ASTRODEBATA / Daniel Grošelj: How Black-Hole Coronae Shine in X-rays, Gamma-rays, and Neutrinos: A Plasma Physics View

How Black-Hole Coronae Shine in X-rays, Gamma-rays, and Neutrinos: A Plasma Physics View

Daniel Grošelj
KU Leuven, Belgija

The origin of high-energy emission from black-hole accretion flows has been the subject of numerous debates. One prominent emission site is the X-ray corona, a spatially compact region within the inner accretion flow. Black-hole coronae not only shine in X-rays — their emission can extend into the soft gamma-ray band accessible to the upcoming COSI instrument, and recent IceCube observations imply they are prominent sources of high-energy neutrinos. However, the extreme conditions in these coronae, featuring intense electromagnetic fields and non-thermal particles, present serious challenges for theoretical models. Here, I will discuss a new modeling paradigm that builds on recent advances in computational plasma astrophysics. I will show how plasma simulations, tracking the self-consistent interactions among billions of charged particles and photons, enable the development of new, physically grounded models of black-hole coronae and their multi-messenger emission.

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