Particle physics models of dark matter, and extensions to the Standard Model, predict the existence of a large abundance of light scalar degrees of freedom in the universe. From a diffuse cloud, these can form into rotating clumps of energy - boson stars.
The December 2020 issue of the Aveiro University magazine "Linhas UA" includes a feature article covering work at Gr@v and the mysteries of black holes. Check this issue here.
Screened modified gravity is inherently elusive: screening mechanisms suppress the propagation of additional gravitational degrees of freedom in typical astrophysical scenarios, allowing these theories to avoid constraints coming from weak field observations.
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized:
Full Name: João Pedro de Araújo Novo