Intensity variation in sunspots

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DC Field	Value	Language
dc.contributor.author	Ananthakrishnan, R	-
dc.date.accessioned	2010-03-11T16:37:40Z	-
dc.date.available	2010-03-11T16:37:40Z	-
dc.date.issued	1951-08	-
dc.identifier.citation	Nature, Vol. 168, No. 4268, pp. 291 - 292	en
dc.identifier.issn	0028-0836	-
dc.identifier.uri	http://hdl.handle.net/2248/5071	-
dc.description	Restricted Access	-
dc.description.abstract	The most conspicuous and readily observed feature of a normal sunspot is a dark central umbra surrounded by a less dark penumbral fringe which, under good seeing conditions, appears to be composed of converging filaments directed radially inwards. Secchi1 concluded from his visual observations that the penumbra is brighter at its inner edge, that is, towards the periphery of the umbra and darker at its outer edge. This feature is clearly shown in his drawings of sunspots.	en
dc.language.iso	en	en
dc.publisher	Nature Publishing Group	en
dc.relation.uri	http://www.nature.com/nature/journal/v168/n4268/abs/168291b0.html	en
dc.rights	© Nature Publishing Group	en
dc.subject	Intensity Variation	en
dc.subject	Sunspots	en
dc.title	Intensity variation in sunspots	en
dc.type	Article	en
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