Oscillatory processes in solar flares
Oct, 20108 pages
Published in:
- Plasma Phys.Control.Fusion 52 (2010) 124009
e-Print:
- 1010.0063 [astro-ph.SR]
View in:
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Abstract: (arXiv)
Electromagnetic (radio, visible-light, UV, EUV, X-ray and gamma-ray) emission generated by solar and stellar flares often contains pronounced quasi-periodic pulsations (QPP). Physical mechanisms responsible for the generation of long-period QPP (with the periods longer than one second) are likely to be associated with MHD processes. The observed modulation depths, periods and anharmonicity of QPP suggest that they can be linked with some kind of MHD auto-oscillations, e.g. an oscillatory regime of magnetic reconnection. Such regimes, of both spontaneous and induced nature, have been observed in resistive-MHD numerical simulations. The oscillations are essentially nonlinear and non-stationary. We demonstrate that a promising novel method for their analysis is the Empirical Mode Decomposition technique.- 96.50.Tf
- 96.60.qe
- 96.60.Iv
References(26)
Figures(2)