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Dynamical Evolution of a Coronal Streamer-Flux Rope System: 2. A Self-Consistent Non-Planar Magnetohydrodynamic SimulationThe dynamical response of a helmet streamer to a flux rope escape from the sub-photosphere is examined in a physically self-consistent manner within the approximation of axisymmetric three-dimensional magnetohydrodynamics (i.e., so-called '2 1/2 D'). In contrast to the previous planar analyses of Paper 1 (Wu, Guo, and Wang), the present study shows, with the inclusion of out-of-plane components of magnetic and velocity fields, that the magnetic configuration represents a helical flux rope instead of a planar bubble as shown in Paper 1. Because of this more physically-realistic configuration, we are able to examine the dynamical evolution of the helical flux rope's interaction with the helmet streamer. This process leads to the formation of two parts of the solar mass ejection: (i) the expulsion of the helmet dome due to eruption of this flux rope, and (ii) the flux rope's eruption itself. When this two-part feature propagates out to the interplanetary space, it exhibits all the physical characteristics of observed interplanetary magnetic clouds. These numerical simulations also show that the dynamical behavior of the streamer-flux rope system has three distinct states: (i) quasi-equilibrium, (ii) non-equilibrium, and (iii) eruptive state depending on the energy level of the flux rope.
Document ID
19970017827
Acquisition Source
Headquarters
Document Type
Contractor Report (CR)
Authors
Wu, S. T. (Alabama Univ. Huntsville, AL United States)
Guo, W. P. (Alabama Univ. Huntsville, AL United States)
Dryer, Murray (Colorado Univ. Boulder, CO United States)
Date Acquired
September 6, 2013
Publication Date
October 15, 1996
Publication Information
Publication: Solar Physics
Publisher: Kluwer Academic Publishers
Volume: 6
Subject Category
Solar Physics
Report/Patent Number
NAS 1.26:203253
NASA-CR-203253
Accession Number
97N19941
Funding Number(s)
CONTRACT_GRANT: NAGw-4665
CONTRACT_GRANT: N00014-C-95-2058
Distribution Limits
Public
Copyright
Public Use Permitted.

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