On the Periodicities of Sunspots and Solar Strong Hard X-Ray Bursts

Details On the Periodicities of Sunspots and Solar Strong Hard X-Ray Bursts On the Periodicities of Sunspots and Solar Strong Hard X-Ray Bursts

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..114..415v&link_type=abstract

Solar Physics, Volume 114, Issue 2, pp.415-418

Physics

10

Scientific paper

In the present investigation, we have carried out power spectrum analysis of sunspot number and great hard x-ray (GHXR) burst (equal to or greater than 10,000 counts per second) for a period of about 6 years. The GHXR bursts show a periodicity of about 155 days. On the other hand, sunspot numbers do not show any periodicity. The GHXR burst periodicity confirms the existence of a 152 158 days periodicity in the occurrence of solar energetic events. Further, the GHXR bursts are showing periodicity independently indicating that the GHXR bursts are a separate class of X-ray flares.

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