Flares and velocity patterns in the vicinity of separatrices.

Details Flares and velocity patterns in the vicinity of separatrices. Flares and velocity patterns in the vicinity of separatrices.

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996acasn..37...43z&link_type=abstract

Acta Astron. Sin., Vol. 37, No. 1, p. 43 - 50

Astronomy and Astrophysics

Astronomy

Solar Magnetic Fields: Structure, Solar Magnetic Fields: Solar Flares, Solar Atmosphere: Magnetic Reconnection

Scientific paper

In a few active regions, the close association of flares to flux cancellation in the photosphere has been observationally revealed. Usually, flares are preceded by cancellation from several hours to a day. In this environment, the authors further identify a characteristic velocity pattern: a narrow band of blue shift in the separatrices and rather broad patches of red shift on both sides where there would appear flare ribbons. This revelation indicates that the cancellation of magnetic flux is basically a slow magnetic reconnection in the lower atmosphere, and this slow reconnection has immediate bearing on the fast energy release in the corona.

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