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Generation of Quasi-periodic Waves and Flows in the Solar Atmosphere by Oscillatory Reconnection View all abstracts by submitter

James McLaughlin   Submitted: 2012-04-03 03:57

We investigate the long-term evolution of an initially buoyant magnetic flux tube emerging into a gravitationally stratified coronal hole environment and report on the resulting oscillations and outflows. We perform 2.5-dimensional nonlinear numerical simulations, generalizing the models of McLaughlin et al. (2009) and Murray et al. (2009). We find that the physical mechanism of oscillatory reconnection naturally generates quasi-periodic vertical outflows, with a transverse/swaying aspect. The vertical outflows consist of both a periodic aspect and evidence of a positively directed flow. The speed of the vertical outflow (20-60 km s-1) is comparable to those reported in the observational literature. We also perform a parametric study varying the magnetic strength of the buoyant flux tube and find a range of associated periodicities: 1.75-3.5 minutes. Thus, the mechanism of oscillatory reconnection may provide a physical explanation to some of the high-speed, quasi-periodic, transverse outflows/jets recently reported by a multitude of authors and instruments.

Authors: McLaughlin, J. A., Verth, G., Fedun, V., Erdélyi, R.
Projects: None

Publication Status: ApJ (2012) 749, 30
Last Modified: 2012-04-04 08:13
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