Research
Ongoing
Late-time non-linear signatures of relic Neutrinos
Our code Cheetah an efficient N-1-body numerical framework to evaluate neutrino halo overdensities around spherical DM halos, producing results within seconds. The code’s efficient parallelization enables rapid scans of cosmological and DM parameters while easily incorporating new physics like altered neutrino distributions, making it highly effective for probing late-time neutrino effects like gravitational-lensing effects on CMB fluctuations. https://arxiv.org/abs/2410.08267
JWST gravitationally lensed galaxies during the EoR
We explored high-redshift galaxies with redshifts ranging from 6 to 10 using JWST observations of the galaxy cluster MACS0647. The cluster gravitationally lenses the surrounding field, enabling detailed exploration of the first galaxies formed during the Epoch of Reionization, with our spectra revealing insights into their metallicities, star formation rates, and dust.
Early universe signatures on 21cm emission
This project explores the imprints of early universe physics on 21 cm observables during Cosmic Dawn using Zeus21, which effectively captures the nonlinear dynamics of cosmic dawn. We investigate how these influences manifest in the resulting 21-cm signal, providing insights into cosmic reionization and structure formation.
Past
CMB foreground constraints with ACT Y-maps
Postbaccalaureate research. We evaluated CMB data from Planck and ACT to constrain dust foregrounds by cross-correlating the Cosmic Infrared Background (CIB) with the thermal Sunyaev-Zeldovich (tSZ) effect. By leveraging high-resolution Y-maps from ACT alongside the local dust mapping properties of 21 cm HI maps, we improved CIB and dust contamination models for future CMB missions.
Constraining dark energy EoS through ISW-tSZ cross correlations
In this summer project, we harnessed the Integrated Sachs-Wolfe (ISW) and thermal Sunyaev-Zeldovich (tSZ) effects to constrain the Dark Energy Equation of State. By conducting cross correlations in the largest galaxy clusters observed through ACT and Planck, we sought to enhance our understanding of dark energy's role in the dynamics of cosmological expansion.
Image Credits
JWST lensing map: Meena et al. 2023
ACT Y-map: Coulton et al. 2023
ISW effect: Szapudi