Physics Colloquium with Yajie Yuan on Particle Accelerators

Physics Colloquium with Yajie Yuan on Particle Accelerators

Yajie Yuan (Hosted by Krawczynski) from Center for Computational Astrophysics, Flatiron Institute, will be presenting the colloquium "Physics of extreme particle accelerators in the Universe"

Black holes and neutron stars produce the most spectacular relativistic outflows. These are usually prolific emitters of high energy radiation; they may also produce high energy neutrinos and ultra-high energy cosmic rays. How the energy from the central engine goes into particle energization and radiation has been a long standing puzzle. Right now with the unprecedented advantage in multiwavelength/multimessenger observations, and rapid progress in high-performance, large-scale simulations, we are getting closer to the physical answer. Using first-principles simulations, my recent works have shown that dissipation of the large electromagnetic energy in these outflows may power gamma-ray flares from relativistic jets, X-ray emission from accretion disk coronae, and fast radio bursts from magnetars. In this talk, I will discuss some of this progress, and promising future directions.

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