Research

Extensive study on Inderstanding the complex structure of atmospheric helium around close-In exoplanets
(e.g., WASP-107b; Krishnamurthy et al. 2025).

We are looking at closely-packed multi-planet systems to determine the mass of the planets through Transit Timing Variations (TTVs). We are using local facilities like Mont-Mégantic Observatory (OMM) and archival K2 and TESS datasets for our analysis. 

We have observed planets in and around the Radius Gap (Fulton et al. 2017) . Especially the we looked at GJ 9827 b and d (Krishnamurthy et al. 2023) and the key-stone super-Earth TOI-1235 b (Krishnamurthy et al. 2023). 

Young planets are excellent test-beds for constrianing the primordial atmosphere. We have observed planets like AU Mic b (Hirano, T., Krishnamurthy, V., et al 2020) in transit for constraining the primordial atmosphere. Figure on the left shows the increased activity during the transit observation.

The infamous TRAPPIST-1 system has 7 Earth-sized planets in close-in orbit around a M8 star. We confirmed that the planets do not have H/He-rich atmosphere (Krishnamurthy et al. 2021). We are currently constraining the secondary atmosphere of this system.