Intermediate-term periodicities in soft x-ray flare index during solar cycles 21, 22 and 23

dc.contributor.author	Joshi, B.
dc.contributor.author	Joshi, A.
dc.date.accessioned	2009-07-31T06:10:08Z
dc.date.available	2009-07-31T06:10:08Z
dc.date.issued	2005
dc.identifier.uri	http://hdl.handle.net/123456789/212
dc.description.abstract	We have analyzed the intermediate-term periodicities in soft X-ray flare index (FIsₓR) during solar cycles 21, 22 and 23. Power-spectral analysis of daily FIsₓR reveals a significant period of 161 days in cycle 21 which is absent during cycles 22 and 23. We have found that in cycle 22 periodicities of 74 and 83 days are in operation. A 123-day periodicity has been found to be statistically significant during part of the current solar cycle 23. The existence of these periodicities has been discussed in the light of earlier results.	en_US
dc.language.iso	en	en_US
dc.relation.ispartofseries	sp226-153
dc.subject	Solar System, X-ray, Solar Cycles	en_US
dc.title	Intermediate-term periodicities in soft x-ray flare index during solar cycles 21, 22 and 23	en_US
dc.type	Article	en_US