Strong Gravity News & Events

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Light rings and long-lived modes in quasiblack hole spacetimes

Speaker
Minyong Guo (Beijing Normal University)
Event date
Venue
online (only)
Event type

It has been argued that ultracompact objects, which possess light rings but no horizons, may be unstable against gravitational perturbations. In this seminar, I will talk about our recent work on the light rings in quasi- black hole solutions which is a family of horizonless spacetimes whose limit is the extremal Reissner- Nordstr¨om black hole.

Universal relations for rotating Boson Stars

Speaker
Castelo Mourelle Jorge (Universidad de Santiago de Compostela)
Event date
Venue
online (only)
Event type

Boson stars are hypothetical but widely considered exotic compact objects known as ``black-hole mimickers” whose mergers may produce gravitational-wave emissions observable by current ground-based detectors like Advanced LIGO and Virgo.

Alexandre Pombo's Ph.D. exam

Alexandre Pombo successfully defended his Ph.D. thesis, entitled "Black holes and solitonic objects with bosonic fields" on April 8 2022. The Ph.D. committee included Arnaldo Martins (President, UA), Daniela Doneva (Tubingen), Yves Brihaye (Mons), Carolina Benone (UFPA), Pedro Avelino (IA, UP) and Carlos Herdeiro (UA, advisor). The thesis was co-advised by Eugen Radu. Congratulations Alexandre!