Particle acceleration by magnetic Rayleigh-Taylor instability: mechanism for flares in black-hole accretion flows
arXiv:2302.05276 · doi:10.1103/PhysRevResearch.5.043023
Abstract
We study the magnetic Rayleigh-Taylor instability in relativistic collisionless plasma, as an astrophysical process for nonthermal particle acceleration. We consider dense plasma on top of a highly magnetized cavity with sheared magnetic field. Using particle-in-cell simulations, we show that small plumes grow and merge progressively to form a large-scale plume, which broadens to drive rapid magnetic reconnection in the cavity. We find that this leads to efficient particle acceleration capable of explaining flares from the inner accretion flow onto the black hole Sgr A*.
10 pages, 7 figures; accepted for publication in Physical Review Research
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- Magnetically Arrested Circumbinary Accretion Flows
- The Relationship Between Simulated Sub-Millimeter and Near-Infrared Images of Sagittarius A* from a Magnetically Arrested Black Hole Accretion Flow
- General relativistic magnetized Bondi-Hoyle-Lyttleton accretion with a spin-field misalignment: Jet nutation, polarity reversals, and Magnus drag
- Chaotic magnetic disconnections trigger flux eruptions in accretion flows channeled onto magnetically saturated Kerr black holes
- Electron and proton energization in 3D reconnecting current sheets in semirelativistic plasma with guide magnetic field
- Decoupling of a supermassive black hole binary from its magnetically arrested circumbinary accretion disk
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- Extreme magnetic fields around black holes
- Probing the disk-jet coupling in M87