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A wavelet analysis of quasi-periodic variability within the solar corona View all abstracts by submitter

Mike Marsh   Submitted: 2005-11-21 08:47

High time resolution (≍13 sec cadence) Solar and Heliospheric Observatory (SOHO) Coronal Diagnostic Spectrometer (CDS) Grazing Incidence Spectrometer (GIS) time series data is analysed for evidence of quasi-periodic variability in the solar corona. The observations are obtained from a GIS study of a coronal hole boundary region taken in October 1997. A wavelet anaylsis is applied to EUV emission lines covering a temperature range of log Te = 5.3 - 6.1K. Wavelet analysis allows the frequency and temporal information of any periods present within the data to be analysed. Statistically significant periods are found within the range 100 - 900 seconds. Observations of short wavepackets with periods of the order 50 - 100 seconds with durations of 2 - 5 oscillations are reported.

Authors: Marsh, M. S.; Walsh, R. W.; Bromage, B. J. I.
Projects: Soho-CDS

Publication Status: In: Proceedings of the SOHO 11 Symposium on From Solar Min to Max: Half a Solar Cycle with SOHO, 11-15 March 2002, Davos, Switzerland. A symposium dedicated to Roger M. Bonnet. Edited by A. Wilson, ESA SP-508, Noordwijk: ESA Publications Division, ISBN 92
Last Modified: 2005-11-21 08:47
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