Understanding the mechanisms that drive particle acceleration at collisionless, non-relativistic shocks—such as those in supernova remnants—is essential for unveiling the origin of cosmic rays. We use hybrid simulations (kinetic ions–fluid electrons) to study particle acceleration and magnetic field amplification at non-relativistic, weakly magnetized, perpendicular shocks. While no...
Understanding how cosmic rays attain their very high energies remains one of the key open problems in astrophysics. In this talk, I will discuss recent progress on particle acceleration in turbulent, magnetized plasmas, focusing on environments such as magnetized winds, jets, and black hole coronae. I will present results from first-principles particle-in-cell simulations that reveal how...
