Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7419
Title: Century long study of sunspot activity using the Kodaikanal white-light data
Authors: Amareswari, K
Sankarasubramanian, K
Ravindra, B
Issue Date: Feb-2018
Publisher: Cambridge University Press
Citation: Proceedings of the International Astronomical Union, Vol. 340, pp. 173-174
Series/Report no.: International Astronomical Union Symposium;340;
Abstract: Sunspots are the most obvious and high contrast observable feature of solar magnetic activity in the photosphere. The morphological and kinematic behavior of sunspots on the solar surface need to be studied over a long time period to understand solar magnetic activity. For this, it is important to understand the long term emergence patterns, and developments, decay of the sunspots on the solar surface over many cycles. The long time sequence of the Kodaikanal white-light images provide a consistent data set for this study. The digitized images were calibrated for relative plate density and aligned in such a way that the solar north is in upward direction. A sunspot detection technique was used to identify the sunspots on the digitized images. In addition to describing the calibration procedure and availability of the data, we here present results on the sunspot, umbral and penumbral area measurements and their variation with time.
Description: Restricted Access
URI: http://hdl.handle.net/2248/7419
ISBN: 978-1-108-47109-1
ISSN: 1743-9213
???metadata.dc.rights???: © International Astronomical Union
???metadata.dc.relation.uri???: https://doi.org/10.1017/S1743921318001965
Appears in Collections:IIAP Publications

Files in This Item:
File Description SizeFormat 
Century long study of sunspot activity using the Kodaikanal white light data.pdfRestricted Access157.2 kBAdobe PDFView/Open    Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.