My research interests lie in understanding the evolution of the Universe as we know it, specifically the later part when structures like galaxies and clusters formed, and eventually the epoch we are living in today, where we witness an accelerated expansion of the Universe.
During my PhD, I was engaged in understanding cosmological observables and their various contributing factors. Some questions I attempted to address were:
How do we obtain a full-sky description of cosmological observables?
How does weak gravitational lensing affect observables like galaxy number counts?
How can we test gravity on cosmological scales, and make sure we work with actual observables?
How can we model the observables on smaller non-linear scales?
Are the cosmological observables conformal frame-invariant?
How do local astrophysical effects like intrinsic alignments contribute to the measurements?
I am currently interested in various areas of Cosmology, some in the areas I have already worked on, and some new ones. Topics I have worked on of late are as follows:
What happens to cosmological observables when we perform a disformal transformation?
What is the effect of higher-order contributions (flexions) from gravitational tidal shear, to weak lensing signals?
Can the well-established distance-duality relation be violated in case of lensing in non-metric spacetimes and intrinsic alignments?
Can we have a unified linear alignment model for both elliptical and spiral galaxies?
How can dynamical dark energy models in the light of modified gravity theories help resolve the Hubble tension?
Some questions that I would like to address in the near future:
Can we have a combination of early and late-time models that can prove to be better alleviators of the Hubble tension?
How viable will they be for the S8 tension?
How can our linear alignment model help to test gravity?