The role of sunspot umbral rotation in triggering solar flares

dc.contributor.author	Sundararaman, K
dc.contributor.author	Ramesh, K. B
dc.contributor.author	Selvendran, R
dc.date.accessioned	2008-05-27T07:37:09Z
dc.date.available	2008-05-27T07:37:09Z
dc.date.issued	2003
dc.identifier.citation	BASI, Vol. 31, No. 2, pp. 101 - 109	en
dc.identifier.uri	http://hdl.handle.net/2248/2349
dc.description.abstract	The evolution of large active regions NOAA 9393 and NOAA 9433 observed during March and April 2001 respectively on their successive rotation and the active region NOAA 10069 that appeared during August 2002 were studied. Kodaikanal photoheliogram and Hα Spectroheliogram data of these active regions were analyzed to identify the flare triggering mechanism. It is found that the umbral rotation in these δ -type sunspots plays an important role for the occurrence of flares. The flare locations were generally near sites where the umbrae of the sunspot underwent more rotation.	en
dc.format.extent	313456 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/2003BASI...31..101S	en
dc.subject	Sun	en
dc.subject	Umbra	en
dc.subject	Sunspot	en
dc.subject	Flare	en
dc.title	The role of sunspot umbral rotation in triggering solar flares	en
dc.type	Article	en