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Join this lecture where Richard Anantua explores the role of positrons in black hole systems. Learn how general relativistic magnetohydrodynamic simulations coupled with ray tracers help test particle energetics against horizon-scale data for active galactic nuclei like M87. Discover how the "Observing" JAB (jet/accretion flow/black hole) Simulations methodology reveals distinguishable Faraday-effect-mediated positron signatures in SANE and MAD HARM simulations. The lecture also covers groundwork for detecting superradiant axion production around supermassive black holes and examines a novel application involving primordial black holes accreting positronium in KORAL simulations during the early universe, potentially explaining a substantial fraction of dark matter today.
