A wavelet analysis of quasi-periodic variability within the solar corona

Details A wavelet analysis of quasi-periodic variability within the solar corona A wavelet analysis of quasi-periodic variability within the solar corona

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.508..319m&link_type=abstract

In: Proceedings of the SOHO 11 Symposium on From Solar Min to Max: Half a Solar Cycle with SOHO, 11-15 March 2002, Davos, Switze

Physics

1

Soho, Gis, Solar, Corona, Waves, Wavelet Analysis, Oscillations

Scientific paper

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.

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