An accurate understanding of the internal structure and evolution of stars is of paramount importance to modern astrophysics, and physics in general. Stars serve as an excellent laboratory to test our understanding of basic physics in extreme conditions, and their observations provide invaluable inputs for exoplanetary science and Galactic studies.
My main research interests are asteroseismology and stellar modelling. Asteroseismology is the study of oscillations in stars. Recent measurements of the surface brightness variations of stars by the French-led CoRoT space telescope and the NASA Kepler/K2 and TESS satellites allow precision determination of their oscillation frequencies. Since different oscillation modes are sensitive to different regions within star, contemporary measurements of several tens of oscillation frequencies enable us to study stellar interior similar to helioseismology which allowed investigation of solar interior. Furthermore, such measurement of oscillation frequencies together with stellar models allows precision determination of the mass, radius and age of stars.
My research also focuses on Galactic archaeology. The chemical compositions of stars contain information about the gas from which they formed, hence measured stellar elemental abundances together with seismically inferred stellar ages can be used for Galactic archaeology similar to Geoarchaeology. The measurements of stellar elemental abundances from the APOGEE survey, the availability of 6D phase space information from Gaia mission, and the inferences of stellar ages provide unprecedented constraints on the Galactic chemical evolution models and cosmological zoom-in simulations.
2006 - 2009 Bachelor of Science
University of Allahabad
2009 - 2011 Master of Science
Jawaharlal Nehru University
New Delhi, India
2011 - 2016 Doctor of Philosophy
Tata Institute of Fundamental Research