An approach to the development of magnetic shear

Details An approach to the development of magnetic shear An approach to the development of magnetic shear

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992cha%26a..16..207w&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 16, Issue 2, p. 207-214.

Astronomy and Astrophysics

Astrophysics

1

The Sun-Magnetic Field-Magnetic Shear

Scientific paper

In view of an approximate description of magnetic shear by non-potential character of a force-free magnetic field, the force-free factor α would be a measure of magnetic shear, and the shear development would be analytically described by a differential equation dα/dt=1/β2∇.G+V.∇α, where, G = ∂B/∂t × B, might be called as the generation function of magnetic shear. It is clearly shown by this equation that the magnetic shear is generated by local dynamo action resulting from the interaction between magnetic field and plasma motion. It is also illustrated that the squeezing and pressing of opposite polarity fields, the flux emergence and submergence would be as effective as shear motion in producing magnetic shear.

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