42 citations · 186 across the 14 of their papers we have counts for
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Magnetic imprints of eruptive and non-eruptive Solar flares as observed by Solar Dynamics Observatory
N. Vasantharaju, P. Vemareddy, B. Ravindra +1
The abrupt and permanent changes of photospheric magnetic field in the localized regions of active regions during solar flares called magnetic imprints (MIs), have been observed fo…
Solar-Cycle Characteristics in Kodaikanal Sunspot Area: North--South Asymmetry, Phase Distribution and Gnevyshev Gap
B. Ravindra, Partha Chowdhury, J. Javaraiah
The solar activity is asymmetric in both hemispheres in almost all cycles. This asymmetry is observed both in cycle amplitude and period. We have used about 90~years of sunspot-are…
Determining the Variations of Ca-K index and Features using a Century Long Equal Contrast Images from Kodaikanal Observatory
Jagdev Singh, Muthu Priyal, B. Ravindra
In the earlier analysis of Ca-K spectroheliograms obtained at Kodaikanal Observatory, the "Good" images were used to investigate variations in the chromosphere. Still, the contrast…
Sunspot Drawings at Kodaikanal Observatory: A Representative Results on Hemispheric Sunspot Numbers and Area Measurements
Ravindra B., Kumaravel Pichamani, Selvendran R. +4
The importance of the periodicity in sunspot appearance was well recognized by the mid of 19th century. Several observatories around the globe have made the record of sunspots in t…
Finding the critical decay index in solar prominence eruptions
N. Vasantharaju, P. Vemareddy, B. Ravindra +1
The background field is assumed to play prime role in the erupting structures like prominences. In the flux rope models, the critical decay index () is a measure of the rate a…
Formation and eruption of sigmoidal structure from a weak field region of NOAA 11942
N. Vasantharaju, P. Vemareddy, B. Ravindra +1
Using observations from Solar Dynamics Observatory, we studied an interesting example of a sigmoid formation and eruption from small-scale flux canceling regions of active region (…