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20042015
most citedEvolution of the quasi-periodic oscillation frequency in GRO J1655-40 -- Implications for accretion disk dynamics

102 citations

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astro-ph.SR2010★ 2 cited

Seeing-Induced Errors in Solar Doppler Velocity Measurements

Sreejith Padinhatteeri, R. Sridharan, K. Sankarasubramanian

Imaging systems based on a narrow-band tunable filter are used to obtain Doppler velocity maps of solar features. These velocity maps are created by taking the difference between t…

astro-ph.SR2010★ 20 cited

Local helioseismic and spectroscopic analyses of interactions between acoustic waves and a sunspot

S. P. Rajaguru, R. Wachter, K. Sankarasubramanian +1

Using a high cadence imaging spectropolarimetric observation of a sunspot and its surroundings in magnetically sensitive (FeI 6173 A) and insensitive (FeI 7090 A) upper photospheri…