Abstract: I will discuss the relevance of the spins of massive black holes as probes of the coevolution of these objects with their host galaxies, as well as for the dynamics of binary systems and accretion disks, and for gravitational-wave emission. I will also present a semi-analytical model for the cosmological evolution of the spins of the massive black-hole population, and show that comparison of this model to existing spin measurements from relativistic iron lines allows one to put constraints on competing accretion scenarios. I will also comment on the prospects to test this model using future gravitational-wave space-based detectors.
Abstract: In the current paradigm, AGNs are galaxies that harbour in their centre super massive black holes, the later being the main engine that explains the multi-messenger and extreme nature of these objects. In this talk I will present recent results from a multi-frequency study of radio loud AGNs, and summarise work in progress in the framework of the Gaia (ESA) mission and the Square Kilometer Array pathfinders.
Abstract: The natural laboratories for testing the strong-field regime of gravity and for testing the modified gravitational theories are the neutron stars. In my talk I will present some results about neutron stars, both static and rotating, in f(R) theories and in scalar-tensor theories of gravity. Especially I will focus on effects in modified gravity neutron stars that drastically change the structure of the stars in comparison with General Relativity.
Abstract: We consider the possibility of multiply-connected spacetimes, ranging from the Einstein-Rosen bridge, geons, and the modern renaissance of space-time tunnels/wormholes.
Gr@v Ph.D. student Flávio Coelho successfully defended his Ph.D. thesis with title "Radiadion from a D-dimensional collision of gravitational shock waves" on February 20th 2015. Congratulations Flávio!
Our group coordinated the "Numerical Relativity and High Energy Physics" IRSES network (2012-2015). Here is a list of the global network meetings organized:
