IIA Institutional Repository

Solar Active Longitudes from Kodaikanal White-Light Digitized Data

Show simple item record

dc.contributor.author Mandal, Sudip
dc.contributor.author Chatterjee, Subhamoy
dc.contributor.author Banerjee, D
dc.date.accessioned 2020-11-17T14:30:28Z
dc.date.available 2020-11-17T14:30:28Z
dc.date.issued 2017-01-20
dc.identifier.citation The Astrophysical Journal, Vol. 835, No. 1, 62 en_US
dc.identifier.issn 0004-637X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7165
dc.description Restricted Access © The American Astronomical Society https://doi.org/10.3847/1538-4357/835/1/62 en_US
dc.description.abstract The study of solar active longitudes has generated great interest in recent years. In this work we have used a unique, continuous sunspot data series obtained from the Kodaikanal observatory and revisited the problem. An analysis of the data shows a persistent presence of active longitudes during the whole 90 years of data. We compared two well-studied analysis methods and presented their results. The separation between the two most active longitudes is found be roughly 180° for the majority of time. Additionally, we also find a comparatively weaker presence of separations at 90° and 270°. The migration pattern of these active longitudes as revealed by our data is found to be consistent with the solar differential rotation curve. We also study the periodicities in the active longitudes and found two dominant periods of ≈1.3 and ≈2.2 years. These periods, also found in other solar proxies, indicate their relation with the global solar dynamo mechanism. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Sun: activity en_US
dc.subject Sun: oscillations en_US
dc.subject Sunspots en_US
dc.title Solar Active Longitudes from Kodaikanal White-Light Digitized Data en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account