TBA
Speaker
Claudio Lazarte
Event date
Venue
TBA
Event Website
Event type
Strong Gravity
The group's research on strong gravity involves finding analytical and numerical solutions of Einstein's theory of general relativity, and many of its extensions, either in vacuum or coupled to various types of matter. For our latest developments/activities in this area, please see the listing at the end of this article.
The prime examples of (relativistic) strong gravitational systems are Black Holes. They are truly unifying objects of all physics. The understanding of their formation and dynamics requires the laws of all four fundamental forces, and their physics is relevant not only for astrophysics and cosmology but for a variety of topics within high energy physics.
See here a movie made by the COST action `Black holes in a violent universe', in which our group participates, for a visual overview of different types of black holes.
Latest Strong Gravity Publications
Spontaneous spherical symmetry breaking of black holes with resonant hair, J. Ferreira, C. A. R. Herdeiro, E. Radu, M. Zilhão; arXiv:2604.22437 [gr-qc].
Publication type
Regular Articles
Detection of a second jet within the nuclear core of Mrk 501, S. Britzen, H. Olivares, Gopal-Krishna, F. Jaron, I. N. Pashchenko, E. Kun, F. K. Schinzel, J. Becerra González, D. Paneque, N. R. MacDonald; Monthly Notices of the Royal Astronomical Society (2026) stag291.
Publication type
Regular Articles
Phase Structure of Scalarized Black Holes in Einstein-Scalar-Gauss-Bonnet Gravity, C. Herdeiro, H. Huang, J. Kunz, M. Lai, E. Radu, D. Zou; arXiv:2603.24164 [gr-qc].
Publication type
Regular Articles
The two shadows of a single black hole: Vacuum birefringence phenomena within Einstein-Nonlinear-Electrodynamics, M. A. A. de Paula, H. C. D. Lima, P. V. P. Cunha, C. A. R. Herdeiro, L. C. B. Crispino; arXiv:2603.17007 [gr-qc]
Publication type
Regular Articles
The imitation game (r)evolutions: Q-star effective shadow from GRMHD analysis, V. Jaramillo, L. Meneses, H. R. Olivares Sánchez, C. Herdeiro, D. Núñez, Shuang-Yong Zhou; arXiv:2603.16995 [gr-qc]
Publication type
Regular Articles
Latest Strong Gravity News & Events
Accretion beyond the black hole paradigm: a light from within the shadow
Speaker
Maciek Wielgus (Instituto de Astrofísica de Andalucía - CSIC)
Event date
Venue
Hybrid: Sala 11.2.21 and Teams
Event Website
Event type
I will discuss the first 3D-general relativistic magnetohydrodynamic (GRMHD) simulation of sustained accretion onto a horizonless singularity in which matter falls onto the central object rather than being accumulated outside of it or expelled in outflows.
On the Thermodynamics of Deformed Black Holes
Speaker
Maryem Jemri (Mohammed V University of Rabat, Morocco)
Event date
Venue
Hybrid: Sala 11.2.21 and Teams
Event Website
Event type
Inspired by noncommutative geometry in string theory, we introduce extended derivatives in black hole physics by incorporating a real antisymmetric rank-2 tensor, exhibiting similarities with certain string-theoretic fields.
Event horizon termination and the emergence of Lorentz signature
Speaker
Justin Feng (CEICO, FZU - Institute of Physics of the Czech Academy of Sciences)
Event date
Venue
Hybrid: Sala Sousa Pinto and Teams
Event Website
Event type
In this talk, I describe in detail how one might understand the termination of the event horizon of a black hole in terms of of quasiregular singularity characterized by points possessing two future-directed light cones and two past-directed light cones (in fact this spacetime is conformal to a region of the 1+1 trousers spacetime).
Visits Yasha Shnir and Mario Navarro
Gr@v is hosting the visits of Yasha Shnir, long time group collaborator, under an FCT mobility grant, and Mario Luciano Navarro, Ph.D. student from Valencia in the spring 2026. In the photo Yasha and Mario enjoy a bit of sunshine after the weekly group lunch.