24 citations · 26 across the 4 of their papers we have counts for
5 papers
Chromospheric resonances above sunspots and potential seismological applications
T. Felipe, C. Kuckein, S. J. González Manrique +2
Oscillations in sunspot umbrae exhibit remarkable differences between the photosphere and chromosphere. We evaluate two competing scenarios proposed for explaining those observatio…
Numerical determination of the cutoff frequency in solar models
T. Felipe, C. R. Sangeetha
In stratified atmospheres, acoustic waves can only propagate if their frequency is above the cutoff value. Different theories provide different cutoff values. We developed an alter…
Signatures of Untwisting Magnetic Field in a Small Emerging Bipole in the Solar Photosphere
C. R. Sangeetha, Durgesh Tripathi, S. P. Rajaguru
We perform a study of fluid motions and its temporal evolution in and around a small bipolar emerging flux region using observations made by the Helioseismic and Magnetic Imager (H…
Magnetic fields and low-frequency acoustic wave-energy supply to the solar chromosphere
S. P. Rajaguru, C. R. Sangeetha, Durgesh Tripathi
The problem of solar chromospheric heating remains a challenging one with wider implications for stellar physics. Several studies in the recent past have shown that small-scale inc…
Relationships between fluid vorticity, kinetic helicity and magnetic field at the small-scale (quiet-network) on the Sun
C. R. Sangeetha, S. P. Rajaguru
We derive horizontal fluid motions on the solar surface over large areas covering the quiet-Sun magnetic network from local correlation tracking of convective granules imaged in co…