Galaxies in the Axiverse
Speaker
Date
Time
Place
Cosmology Hall (Room 7S1)
Abstract
Ultra-light bosons are well-motivated dark matter candidates with interesting phenomenology on galactic scales. In particular, wavelike behaviour of dark matter in the so-called "fuzzy" regime can help relieve potential problems for standard cold dark matter in galaxies, by producing central cores and suppressing the abundance of low-mass satellites. I will describe observational signatures of this wavelike behaviour, and will show how the smallest galaxies severely constrain ultra-light dark matter particle masses.
Biography
Neal Dalal is a leading cosmologist based at the Perimeter Institute for Theoretical Physics. He is widely known for his influential work on primordial non-Gaussianity and its observational signatures in galaxy clustering, as well as for contributions to understanding dark matter phenomenology and cosmological probes of fundamental physics.