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

Lensing and shadow of a black hole surrounded by a heavy accretion disk, P. V. P. Cunha, N. A. Eiró, C. A. R. Herdeiro and J. P. S. Lemos; arXiv:1912.08833 [gr-qc].

Publication type
Regular Articles
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Dynamically and thermodynamically stable black holes in Einstein-Maxwell-dilaton gravity, D. Astefanesei, J. L. Blázquez-Salcedo, C. Herdeiro, E. Radu and N. Sanchis-Gual; arXiv:1912.02192 [gr-qc].

Publication type
Regular Articles
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Charged Dirac perturbations on Reissner-Nordstrom-Anti-de-Sitter spacetimes: quasinormal modes and Robin boundary conditions, M. Wang, C. Herdeiro and J. Jing; Physical Review D 100 (2019) 124062, arXiv:1910.14305 [gr-qc].

Publication type
Regular Articles
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A class of solitons in Maxwell-scalar and Einstein-Maxwell-scalar models, C. A. R. Herdeiro, J. M. S. Oliveira and E. Radu; Eur. Phys. J C80 (2020) 23, arXiv:1910.11021 [gr-qc].

Publication type
Regular Articles
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Black hole spontaneous scalarisation with a positive cosmological constant, Y. Brihaye, C. Herdeiro and E. Radu, Accepted in Phys. Lett. B (2020), arXiv:1910.05286 [gr-qc].

Publication type
Regular Articles
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Latest Strong Gravity News & Events

Quasinormal modes of neutron stars in R^2 gravity

Speaker
Jose Blázquez-Salcedo (Oldenburg U., Germany)
Event date
Venue
Maths. Dept. Room 11.3.21
Event type
In this talk we will discuss the quasinormal modes of neutron stars in modified theories of gravity, in particular, in R^2 gravity. In this model, in addition to the space-time and fluid degrees of freedom that are present in General Relativity, we naturally find a (massive) scalar field.

Black hole thermodynamics - Lecture 2

Speaker
Eugen Radu
Event date
Venue
Venue Maths. Dept. Room Sousa Pinto
Event type

This is the second of a mini-course (four lectures) on black hole thermodynamics. The lectures will be on January 16, 24, 31 and February 7.