NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Current evolution in a numerical emerging-magnetic-flux modelThe resistive-MHD equations are numerically solved in two-dimensions for an initial-boundary-value problem which models the emergence of magnetic flux from the photosphere into the corona. As the emergence begins a current sheet forms around the emerging region which separates the emerging region from the overlying coronal magnetic field. This current sheet is the source of the free-magnetic energy in the system, and in the limit of zero resistivity it is a simple tangential discontinuity. However, when the resistivity is finite, reconnection between the magnetic field in the emerging region and the overlying coronal magnetic field ensures, and the subsequent evolution of the enveloping current sheet becomes complex. The overall time history of the current evolution is suggestive of the expected current evolution for the pre-flare, impulsive, and main phases of flares.
Document ID
19850021563
Document Type
Conference Paper
Authors
Forbes, T. (New Hampshire Univ. Durham, NH, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1985
Publication Information
Publication: NASA. Marshall Space Flight Center Meas. of Solar Vector Magnetic Fields
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-76
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

IDRelationTitle19850021557Analytic PrimaryMeasurements of Solar Vector Magnetic Fields
Document Inquiry