Advanced interferometric techniques as those employed in the Event Horizon Telescope (EHT) and GRAVITY recently allowed to study the environment of the two nearest supermassive black hole candidates at horizon-scale resoluton.
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 News & Events
Penrose process remains a textbook example of a mechanism for energy extraction from black holes, yet there are many impediments to its practical viability. The longest known problem is that it requires a particle to split into two fragments with very high relative velocity.