Correlation of multi-resolution analyses of active region magnetic field structure with flare activity

Details Correlation of multi-resolution analyses of active region magnetic field structure with flare activity Correlation of multi-resolution analyses of active region magnetic field structure with flare activity

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh13a1094i&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH13A-1094

Physics

7519 Flares, 7524 Magnetic Fields

Scientific paper

Two multi-resolution analyses are used to decompose active region magnetic fields into objects of different lengthscales, allowing one to examine the structure of the active region field at different lengthscales. Lines separating opposite polarity groupings of flux at different lengthscales are found (a generalization of the notion of a magnetic neutral line). It is shown that the average magnetic field gradient for alpha, beta, beta-gamma, and beta-gamma-delta active regions increases in the order listed, and that the order is maintained over all length-scales. Since magnetic field gradient is strongly linked to active region activity, such as flares, this study demonstrates that, on average, the Mt. Wilson classification encodes the notion of activity over all lengthscales in the active region, and not just those lengthscales at which the strongest field gradients are found. Properties of these generalized neutral lines are also correlated with GOES flare activity in a search for an indicator of flare activity.

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