C. Ragoonatha Charry, the First Assistant at Madras Observatory from 1864 to 1880, was not only a noted Indian observational astronomer but also someone who emphasized the need for incorporating modern observationally-based ...

We have made number counts of the bright points that populate the interior of the Ca II network in the solar chromosphere for four solar cycles. We find that the number of these fine structures during the solar maximum ...

The Changes in the Ca II K line profile of the F0 supergiant Canopus have been studied from the high dispersion coude spectrograms obtained since 1975. The emission in the core of the line is variable in a timescale of few ...

The Sun's polar magnetic field is pivotal in understanding solar dynamo processes and forecasting future solar cycles. However, direct measurements of the polar field have only been available since the 1970s. The chromospheric ...

CCD spectra of the infrared triplet lines of ionized calcium at 8498, 8542, 8662 have been obtained at a spectral resolution of 0.4 Å in 146 stars brighter than V = +7.0 spanning a range in spectral types from F7 to M4 of ...

The P,T -odd interaction constant, WS , for the ground state of YbF and BaF molecules are calculated using the second-order many-body perturbation theory (MBPT) via Z -vector technique. The interaction constant WS reported ...

The Rig Veda described both a solar and a luni-solar calendrical scheme. Once the precision of Rig Vedic astronomy is recognized, the Great Cosmis Cycles of ancient India can be interpreted meaningfully.