Network and plage indices from Kodaikanal Ca-K data

dc.contributor.author	Raju, K. P
dc.contributor.author	Singh, J
dc.date.accessioned	2014-02-06T09:32:55Z
dc.date.available	2014-02-06T09:32:55Z
dc.date.issued	2014-02
dc.identifier.citation	Research in Astronomy and Astrophysics, Vol. 14, No. 2, 229	en
dc.identifier.issn	1674-4527
dc.identifier.uri	http://hdl.handle.net/2248/6543
dc.description	Restricted Access	en
dc.description.abstract	The Ca II K filtergrams from Kodaikanal Solar Observatory have been used to study solar activity. The images are dominated by the chromospheric network and plages. Programs have been developed to obtain the network and plage indices from the daily images as functions of solar latitude and time. Preliminary results from the analysis are reported here. The network and plage indices were found to follow the sunspot cycle. A secondary peak is found during the period of declining activity in both the indices. A comparison of network indices from the northern and the southern hemispheres shows that the former is more active than the latter. However such an asymmetry is not clearly seen in the plage index.	en
dc.language.iso	en	en
dc.publisher	IOP Publishing	en
dc.relation.uri	http://dx.doi.org/10.1088/1674-4527/14/2/010	en
dc.rights	© IOP Publishing	en
dc.subject	Sun: chromosphere	en
dc.title	Network and plage indices from Kodaikanal Ca-K data	en
dc.type	Article	en