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Observations of Hα Intensity Oscillations in a Flare Ribbon View all abstracts by submitter

R.T.James McAteer   Submitted: 2005-02-22 10:00

High-cadence Hα blue wing observations of a C9.6 solar flare obtained at Big Bear Solar Observatory using the Rapid Dual Imager are presented. Wavelet and time-distance methods were used to study oscillatory power along the ribbon, finding periods of 4080 s during the impulsive phase of the flare. A parametric study found statistically significant intensity oscillations with amplitudes of 3% of the peak flare amplitude, periods of 69 s (14.5 mHz) and oscillation decay times of 500 s. These measured properties are consistent with the existence of flare-induced acoustic waves within the overlying loops.

Authors: McAteer, R.T.J., Gallagher P.T., Brown, D.S., Bloomfield, D.S., Moore R., Williams, D.R., Mathioudakis, M., Katsiyannis, A. Keenan, F.P.
Projects: None

Publication Status: 2005, APJ, 620, 1101
Last Modified: 2005-02-22 10:00
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