The cosmologically integrated neutrino emission from supermassive black hole coronae in Seyfert galaxies can account for the sub-PeV diffuse extragalactic neutrino flux observed by IceCube.
Lemoine, Journal of Plasma Physics89, 175890501 (2023), 2304.03023
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Ensemble simulations find linear magnetic energy growth (p_nl=1) in subsonic small-scale dynamos and quadratic growth (p_nl=2) in supersonic ones, with universal conversion efficiency ~1/100 of turbulent kinetic energy flux and nonlinear phase duration ~20 t0.
3D PIC simulations of relativistic turbulence show mirror interactions drive perpendicular momentum gains correlated with local magnetic-field strengthening, yielding anisotropic high-energy particle distributions and enhanced confinement.
Simulations show that drift dominance over diffusion can create a knee at PeV energies if parallel diffusion becomes energy-independent above 1 TeV, though some setups fail to match observed grammage.
citing papers explorer
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Particle Acceleration, Coronal Neutrino Production, and the Diffuse Extragalactic Neutrino Background from Supermassive Black Holes
The cosmologically integrated neutrino emission from supermassive black hole coronae in Seyfert galaxies can account for the sub-PeV diffuse extragalactic neutrino flux observed by IceCube.
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Studying the mirror acceleration via kinetic simulations of relativistic plasma turbulence
3D PIC simulations of relativistic turbulence show mirror interactions drive perpendicular momentum gains correlated with local magnetic-field strengthening, yielding anisotropic high-energy particle distributions and enhanced confinement.
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Transition from Diffusion to Drift-Dominated Cosmic Ray Transport and the Origin of the Knee
Simulations show that drift dominance over diffusion can create a knee at PeV energies if parallel diffusion becomes energy-independent above 1 TeV, though some setups fail to match observed grammage.