A New Model for the Distribution of Flare Energies

Details A New Model for the Distribution of Flare Energies A New Model for the Distribution of Flare Energies

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996soph..167..321l&link_type=abstract

Solar Physics, Volume 167, Issue 1-2, pp. 321-331

Physics

17

Scientific paper

A new model is presented for the distribution of solar (and stellar) flare energies. Flares are assumed to result from energy release in multiple reconnecting current sheets (RCSs) in the solar corona. The model takes into account both the dynamical evolution of separate RCSs and their interaction by virtue of coalescence. Thus an attempt is made to generalize previously suggested avalanche and RCS models for the flare frequency distribution. The number of RCSs is not specified and the strength of their interaction is governed by a coalescence parameter. Under quite general assumptions, the resulting distribution can be approximated by a power law with the slope 3/2 < α < 7/4, as required by numerous observations. A softer distribution of numerous ‘nanoflares’, responsible for the coronal heating, is also possible under suitable choice of parameters.

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