Vertical current and flare sites in an active region in 1989 October.

Details Vertical current and flare sites in an active region in 1989 October. Vertical current and flare sites in an active region in 1989 October.

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...324..713z&link_type=abstract

Astronomy and Astrophysics, v.324, p.713-716

Astronomy and Astrophysics

Astrophysics

7

Sun: Flares, Sun: Magnetic Fields

Scientific paper

We study the configuration of the vector magnetic field in a δ-active region in October 1989. The distribution of the foot points of the electric current loops can be confirmed by the photospheric vertical current, which is inferred by the observational photospheric vector magnetograms resolved 180°-ambiguity of the transverse components. The distribution of the photospheric electric current can be separated by several kinds of simple structures in the active region. The formation of new electric current in the photosphere is caused by the emergence of a magnetic flux or is related with the magnetic shear and squeeze. In the electric current picture, the flares are probably caused by the interaction of different electric current loops.

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