Ivan Minchev Postdoctoral Fellow Observatoire Astronomique de Strasbourg

Title: Galactic Disks: Ringing, Streaming, Blurring and Churning

Abstract: Galactic disks are usually modeled as equilibrium, unevolving systems. However, recent works suggests that non-equilibrium processes due to perturbations from minor mergers, spirals structure and central bars, could be very important for the galactic disk evolution. I will present several new results supporting this possibility: (i) perturbations on the host galaxy disk from a minor merger (ringing), (ii) transient low-velocity moving groups in the solar neighborhood resulting from a recently formed Galactic bar (streaming), and (iii) a powerful new radial migration mechanism at work in barred spirals caused by spiral-bar resonance overlap (churning and blurring).