Stability of Current Sheets in the Solar Corona

Details Stability of Current Sheets in the Solar Corona Stability of Current Sheets in the Solar Corona

Apr 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012soph..277..283a&link_type=abstract

Solar Physics, Volume 277, Issue 2, pp.283-298

Physics

Magnetic Fields, Corona, Current Sheet, Plasma Instabilities

Scientific paper

This work aims at investigating unstable modes of oscillation of quasi-vertical two-dimensional current sheets with sheared magnetic fields under physical conditions typical for the solar corona. We use linear magnetohydrodynamic equations to obtain sets of unstable modes related to the longitudinal inhomogeneity of the current sheet. It is shown that these modes of current sheet oscillations can modulate the current sheet thickness along the polarity inversion line. Based on the obtained results, we propose a scenario which can naturally explain both the quasi-periodic pulsations of hard X-ray emission and the parallel movement of their double footpoint-like sources along the polarity inversion line observed in some eruptive two-ribbon solar flares.

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