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Pavlidou

Astronomy Colloquium - "A New Probe of Dark Energy"

Event Type
Seminar/Symposium
Sponsor
Department of Astronomy
Location
https://go.illinois.edu/AstronomyColloquiumVirtualLink
Virtual
wifi event
Date
Nov 16, 2021   3:45 pm  
Speaker
Dr. Vasiliki Pavlidou, University of Crete
Contact
Rebecca Bare
E-Mail
rsbare@illinois.edu
Phone
217-265-8226
Views
25
Originating Calendar
Astronomy Colloquium Speaker Calendar

In the currently favored cosmological model, the energy density of the Universe is dominated by a field of unknown nature - dark energy -  acting anti-gravitationally. All our current evidence for the existence of dark energy, whether in the form of a cosmological constant or an evolving field, is indirect and global (based on the effect of dark energy on the Universe as a whole). I will discuss a novel path towards probing dark energy, using galaxy clusters on their largest non-expanding scales. I will show how measurements of the mass enclosed by the boundary between galaxy clusters and the expanding Universe can directly and uniquely probe dark energy locally: on scales much smaller than the observable Universe, and at the present cosmic time.

 

Topic: Astronomy Department Colloquium
Time: This is a recurring meeting Meet anytime

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