Contributed Talk - Splinter Compact

Tuesday, 12 September 2023, 15:15   (H 2036)

Probing the radiation microphysics around spinning black holes and relativistic jets

Christian Fromm
JMU Wuerzburg

Relativistic jets are among the most powerful objects in the universe. They are launched from rotating supermassive black holes and accelerate particles to highest energies. However, the detailed mechanism behind their formation and acceleration is still unknown. Recent and future Very-Long-Baseline Interferometric (VLBI) observations at millimetre wavelength resolve simultaneously the horizon-scale structure around black holes and the jet launching zone. This unique capability will allow us to probe the formation of relativistic jets and plasma physics under extreme conditions. In order to explore these capabilities and to provide theoretical expectations we perform 3D general relativistic magnetohydrodynamic (GRMHD) simulations of accretion on to black holes and jet launching. We include different electron heating models inspired from particle-in-cell simulations in our simulations to mimic the radiation microphysics and acceleration mechanisms. From our GRMHD simulations we compute multi-wavelength radiative signatures which can be used to distinguish between heating models, particle distributions and their acceleration sites using future VLBI observations.