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

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
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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
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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
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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
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Gravitational waves from warm inflation in the weak dissipative regime, O. Luongo, T. Mengoni, P. M. Sá; arXiv:2603.07662 [gr-qc]

Publication type
Regular Articles
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Latest Strong Gravity News & Events

Accretion beyond the black hole paradigm: a light from within the shadow

GGD - Gr@V Seminar
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.

Event horizon termination and the emergence of Lorentz signature

GGD - Gr@V Seminar
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).