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M.Sc. thesis defense of Zeus Sales Moreira

Zeus Sales Moreira a student from Universidade Federal do Pará, Brazil, successfully defended his M.Sc. thesis entitled “Black hole spacetimes: radiation emission and light rings” on July 29th. The thesis was advised by C. Herdeiro and L. Crispino and the examiners were E. Radu and G. Olmo (U. Valencia). Congratulations Zeus!

New members and grants

Guilherme Raposo (left, Ph.D. from Rome, La Sapienza, 2021) joined our group in a partnership with IST-Lisbon from July 2021. Welcome Guilherme! João Novo (middle) and João Pino (right) were awarded individual FCT PhD scholarships in the 2021 call. Congratulations to both!

The Black Hole Photon Ring

Speaker
Alex Lupsasca (Princeton University)
Event date
Venue
online (only)
Event type

The photon ring is a narrow ring-shaped feature, predicted by General Relativity but not yet observed, that appears on images of sources near a black hole. It is caused by extreme bending of light within a few Schwarzschild radii of the event horizon and provides a direct probe of the unstable bound photon orbits of the Kerr geometry.