Tangential discontinuities and the optical analogy for stationary fields. VII. Effects of resistivity
作者:
E.N. Parker,
期刊:
Geophysical & Astrophysical Fluid Dynamics
(Taylor Available online 1990)
卷期:
Volume 55,
issue 3-4
页码: 161-182
ISSN:0309-1929
年代: 1990
DOI:10.1080/03091929008204112
出版商: Taylor & Francis Group
关键词: Tangential discontinuities;force-free fields;helicity.
数据来源: Taylor
摘要:
The relatively large resistivity in the solar photosphere and chromosphere softens the ideal tangential discontinuities of magnetostatic equilibrium into continuous transitions in field direction over scales of 0.1–10 km. This softening is communicated upward at the Alfvén speed into the active solar corona. The degree of softening is a vital part of the theory of magnetic heat input to the active X-ray corona, because the very low resistivity of the coronal gas provides effective dissipation only if the current sheets are reduced to a thickness of 10−2km.
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