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- W1968311205 abstract "Angular momentum transport and particle acceleration during the magnetorotational instability (MRI) in a collisionless accretion disk are investigated using three-dimensional particle-in-cell (PIC) simulation. We show that the kinetic MRI can provide not only high energy particle acceleration but also enhancement of angular momentum transport. We find that the plasma pressure anisotropy inside the channel flow with $p_{|} > p_{perp}$ induced by active magnetic reconnection suppresses the onset of subsequent reconnection, which in turn leads to high magnetic field saturation and enhancement of Maxwell stress tensor of angular momentum transport. Meanwhile, during the quiescent stage of reconnection the plasma isotropization progresses in the channel flow, and the anisotropic plasma with $p_{perp} > p_{|}$ due to the dynamo action of MRI outside the channel flow contributes to rapid reconnection and strong particle acceleration. This efficient particle acceleration and enhanced angular momentum transport in a collisionless accretion disk may explain the origin of high energy particles observed around massive black holes." @default.
- W1968311205 created "2016-06-24" @default.
- W1968311205 creator A5021961795 @default.
- W1968311205 date "2015-02-12" @default.
- W1968311205 modified "2023-10-14" @default.
- W1968311205 title "Angular Momentum Transport and Particle Acceleration During Magnetorotational Instability in a Kinetic Accretion Disk" @default.
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- W1968311205 doi "https://doi.org/10.1103/physrevlett.114.061101" @default.
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