45 citations · 58 across the 5 of their papers we have counts for
5 papers
On the Weakening of Chromospheric Magnetic Field in Active Regions
K. Nagaraju, K. Sankarasubramanian, K. E. Rangarajan
Simultaneous measurement of line-of-sight (LOS) magnetic and velocity fields at the photosphere and chromosphere are presented. Fe I line at and at $\lambda6563…
High Resolution Observations using Adaptive Optics: Achievements and Future Needs
K. Sankarasubramanian, T. Rimmele
Over the last few years, several interesting observations were obtained with the help of solar Adaptive Optics (AO). In this paper, few observations made using the solar AO are enl…
Fine Scale Magnetic Fields in and around a Decaying Active Region
K. Sankarasubramanian, H. Hagenaar
High spatial resolution spectro-polarimetric observation of a decaying spot was observed with the Diffraction Limited Spectro-Polarimeter. The spatial resolution achieved was close…
An efficient modulation scheme for dual beam polarimetry
K. Nagaraju, K. B. Ramesh, K. Sankarasubramanian +1
An eight stage balanced modulation scheme for dual beam polarimetry is presented in this paper. The four Stokes parameters are weighted equally in all the eight stages of modulatio…
Radiative transfer effects on Doppler measurements as sources of surface effects in sunspot seismology
S. P. Rajaguru, K. Sankarasubramanian, R. Wachter +1
We show that the use of Doppler shifts of Zeeman sensitive spectral lines to observe wavesn in sunspots is subject to measurement specific phase shifts arising from, (i) altered he…