Strong Gravity News & Events

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Photon rings and shadows of Kerr black holes immersed in a swirling universe

GGD - Gr@V Seminar
Speaker
Rogério Capobianco
Event date
Venue
Online
Event type

We discuss the existence and locations of light rings in the spacetime of a Kerr black hole immersed in a swirling universe– in other words, the immersion of a rotating black hole into a rotating background. As the spin-spin interaction between the black hole and the background breaks the upper-lower hemisphere symmetry, it allows for interesting new features.

Quasi-integrability in classical field theories

GGD - Gr@V Seminar
Speaker
Paulo E. G. Assis (Universidade Federal de Catalão)
Event date
Venue
Hybrid: Sala Sousa Pinto and Teams
Event type

We present a general inverse scattering formalism for systems with quasi-zero curvature representations, extending the tools of integrable models to the quasi-integrable setting.

Black hole scalarization with spontaneous symmetry breaking

GGD - Gr@V Seminar
Speaker
Sebastian Garcia-Saenz (Southern University of Science and Technology (SUSTech))
Event date
Venue
Online (Teams)
Event type

Spontaneous scalarization of black holes may be understood in the language of symmetry breaking, with the scalar field condensate serving as order parameter. This motivates the study of theories with more interesting symmetry breaking patterns, i.e. beyond the simplest real scalar case.