Search for short period coronal plasma oscillations SECIS results from 1999 and 2001 total eclipses

Document Type

Conference Proceeding

Publication Date

12-1-2002

Abstract

Results of the analysis of the high-cadence observations of the solar corona, taken with the Solar Eclipse Coronal Imaging System instrument during joint British-Polish expeditions during the total solar eclipses of 1999 August 11 in Bulgaria (12 768 images) and 2001 June 21 in Zambia (16 000 images) are presented. Using data collected during the both solar eclipses we searched for possible periodic changes of the 530.3 nm line intensity emitted by the selected points of the solar corona in the frequency range up to 10 Hz. The time resolution of the collected data is close to 0.05 sec and the pixel size is approximately 4 seconds of arc. The standard photometric processing and correction of the image motions caused by temporal drifts of the instrument pointing were made. Using classical Fourier spectral analysis and wavelet analysis tools we investigated temporal changes of the 530.3 nm coronal line brightness of many thousands of points at various heights and position angles above the solar limb. We did not find any statistically important evidence of periodicity in the frequency range from 1 to 10 Hz in any of the investigated points.

Identifier

0036978446 (Scopus)

Publication Title

European Space Agency Special Publication ESA SP

ISSN

03796566

First Page

967

Last Page

970

Issue

506 II

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