Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session BO06: Astrophysical Turbulence and Dynamos
9:30 AM–12:30 PM,
Monday, November 8, 2021
Room: Rooms 310-311
Chair: Archie Bott, Princeton University
Abstract: BO06.00009 : Collisionless magnetorotational turbulence in electron-ion plasmas*
11:06 AM–11:18 AM
Presenter:
Fabio Bacchini
(University of Colorado, Boulder)
Authors:
Fabio Bacchini
(University of Colorado, Boulder)
Dmitri A Uzdensky
(University of Colorado, Boulder)
Gregory R Werner
(University of Colorado, Boulder)
Mitchell C Begelman
(University of Colorado, Boulder)
Vladimir V Zhdankin
(Center for Computational Astrophysics, Flatiron Institute)
In radiatively inefficient accretion flows, plasmas are expected to be collisionless, with ions and electrons at different temperatures. This physical state may be promoted by MRI-driven reconnection and turbulence, which could cause differential heating between the two species. However, the dynamics of the collisionless MRI has been hardly ever explored in electron-ion plasmas.
With large-scale Particle-in-Cell simulations including the electron kinetic physics, we investigate the nonlinear development of the collisionless MRI in electron-ion plasmas. We find qualitative differences with previous pair-plasma studies. We investigate the turbulent stresses and effective viscosity arising during the MRI evolution, the differential heating affecting the two particles species, and the subsequent nonthermal particle acceleration and radiative signatures.
*Work supported by NASA grant 80NSSC20K0545
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