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In this 54-minute colloquium, Dr. Nicolas Peschken from the University of Florence explores how cosmic rays accelerate galactic winds in Milky Way-like galaxies. Learn about high-energy charged particles, primarily protons and electrons, produced in supernova remnants that dynamically interact with interstellar medium gas, transferring momentum and energy to generate powerful galactic winds. Discover why this mechanism, though highly effective at driving large-scale outflows in massive galaxies, is often overlooked in current galaxy models. Follow along as Dr. Peschken presents magneto-hydrodynamical simulations comparing purely thermally-driven outflows to those incorporating cosmic rays, highlighting their critical influence on galactic winds. The presentation also discusses how this research enhances our understanding of wind dynamics and composition in our own Galaxy. This Warsaw colloquium for theoretical physics was presented at the Centrum Fizyki Teoretycznej PAN on March 5, 2025.
