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

Eccentric mergers of binary Proca stars, G. Palloni, N. Sanchis-Gual, J. A. Font, C. Herdeiro, E. Radu; arXiv:2504.10235 [gr-qc].

Publication type
Regular Articles
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Observing boson stars in binary systems: The case of Gaia BH1, P. Passos, H. R. Olivares-Sánchez, J. A. Font, A. Onofre; arXiv:2504.09521 [astro-ph.HE].

Publication type
Regular Articles
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Proto-neutron star oscillations including accretion flows, D. Tseneklidou, R. Luna, P. Cerdá-Durán, A. Torres-Forné; arXiv:2503.16317 [astro-ph.HE].

Publication type
Regular Articles
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Gregory-Laflamme-type instability of boson strings and related phases in D=5 Kaluza-Klein theory, C. A. R. Herdeiro, E. Radu; arXiv:2503.15069 [gr-qc].

Publication type
Regular Articles
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Backreaction of perturbations around a stable Light Ring, P.V.P. Cunha; arXiv:2503.00117 [gr-qc]

Publication type
Regular Articles
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See Strong Gravity publications

Latest Strong Gravity News & Events

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 Website
https://videoconf-colibri.zoom.us/j/95541308539?pwd=GXnfP6VYVU82NHwP3ZEevFxw3si…
Event type
Seminars

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.

Strong Gravity

ROXAS: a spectral code for isolated neutron stars oscillations

GGD - Gr@V Seminar
Speaker
Gaël Servignat (Laboratoire Astroparticule et Cosmologie)
Event date
Venue
Hybrid: room 11.2.21 and Zoom
Event Website
https://videoconf-colibri.zoom.us/j/95541308539?pwd=GXnfP6VYVU82NHwP3ZEevFxw3si…
Event type
Seminars
Relativistic hydrodynamics has undergone major development over the past three decades, notably through high-resolution shock-capturing schemes enabled by conservative formulations of the relativistic fluid equations.
Strong Gravity
Astrophysics

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 Website
https://videoconf-colibri.zoom.us/j/95541308539?pwd=GXnfP6VYVU82NHwP3ZEevFxw3si…
Event type
Seminars

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.

Strong Gravity
Astrophysics

Turbulence in Magnetised Neutron Stars

GGD - Gr@V Seminar
Speaker
William Cook (Theoretical Physics Institute, Friedrich-Schiller University Jena)
Event date
Venue
Hybrid: room 11.2.25 and Zoom
Event Website
https://videoconf-colibri.zoom.us/j/95541308539?pwd=GXnfP6VYVU82NHwP3ZEevFxw3si…
Event type
Seminars

The magnetic field configuration in the interior of Neutron Stars is an open problem and may be impacted by the influence of a turbulent cascade within the star. Assessing the impact of turbulent flow with numerical simulations requires incredibly high resolution as well as long lived simulations covering multiple Alfven times.

Strong Gravity
Astrophysics

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
 

Strong Gravity
Astrophysics
See Strong Gravity News & Events