Physics Colloquium: Neelima Sehgal, Mapping Dark Matter on Large and Small Scales with the Cosmic Microwave Background
Physics and Astronomy Department,
Stony Brook University, Stony Brook, NY
Mapping Dark Matter on Large and Small Scales with the Cosmic Microwave Background
In this talk I will discuss the next frontier of research on the Cosmic Microwave Background (CMB): precisely measuring the gravitational lensing of the CMB. This CMB lensing signal encodes a wealth of statistical information about the distribution of matter in the Universe, which is sensitive to the total mass of the neutrinos and the particle properties of dark matter. I will discuss upcoming results using data from the Atacama Cosmology Telescope, and forecasts for the near-future Simons Observatory and CMB-S4 experiments. I will also discuss a novel and powerful way to probe dark matter particle properties using very high resolution CMB lensing measurements, and a new experiment being developed, called CMB-HD, that can achieve this science.