Spot and filament rotation in a sigmoidal flare

dc.contributor.author	Sundararaman, K
dc.contributor.author	Ramesh, K. B
dc.contributor.author	Selvendran, R
dc.date.accessioned	2008-04-11T11:39:36Z
dc.date.available	2008-04-11T11:39:36Z
dc.date.issued	2001
dc.identifier.citation	BASI, Vol. 29, No. 1, pp. 77 - 88	en
dc.identifier.uri	http://hdl.handle.net/2248/2221
dc.description.abstract	The role played by the rotation of the umbrae in a sunspot with respect to the H? filament in inducing magnetic shear for the sigmoidal brightening is reported in this paper. We carried out these studies by using photoheliogram and filtergram data. In the absence of vector magnetogram at Kodaikanal, an alternative method has been attempted to evaluate shear by carefully analyzing the photospheric and chromosphric environment of the solar active regions. It has been found that a large value of shear change observed in the active region is responsible for the triggering of a sigmoidal related flare.	en
dc.format.extent	1247121 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	Astronomical Society of India	en
dc.relation.uri	http://adsabs.harvard.edu/abs/2001BASI...29...77S	en
dc.subject	Flares	en
dc.subject	Sunspots	en
dc.subject	Filaments	en
dc.subject	Sigmoids	en
dc.subject	Shear	en
dc.title	Spot and filament rotation in a sigmoidal flare	en
dc.type	Article	en