Streamer Evaporation |
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Authors: | S T Suess A-H Wang S T Wu S F Nerney |
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Institution: | (1) NASA Marshall Space Flight Center, Huntsville, AL, USA;(2) University of Alabama in Huntsville, USA;(3) Ohio University in Lancaster, USA |
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Abstract: | Streamer evaporation is the consequence of heating in ideal MHD models because plasma is weakly contained by the magnetic
field. Heating causes inflation, opening of field lines, and release of solar wind. It was discovered in simulations and,
due to the absence of loss mechanisms, the ultimate end point is the complete evaporation of the streamer. Of course streamers
do not behave in this way because of losses by thermal conduction and radiation. Heating is also expected to depend on ambient
conditions. We use a global MHD model with thermal conduction to examine the effect of changing the heating scale height.
We also extend an analytic model of streamers developed by Pneuman (1968) to show that steady streamers are unable to contain
plasma for temperatures near the cusp greater than ∼ 2 × 106 K.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | corona streamers magnetohydrodynamics |
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