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

被引：0
|
作者：
Marsh, MS [1 ]
Walsh, RW [1 ]
Bromage, BJI [1 ]
机构：
[1] Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England
来源：
PROCEEDINGS OF THE SOHO 11 SYMPOSIUM ON FROM SOLAR MIN TO MAX: HALF A SOLAR CYCLE WITH SOHO | 2002年 / 508卷
关键词：
SOHO; GIS; solar; corona; waves; wavelet analysis; oscillations;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
High time resolution (approximate to 13 sec cadence) Solar and Helio-spheric 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 analysis is applied to EUV emission lines covering a temperature range of log T-c=5.3-6.1 K. 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.
引用
收藏
页码：319 / 322
页数：4
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