Speaker
Description
We present a multi-scale analysis of ultralight Bose-Condensate Dark Matter (BECDM). In a first scenario we study the case of the BECDM alone, and start with the construction of non-spherical BECDM halos using multimode expansions, demonstrating that a core-envelope structure effectively recovers the rotation curves of LSB galaxies, the quantum effects of a halo are discussed from the core to the granular region, and show that these virialized structures induce chaotic trajectories on test particles. In a second scenario we solve the Schrödinger-Poisson Euler (SPE) system to study the gravitational coupling between the BECDM and baryonic gas, as a starter we show that Fermion-Boson Stars (FBS) emerge as robust attractor solutions for structure formation of galactic core size, at galactic scale we study the correlation between the BECDM granular dynamics and an ideal gas in order to determine whether BECDM has observable fingerprints on luminous matter. The coupling of BECDM and black holes leads us to find also attractor solutions, formed by the interaction between the black hole and an initial dark matter fluctuation, where the former acts as a seed for a galactic core. Finally, we present results on vortices, and show that vortex lines of BECDM imprint persistent ring-like morphological signatures on a coupled gas which survives nonlinear evolution. We finally show how vortices form from binary mergers.