Physics Colloquium - "Neutrinos Properties from Cosmological Data"

Neutrinos and other light relic particles leave a number of imprints in the cosmic microwave background anisotropies and on maps large-scale structure of the universe. These imprints can not only demonstrate the presence of these particles and constrain their masses, but can provide insight into their nature via signatures of interactions or other behavior that changes during the history of the Universe. I will describe this physics, present constraints on non-standard neutrino self-interactions from cosmic datasets, and discuss prospects for constraining neutrino mass with future cosmic datasets.