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Alfvénic Wave Heating of the Upper Chromosphere in Flares View all abstracts by submitter

Jeffrey Reep   Submitted: 2016-01-11 11:08

We have developed a numerical model of flare heating due to the dissipation of Alfvénic waves propagating from the corona to the chromosphere. With this model, we present an investigation of the key parameters of these waves on the energy transport, heating, and subsequent dynamics. For sufficiently high frequencies and perpendicular wave numbers, the waves dissipate significantly in the upper chromosphere, strongly heating it to flare temperatures. This heating can then drive strong chromospheric evaporation, bringing hot and dense plasma to the corona. We therefore find three important conclusions: (1) Alfvénic waves, propagating from the corona to the chromosphere, are capable of heating the upper chromosphere and the corona, (2) the atmospheric response to heating due to the dissipation of Alfvénic waves can be strikingly similar to heating by an electron beam, and (3) this heating can produce explosive evaporation.

Authors: Reep, J.W., & Russell, A.J.B.
Projects: None

Publication Status: Accepted to ApJL
Last Modified: 2016-01-13 12:46
Go to main E-Print page  Sources of Quasi-Periodic Pulses in the 18 August 2012 Flare  Thermal and non-thermal emission from reconnecting twisted coronal loops  Edit Entry  Download Preprint  Delete Entry 

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