Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...437..491l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 437, no. 1, p. 491-504
Astronomy and Astrophysics
Astrophysics
64
Coronal Loops, Current Sheets, Magnetohydrodynamics, Solar Magnetic Field, Statistical Analysis, Stellar Evolution, Stellar Models, Mathematical Models, Plasma Heating
Scientific paper
A resistive magnetohydrodynamic model is proposed for a straightened coronal loop subject to continuous slow fluctuating random footpoint driving. The characteristic timescale of this driving motion is much longer than the Alfven transit time along the loop. The governing equations for this model are integrated numerically until a statistical steady state is attained. In steady state the spatial structure of the magnetic field is dominated by thin regions of intense current density indicative of current sheets. Using a simple model of resistive reconnection the statistical steady state can be understood as a random superposition of current sheets. This model predicts the scaling of the sheet parameters and the global heating with resistivity. The scaling is verified over the small range of values achievable in these numerical experiments.
Longcope Dana Warfield
Sudan R. N.
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