Oleg Tsupko joins Gr@v
Oleg Tsupko, an expert in several strong gravity topics including lensing and black hole shadows, joins Gr@v as a CEEC researcher from April 2026. Welcome Oleg!
Strong Gravity News & Events
Seminars in Prague
The Gr@v coordinator, C. Herdeiro, visited Prague to deliver two seminars, at CEICO and Charles University. The visit provided a great opportunity to reconnect with friends and colleagues in a city rich in scientific and cultural heritage - home to figures such as Kepler, Tycho Brahe, Einstein, Doppler, Mach, Bolzano, and Kafka. Many thanks to both groups for their kind hospitality and for making this visit possible.
Discussion of the paper "Nonlinear Stability of Black Holes with a Stable Light Ring", by Guangzhou Guo et al.
Speaker
Chen Liang (U. Aveiro)
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Hybrid: Room Sousa Pinto and Microsoft Teams
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Discussion of the paper "Hyperbolicity analysis of the linearised 3+1 formulation in the Teleparallel Equivalent of General Relativity", by Cheng Cheng and Maria Jose Guzman
Speaker
Héctor Olivares (U. Aveiro)
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Venue
Hybrid: Room 11.2.22 and Microsoft Teams
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Discussion of the paper "Image of Kerr-Melvin black hole with thin accretion disk", by Yehui Hou al.
Speaker
Jianzhi Yang (U. Aveiro)
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Hybrid: Room Sousa Pinto and Microsoft Teams
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Discussion of the paper "Properties of general stationary axisymmetric spacetimes: circularity and beyond", by Eugeny Babichev and Jacopo Mazza
Speaker
Etevaldo Costa Filho (U. Aveiro)
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Hybrid: Room Sousa Pinto and Microsoft Teams
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Discussion of the paper "Dephasing in binary black hole mergers surrounded by scalar wave dark matter clouds", by Cheng-Hsin Cheng al.
Speaker
José Ferreira (U. Aveiro)
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Hybrid: Room Sousa Pinto and Microsoft Teams
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Event horizon termination and the emergence of Lorentz signature
Speaker
Justin Feng (CEICO, FZU - Institute of Physics of the Czech Academy of Sciences)
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Hybrid: Sala Sousa Pinto and Teams
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Abstract: TBD.
Equilibrium Magnetized Accretion Discs around Hairy Black Holes
Speaker
Juan José Zaldívar Vázquez (Instituto Nacional de Astrofísica, Óptica y Electrónica, INAOE)
Event date
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Hybrid: Sala 11.2.21 and Teams
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Equilibrium accretion tori are used as initial conditions for GRMHD simulations to study accretion onto compact objects. In this talk, I present the construction of magnetized Komissarov-type discs within hairy black hole spacetimes. I show that equilibrium configurations can be consistently obtained in these backgrounds, as in the standard Kerr case.
The evolution of black hole interiors in classical and semiclassical gravity
Speaker
Valentin Boyanov (CENTRA, Instituto Superior Técnico, Universidade de Lisboa)
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Hybrid: Sala Sousa Pinto and Teams
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In this talk I will present some results regarding the evolution of black holes which possess inner horizons. I will begin by giving an overview of the dynamical formation of such black holes, and the characteristics of their evolution, in contrast to maximally extended solutions.