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Title: Magnetohydrodynamic Turbulence in the Plasmoid-mediated Regime

Journal Article · · The Astrophysical Journal (Online)
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3];  [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)
  2. Harvard Univ., Cambridge, MA (United States); Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Magnetohydrodynamic turbulence and magnetic reconnection are ubiquitous in astrophysical environments. In most situations these processes do not occur in isolation but interact with each other. This renders a comprehensive theory of these processes highly challenging. Here we propose a theory of magnetohydrodynamic turbulence driven at a large scale that self-consistently accounts for the mutual interplay with magnetic reconnection occurring at smaller scales. Magnetic reconnection produces plasmoids (flux ropes) that grow from turbulence-generated noise and eventually disrupt the sheet-like structures in which they are born. The disruption of these structures leads to a modification of the turbulent energy cascade, which in turn exerts a feedback effect on the plasmoid formation via the turbulence-generated noise. The energy spectrum in this plasmoid-mediated range steepens relative to the standard inertial range and does not follow a simple power law. As a result of the complex interplay between turbulence and reconnection, we also find that the length scale that marks the beginning of the plasmoid-mediated range and the dissipation length scale do not obey true power laws. The transitional magnetic Reynolds number above which the plasmoid formation becomes statistically significant enough to affect the turbulent cascade is fairly modest, implying that plasmoids are expected to modify the turbulent path to dissipation in many astrophysical systems

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-09-CH11466
OSTI ID:
1425071
Journal Information:
The Astrophysical Journal (Online), Vol. 854, Issue 2; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

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Cited By (11)

Forced magnetic reconnection and plasmoid coalescence: I. Magnetohydrodynamic simulations journal February 2019
Scalings pertaining to current sheet disruption mediated by the plasmoid instability journal September 2019
3D turbulent reconnection: Theory, tests, and astrophysical implications journal January 2020
The role of electron heating physics in images and variability of the Galactic Centre black hole Sagittarius A* journal June 2018
Stochastic Reconnection for Large Magnetic Prandtl Numbers journal June 2018
Large-scale Compression Acceleration during Magnetic Reconnection in a Low- β Plasma journal October 2018
The Interplay of Magnetically Dominated Turbulence and Magnetic Reconnection in Producing Nonthermal Particles journal November 2019
The role of electron heating physics in images and variability of the Galactic Centre black hole Sagittarius A* text January 2018
Role of the Plasmoid Instability in Magnetohydrodynamic Turbulence text January 2018
Scalings Pertaining to Current Sheet Disruption Mediated by the Plasmoid Instability text January 2019
3D Turbulent Reconnection: Theory, Tests and Astrophysical Implications text January 2020

Figures / Tables (1)


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