Study of periodicities of solar nuclear gamma ray flares and sunspots

dc.contributor.author	Verma, V. K.
dc.contributor.author	Joshi, G. C.
dc.contributor.author	Paliwal, D. C.
dc.date.accessioned	2010-01-18T06:15:50Z
dc.date.available	2010-01-18T06:15:50Z
dc.date.issued	1992
dc.identifier.citation	This article downloded from ADS Free Online Journal	en_US
dc.identifier.uri	http://hdl.handle.net/123456789/443
dc.description.abstract	Here we have carried out a power-spectrum analysis of solar nuclear gamma-ray (NGR) flares observed by SMM and HINOTORI satellites. The solar NGR flares show a periodicity of 152 days, confirming the existence of a 152-158 days periodicity int the occurrence of solar activity phenomena and also indication that the NGR flares are a separate class of solar flares. The power-spectrum analysis of the daily sunspot areas on the Sun for the period 1980-1982 shows a peak around 159 days while sunspot number data do not show any periodicity (Verma and Joshi, 1987). Therefore, only sunspot area data should be treated as an indicator of solar activity and not the daily sunspot number data.	en_US
dc.language.iso	en_US	en_US
dc.relation.ispartofseries	sp138-205
dc.subject	Nuclear gamma ray (NGR), Solar flares	en_US
dc.title	Study of periodicities of solar nuclear gamma ray flares and sunspots	en_US
dc.type	Article	en_US