Research
Compact Hierarchical Triples (CHT) are systems with the tertiary star orbiting the inner binary in an orbit shorter than 1000 days. CHT with an eclipsing binary as its inner binary can help us extract the orbital, stellar and atmospheric properties of all the stars in the system. Using these parameters, I constrain the evolution of these stars and also check their future dynamical evolution.
Asteroseismology or study of stellar pulsations can help us learn a lot about the interiors of stars. If we use binary stars to extract masses and radii of the stars, asteroseismology can be the most powerful tool for stellar characterization.
Detached eclipsing binaries
Detached Eclipsing Binaries (DEBs) are the source of the most accurate stellar parameters (e.g., mass, radius) . Using light curve (LC) modeling, Eclipse Timing Variations (ETV), spectral analysis (on disentangled spectra), and radial velocities (RVs), we can obtain the orbits, geometry, stellar parameters, metallicity, age, and evolutionary status of stars in such DEBs.
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UV bright stars in globular clusters
The Galactic Globular Clusters (GGCs) present in the galactic halo are old and metal-poor. This has lead to hotter populations of stars being present in these GGCs. These hot stars are bright in UV and belong to the evolved stages of stellar evolution, i.e, Horizontal Branch (HB), Asymptotic Giant Branch (AGB) and Blue Straggler Stars (BSS). For this work, that started during my Masters, we use observations from the Ultraviolet Imaging Telescope (UVIT) which is onboard the space-observatory ASTROSAT and is operated by the Indian Space Research Organisation.
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