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Presented via Zoom, Department of Physics Colloquium - Ralls Lecture

Monday, April 13, 2020 at 4:00pm to 5:00pm

please email Carl Franck at for the Zoom link

General Physics Colloquium and Ralls Lecture, Professor Renée Hložek, University of Toronto

Title:  Constraining axion physics with small-scale CMB measurements

Host:  Mike Niemack

Students and postdocs will have an opportunity for further discussions at 5:20 with Prof. Hlozek.  Just stay on Zoom.

Abstract:  The CMB presents a unique probe of dark matter physics. Ultra-light axions of mass around 10^{-22} eV are a promising dark matter candidate well motivated by high energy physics. The Simons Observatory (SO) is a new cosmic microwave background (CMB) experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands: 27, 39, 93, 145, 225 and 280 GHz. The initial configuration of SO will have three small-aperture 0.5-m telescopes (SATs) and one large-aperture 6-m telescope (LAT), with a total of 60,000 cryogenic bolometers. I will highlight some of the cosmology forecasts for SO science, and focus on the constraints for ultralight axions.

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astronomy, cascal, physics




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Sue Sullivan

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Professor Renée Hložek

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University of Toronto

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