panel),
possibly
Kelvin-Helmholtz or
tearing mode; these produce
large-scale displacements that propagate down to the flare ribbons.
The Archivist speculates that
Poynting flux might be involved here.
Trying to explain some unique signatures of flows inferred from EUV observations. Unique, but perhaps other cases will appear: the evaporation flows appear to *gyrate as they expand along flux tubes embedded in the flare ribbons. This is attributed to MHD instabilities in the current sheet (upper panel), possibly Kelvin-Helmholtz or tearing mode; these produce large-scale displacements that propagate down to the flare ribbons. The Archivist speculates that Poynting flux might be involved here.