Project Grant 2206088

This three-year, four hundred twenty-six thousand seven hundred forty-eight dollar Project Grant from the National Science Foundation Division of Astronomical Sciences will fund research at Cornell University to combine measurements from cosmic microwave background experiments and galaxy clustering surveys to probe the nature of gravity, dark matter, and neutrinos in the universe. Key products will include the highest signal-to-noise pairwise kinematic Sunyaev-Zeldovich measurements to date using final maps from the Atacama Cosmology Telescope combined with year one data from the Dark Energy Spectroscopic Instrument. Researchers will also use simulations to model effects on the pairwise kinematic Sunyaev-Zeldovich signal and void redshift space distortion profiles under various modified gravity and massive neutrino cosmologies. Theoretical work will investigate combining weak lensing data from the Vera C. Rubin Observatory Legacy Survey of Space and Time and/or cosmic microwave background lensing with redshift space distortion measurements to reveal signatures of the dark sector in voids. This work supports the NSF Mathematical and Physical Sciences program's goal of advancing the mathematical and physical sciences.