S320p.39 — Excitation of Resonant Helioseimic Modes by Solar Flares.

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Aug 10th at 6:00 PM until 7:30 PM

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Author(s): John W. Leibacher2, Frédéric Baudin1, Maria Cristina Rabello Soares, 3

Institution(s): 1. Institut d'Astronhysique Spatiale, 2. National Solar Observatory, 3. Universidade Federal de Minas Gerais

Flares are known to excite propagating sound waves in the solar atmosphere, and Maurya et al. (2009), using a local analysis (ring diagrams) of the 2003 Halloween flare, showed that they excite resonant p-modes as well. We confirm and extend here these results by:
-applying the same analysis to other locations on the Sun at the time of the Halloween flare
-analyzing other events also showing a signature of p-mode excitation
-looking in detail at the results of the ring diagrams analysis in terms of noise fitting and the center-to-limb variation of ring-diagram power.