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High Energy Physics Seminar

Monday, November 9, 2020
4:00pm to 5:00pm
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Online Event
Probing Dark Matter substructure with astrometric weak lensing
Cristina Mondino, Perimeter Institute,

Low-mass structures of dark matter (DM) are expected to be entirely devoid of light-emitting regions and baryons. Precisely because of this lack of baryonic feedback, small-scale substructures of the Milky Way are a relatively pristine testing ground for discovering aspects of DM microphysics and primordial fluctuations on subgalactic scales. I will present results from the first search for Galactic DM subhalos with time-domain astrometric weak gravitational lensing. The analysis is based on a matched-filter template of local lensing corrections to the proper motion of stars in the Magellanic Clouds and is most sensitive to compact DM structures of ten million to a hundred million solar mass.

Meeting ID: 853 4313 0214
Passcode: 474141