Strong Gravity News & Events

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Quantum fermion superradiance in charged black holes

GGD - Gr@V Seminar
Speaker
Álvaro Álvarez-Domínguez (Universidad Complutense de Madrid & IPARCOS)
Event date
Venue
Hybrid: room 11.2.23 and Zoom
Event type
In contrast to a classical charged bosonic field, a classical charged fermionic field does not exhibit superradiant scattering when placed in the background of a static charged black hole. However, we show that a quantum version of this effect does occur.

Stability of Boson Stars as Black Hole Mimickers

GGD - Gr@V Seminar
Speaker
Gareth Marks (University of Cambridge, Department of Applied Mathematics and Theoretical Physics)
Event date
Venue
Hybrid: room 11.2.25 and Zoom
Event type

We discuss recent results on using boson stars with a solitonic potential as models of ultracompact objects, which could mimic black holes in such phenomenology as VLBI images and gravitational wave signals.

Towards a non-singular paradigm for black hole physics

GGD - Gr@V Seminar
Speaker
Francesco Di Filippo (Goethe University Frankfurt)
Event date
Venue
Hybrid: room 11.2.21 and Zoom
Event type

The study of regular black holes and black hole mimickers as alternatives to standard black holes has recently gained significant attention, driven both by the need to extend general relativity to describe black hole interiors, and by recent advances in observational technologies.

Gonçalo Gonçalves

Full Name: Goncalo Filipe Mota GoncalvesGonçalo Gonçalves
 

Postion: PhD Student
 

Degrees: Msc in Theoretical Physics, Faculty of Sciences of the University of Porto, 2024; BSC in Physics, Faculty of Sciences of the University of Coimbra, 2021
 

Visual Signatures of Scalar Hair in the Images of Accretion Disks and Shadows of Rotating Hairy Black Holes

GGD - Gr@V Seminar
Speaker
Galin Gyulchev (Sofia University “St. Kliment Ohridski”)
Event date
Venue
Hybrid: room 10.3.7 (DEGEIT) and Zoom
Event type

We examine the images and shadows of thin accretion disks around rotating hairy black holes characterized by two non-trivial, time-periodic scalar fields, whose target space possesses non-flat Gaussian curvature.