We present the Einstein-Maxwell-Klein-Gordon system in hyperboloidal slices, a recent formulation for extracting signals at future null infinity. As far as we know, this is the first time this setup is evolved with a common formulation like BSSN/Z4. Using hyperboloidal slices, contrary to other recent methods like Cauchy-Characteristic Matching, we can continuously reach future null infinity.
We discuss the existence and locations of light rings in the spacetime of a Kerr black hole immersed in a swirling universe– in other words, the immersion of a rotating black hole into a rotating background. As the spin-spin interaction between the black hole and the background breaks the upper-lower hemisphere symmetry, it allows for interesting new features.
We present a general inverse scattering formalism for systems with quasi-zero curvature representations, extending the tools of integrable models to the quasi-integrable setting.
The Event Horizon Telescope (EHT), a consortium including our group member Hector Olivares, has revealed new detailed images of the supermassive black hole at the center of the galaxy M87 — known as M87* — which show a dynamic environment, with changing polarization patterns near the black hole. More: Video explanation, UA online, EHT website.
On September 14, the Fábrica Centro de Ciência Viva de Aveiro hosted a full-day event dedicated to gravitational waves and gravitation, bringing together audiences of all ages to celebrate science, discovery, and knowledge sharing.
Spontaneous scalarization of black holes may be understood in the language of symmetry breaking, with the scalar field condensate serving as order parameter. This motivates the study of theories with more interesting symmetry breaking patterns, i.e. beyond the simplest real scalar case.
As part of the celebrations marking 10 years of gravitational wave observations, the Aveiro outreach centre Fábrica presents the exhibition Traces of Curvature (Traços de curvatura). This artistic retrospective reflects on the scientific work in strong gravity carried out at the University of Aveiro, which now celebrates its 15th anniversary.
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized:
