Variations in Oscillation Frequencies From Minimum to Maximum of Solar Activity

Details Variations in Oscillation Frequencies From Minimum to Maximum of Solar Activity Variations in Oscillation Frequencies From Minimum to Maximum of Solar Activity

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003soph..213..257j&link_type=abstract

Solar Physics, v. 213, Issue 2, p. 257-268 (2003).

Physics

10

Scientific paper

The temporal variation in intermediate-degree-mode frequencies is analysed using helioseismic data which cover the minimum to the maximum phase of the current solar cycle. To study the variation in detail, the measured frequency shifts of f and p modes are decomposed into two components, viz., oscillatory and non-oscillatory. The f-mode frequencies exhibit prominent oscillatory behavior in contrast to p modes where the oscillatory nature of the frequencies is not clearly seen. Also, the oscillatory part contributes significantly to the f-mode frequencies while p-mode frequencies have maximum contribution from the non-oscillatory part. The amplitude of both oscillatory and non-oscillatory parts is found to be a function of frequency. The non-oscillatory part is observed to have a strong correlation with solar activity.

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