In this seminar I will introduce a rigorous and general framework to study systematically self-gravitating elastic materials within general relativity. The formulation that will be presented in this seminar is particularly suitable to investigate the existence and viability, including radial stability, of spherically symmetric elastic stars.
In this talk, we consider a scenario in which an extended reheating scenario can be described analogously to the so-called scalar field dark matter model.
Gr@v member C. Herdeiro was one of the invited speakers of "Física 2022" the 23rd national conference of the Portuguese Physics Society, delivering the talk "Buracos Negros: de uma equação ao Nobel" (photo courtesy of A. Folhas).
A group of Gr@v members, including J. Delgado, A. Pombo, J. Novo, N. Santos and I. Sengo, represented the group at the 2022 Spanish-Portuguese relativity meeting, in Salamanca, delivering talks on their latest work. Former member J. Oliveira, also joined them for the group photo!
A new staff exchange network - NewFunFiCO - was chosen for funding within the Horizon-MSCA-2021-SE-01 call. The network has nodes at Aveiro University (Portugal, coordinator), University of Valencia (Spain), Johann Wolfgang Goethe-Universitaet Frankfurt Am Main (Germany), Universidad Nacional Autonoma de Mexico (Mexico), Universidade Federal do Pará (Brazil) and the Chinese University of Hong Kong (China). The network will start on January 1st 2023 and have a lifetime of 4 years.
Our group is co-organizing the VIII Amazonian Workshop on Gravity and Analogue Models, to be held in Belém, Brazil, from 21-25 November 2022. This meeting is also promoted by the FunFiCO network, for which U. Federal do Pará, in Belém, is one of the nodes, coordinated by Prof. Luis Carlos Crispino.
Gravitational wave detections, images of black hole shadows, and other impressive developments in observational astronomy allow us to study strong gravity systems in a completely new way. Being immersed in the universe, these systems are surrounded by plasma, which can be described by the equations of magnetohydrodynamics (MHD).
The detection of gravitational waves has been one of the most exciting scientific developments of the XXIst century. These detections are theory-driven, they rely on the existence of waveform libraries, which have been constructed for binary black holes and neutron stars. Gr@v members have collaborated on the construction of the first waveform catalogue for exotic compact objects, an effort led by former Gr@v member Nicolas Sanchis Gual (now at the U. Valencia).
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized:
