Computer Science
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.508..263b&link_type=abstract
In: Proceedings of the SOHO 11 Symposium on From Solar Min to Max: Half a Solar Cycle with SOHO, 11-15 March 2002, Davos, Switze
Computer Science
Solar Coronal Heating
Scientific paper
A coronal heating model is proposed which predicts heating by a series of events of various energies, analogous to flares and the often discussed "nanoflares". We suggest that an energy release event occurs when a field becomes unstable to ideal MHD modes, with dissipation during the nonlinear phase of such an instability due to fine-scale structures such as current sheets. The energy release during this complex dynamic period can be evaluated by assuming the field relaxes to a minimum energy state subject to the constraint of helicity conservation. A model problem is studied: a cylindrical coronal loop, with a current profile generated by slow twisting of the photospheric footpoints parametrised by two values of α (the ratio of current density to field strength). Different initial α profiles, corresponding to different footpoint twisting profiles, lead to energy release events of a wide range of magnitudes.
Browning Philippa K.
van der Linden Ronald A. M.
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