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Aug 20 – 22, 2025
ERC
America/Chicago timezone

On black-hole hair and dark matter environments

Aug 21, 2025, 2:00 PM
30m
401 (ERC)

401

ERC

5640 S. Ellis Ave., Chicago, IL 60637

Speaker

Helvi Witek (University of Illinois)

Description

Black holes are among the most intriguing predictions of general relativity, composed of the fabric of spacetime itself. Observations of black holes offer unique access to extreme gravity, and they enable us to address puzzles in fundamental physics ranging from dark matter to the very nature of gravity itself.

Among the compelling dark matter candidates are ultralight axion-like particles and dark photons. The latter are represented by Proca fields, and I will present new results of Proca hair around black holes. In the second half of the talk, I will present simulations of binary black holes surrounded by a scalar dark matter environment and the resulting gravitational wave signals.

Presentation materials

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