| Abstract * |
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In this work, we utilize century-long (1921-2011) Kodaikanal White light digitized data to track the Sunspots and infer the Solar differential rotation. We use this historical data to understand the variation in Solar differential rotation with time, phases and strength of the solar cycle. To measure the differential rotation, we keep track of individual Sunspots in consecutive images. To do so, we use automatic image correlation technique. Our preliminary results have shown that the differential rotation negatively correlates with cycle strength, and it also depends upon the phase of the cycle. Apart from these results, our analysis also reveals that the smaller Sunspots give faster rotation rate than the larger one. These results will provide a more in-depth insight into the understanding of Sunspot formation. Later on, we have implemented our method on space-based data, which not only confirms our findings but also gives better confidence in our approach.
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