On the periodicities of sunspots and solar strong hard X-ray bursts |
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Authors: | V K Verma G C Joshi |
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Institution: | (1) Uttar Pradesh State Observatory, Manora Peak, 263 129 Naini Tal, India |
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Abstract: | 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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