Beyond LCDM Constraints with Kinetic Sunyaev Zel'dovich Velocity ReconstructionConfirmed

by Jordan Krywonos (Perimeter Institute)

Monday Apr 28, 2025, 2:00 p.m. → 2:30 p.m. America/Toronto

PI/4-400 - Space Room (Perimeter Institute for Theoretical Physics)

The kinetic Sunyaev-Zel’dovich (kSZ) effect arises from the scattering of cosmic microwave background (CMB) photons off free electrons in bulk motion. In this talk, I will introduce the kSZ effect and the technique of kSZ velocity reconstruction, which allows us to map the large-scale velocity field of the universe. I will highlight some of the intriguing aspects of this observable, such as its ability to probe our past light cone. I will then discuss how kSZ velocity reconstruction can be used to test beyond-ΛCDM models, including large-scale voids, the intrinsic CMB dipole, and local-type primordial non-Gaussianity. (Hopefully this talk will be understandable for folks not in cosmology!)