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Streamer EvaporationEvaporation is the consequence of heating near the top of streamers in ideal Magnetohydrodynamics (MHD) models, where the plasma is weakly contained by the magnetic field. Heating causes slow opening of field lines and release of new 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 there are losses by thermal conduction and radiation. Physically, heating is also expected to depend on ambient conditions. We use our global MHD model with thermal conduction to examine the effect of changing the heating scale height. We also apply and 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 approximately 2 x 10(exp 6) K.
Document ID
19990088415
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Suess, S. T.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Wang, A.-H.
(Alabama Univ. Huntsville, AL United States)
Wu, S. T.
(Alabama Univ. Huntsville, AL United States)
Nerney, S. F.
(Ohio Univ. Lancaster, OH United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1998
Subject Category
Plasma Physics
Meeting Information
Meeting: SOHO 7
Location: Northeast Harbor, ME
Country: United States
Start Date: September 1, 1998
Distribution Limits
Public
Copyright
Other

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