Magnetic flux in an active solar region and its correlation with flares

Details Magnetic flux in an active solar region and its correlation with flares Magnetic flux in an active solar region and its correlation with flares

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011arep...55..629p&link_type=abstract

Astronomy Reports, Volume 55, Issue 7, pp.629-636

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The correlation between the magnetic flux in an active solar region and associated powerful solar flares is studied. The behavior of the active regions AR 10486 and AR 10365 is considered. These regions produced a series of class X flares as they crossed the solar disk. The flares appeared when the magnetic flux exceeded 1022 Mx. The magnetic flux remained constant during all the flares except for one. During this flare, the flux decreased by about 10%; this impulsive decrease of the flux was also recorded in the absence of flares. No energy flux from the photosphere to the corona at the time of the flare was observed. The behavior of the photospheric field in AR 10486 and AR 10365 is consistent with a slow accumulation of energy in the corona and the explosive release of energy stored in the magnetic field of a current sheet above an active region during the flare.

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