Monte Carlo radiation transport through a chain of trans-relativistic plasmoids reproduces the 100 keV cutoff and predicts strong perpendicular polarization above 1 keV due to planar confinement of plasmoid motion.
Formation of Magnetically Truncated Accretion Disks in 3D Radiation-transport Two-temperature GRMHD Simulations
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Turbulent electron-ion coronae around accreting black holes self-regulate into a two-temperature state that generates nonthermal ions and X-ray spectra consistent with observations including an MeV tail.
Machine learning on simulated images identifies that flux eruption events cause more diffuse, polarized, lower-flux millimeter emission with decreased Q-U loop rotation rate, achieving ~80% accuracy with random forests on summary statistics.
A Monte Carlo model of a Kerr black hole corona shows that photon collisions create a dense electron-positron pair cloud concentrated near the black hole, yielding X-ray temperatures, Compton parameters, and 4-10% polarization consistent with binary black hole observations.
A population of AGN coronae with magnetization parameters spanning up to σ ~ 10 can reproduce the entire observed diffuse neutrino flux from TeV to PeV energies.
Simulations show magnetic field configurations set truncation radii and resonant cavities that produce QPO frequencies in thin disks matching black hole X-ray binary observations.
Radiative cooling in MADs above a transition accretion rate creates thinner denser filaments with increased efficiency, rendering conventional scale height measures misleading and motivating a new definition based on the polar position of the density maximum.
GRRMHD simulations of CEM-adapted tori find thermal instability in 17-46 days with spin-dependent X-ray decline and soft excess matching AT2021ehb observations.
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