Sun as a star - Rotation rates from the CA K-index

dc.contributor.author	Singh, J
dc.contributor.author	Livingston, W. C
dc.date.accessioned	2008-09-22T16:10:35Z
dc.date.available	2008-09-22T16:10:35Z
dc.date.issued	1987-09
dc.identifier.citation	Solar Physics , Vol. 109, No. 2, pp. 387 - 391	en
dc.identifier.issn	0038-0938
dc.identifier.uri	http://hdl.handle.net/2248/3780
dc.description.abstract	Daily measurements for 18 months made at Tucson of the Ca K-index in integrated sunlight have been used to derive solar rotation rates. Power spectral analysis shows that one can obtain a well defined value of solar rotation rate in a period of six months, provided the data are fairly continuous. One might suppose it is possible to study the variation of solar (or stellar) rotation rate with time, a variation arising from a combination of differential rotation and shifts in the active latitude. A comparison between our observed rates and the prevailing dominant activity zones does not support this supposition, at least for the interval studied. Rather, our rates seem to depend on the circumstances of sampling and active region birth and decay.	en
dc.language.iso	en	en
dc.publisher	Kluwer Academic Publishers	en
dc.relation.uri	http://dx.doi.org/10.1007/BF00160661	en
dc.subject	K lines	en
dc.subject	Power spectra	en
dc.subject	Solar rotation	en
dc.subject	Spectrum analysis	en
dc.subject	Error analysis	en
dc.subject	Stellar physics	en
dc.subject	Signal to noise ratios	en
dc.title	Sun as a star - Rotation rates from the CA K-index	en
dc.type	Article	en