Speaker: Dr Simon Foreman
Affiliation: Arizona State University (USA)
Abstract
Our knowledge of the universe has grown by leaps and bounds over the last several decades, but many fundamental questions remain unanswered, from the behavior of the very early universe to the identities of dark matter and dark energy. Proposed solutions to these open problems can be tested via their impact on the large-scale distribution of matter in the universe. In this talk, I will discuss 21cm intensity mapping, a technique for mapping this distribution by measuring radiation from spin-flip transitions in distant clouds of neutral hydrogen. In particular, I will discuss recent cosmology results from the CHIME telescope (which was custom-bult for intensity mapping), along with progress toward the next generation of measurements and new tools for interpreting these measurements. Collectively, these developments will set the stage for 21cm intensity mapping to provide exciting information about cosmology in the years to come.
About Physics colloquium
The Physics Colloquium series hosts a range of speakers from Australia and abroad. The series explores a variety of topics and everyone is welcome to come along. The seminars are open so there is no need to register your attendance.