Welcome, I am Paul Rajaguru. You are visiting my web-pages at the Indian Institute of Astrophysics , where I hold the position of Reader. My research work involves experimental and theoretical studies of the dynamics of solar as well as stellar near-surface magnetic field. The experimental part of my research involves application of two local helioseismic techniques, namely the time-distance and ring diagram analyses, to study the solar active regions dominated by sunspot magnetic fields using data from the Solar Oscillations Investigation / Michelson Doppler Imager (SOI/MDI) on board the Solar and Heliospheric Observatory (SOHO). The theoretical part involves studying the structure and dynamics of small magnetic flux tubes, sunspots and starspots on the solar and stellar photospheres.

• Magnetohydrodynamics (MHD).
  • Solar Magnetic fields, magnetic flux tubes, sunspots.
  • Stellar magnetic flux tubes, starspots.
• Helioseismology.
  • Local helioseismology of active regions.
  • Excitation of oscillations.