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Onset of Plasmoid Reconnection during Magnetorotational Instability

Journal Article · · The Astrophysical Journal. Letters
 [1];  [2]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Rensselaer Polytechnic Inst., Troy, NY (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)
The evolution of current sheets in accretion flows undergoing magnetorotational instability (MRI) is examined through two- and three-dimensional numerical modeling of the resistive MHD equations in global cylindrical geometry. With an initial uniform magnetic field aligned in the vertical (z) direction, MRI produces radially extended toroidal (azimuthal) current sheets. In both 2D and 3D when axisymmetric modes dominate, these current sheets attract each other and merge in the poloidal (rz) plane, driving magnetic reconnection when the Lundquist number S > 3 × 102, making it a possible source of plasmoids (closed magnetic loops) in accretion disks. At high Lundquist numbers in the 2D regime, starting at S = 5 × 103, self-consistent MRI-generated current sheets become thin and subject to plasmoid instability, and therefore spontaneous magnetic reconnection. When nonaxisymmetric 3D modes dominate, turbulence makes the azimuthal current sheets more unstable and stretch vertically. Toroidally extended vertical current sheets in the inner region, as well as larger 3D magnetic islands in the outer regions of the disks are also formed. These findings have strong ramifications for astrophysical disks as potential sources of plasmoids that could cause local heating, particle acceleration, and high energy EM radiation.
Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS)
Grant/Contract Number:
AC02-09CH11466
OSTI ID:
1828769
Journal Information:
The Astrophysical Journal. Letters, Journal Name: The Astrophysical Journal. Letters Journal Issue: 2 Vol. 920; ISSN 2041-8205
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (58)

Secondary tearingmode in the nonlinear evolution of magnetorotational instability journal September 2008
Magnetic Reconnection in Extreme Astrophysical Environments journal February 2011
The Solar Probe Plus Mission: Humanity’s First Visit to Our Star journal November 2015
Astrophysical jets and outflows journal January 2005
Nonlinear magnetohydrodynamics simulation using high-order finite elements journal March 2004
An Alfvenic reconnecting plasmoid thruster journal December 2020
Sweet's mechanism for merging magnetic fields in conducting fluids journal December 1957
Turbulent resistivity driven by the magnetorotational instability journal September 2009
MHD simulations of the magnetorotational instability in a shearing box with zero net flux: II. The effect of transport coefficients journal October 2007
On self-sustained dynamo cycles in accretion discs journal July 2008
Finite-Resistivity Instabilities of a Sheet Pinch journal January 1963
Instability of current sheets and formation of plasmoid chains journal October 2007
Fast reconnection in high-Lundquist-number plasmas due to the plasmoid Instability journal November 2009
Scaling of Sweet–Parker reconnection with secondary islands journal December 2009
Scaling laws of resistive magnetohydrodynamic reconnection in the high-Lundquist-number, plasmoid-unstable regime journal June 2010
Global Hall-MHD simulations of magnetorotational instability in a plasma Couette flow experiment journal June 2011
Phase diagram for magnetic reconnection in heliophysical, astrophysical, and laboratory plasmas journal November 2011
Magnetic reconnection and stochastic plasmoid chains in high-Lundquist-number plasmas journal April 2012
The plasmoid instability during asymmetric inflow magnetic reconnection journal June 2013
Gamma-ray flares in the Crab Nebula: A case of relativistic reconnection? journal May 2014
Visco-resistive plasmoid instability journal March 2016
Dynamo-driven plasmoid formation from a current-sheet instability journal December 2016
3D turbulent reconnection: Theory, tests, and astrophysical implications journal January 2020
Magnetic reconnection via current sheets journal January 1986
Power and complexity in stochastic reconnection journal July 2020
A powerful local shear instability in weakly magnetized disks. I - Linear analysis. II - Nonlinear evolution journal July 1991
A powerful local shear instability in weakly magnetized disks. III - Long-term evolution in a shearing sheet. IV - Nonaxisymmetric perturbations journal November 1992
Parasitic instabilities in magnetized, differentially rotating disks journal September 1994
Dynamo-generated Turbulence and Large-Scale Magnetic Fields in a Keplerian Shear Flow journal June 1995
Reconnection in a Weakly Stochastic Field journal June 1999
Global Three‐dimensional Magnetohydrodynamic Simulations of Black Hole Accretion Disks: X‐Ray Flares in the Plunging Region journal March 2003
Simulations of Magnetorotational Instability in a Magnetized Couette Flow journal May 2006
Saturation of Magnetorotational Instability Through Magnetic Field Generation journal May 2009
Numerical Tests of fast Reconnection in Weakly Stochastic Magnetic Fields journal June 2009
Fast Magnetic Reconnection and Spontaneous Stochasticity journal November 2011
Momentum Transport from Current-Driven Reconnection in Astrophysical Disks journal December 2011
Short Circuits in Thermally Ionized Plasmas: a Mechanism for Intermittent Heating of Protoplanetary Disks journal November 2012
Fast Magnetic Reconnection in the Solar Chromosphere Mediated by the Plasmoid Instability journal January 2015
The Tearing mode Instability of thin Current Sheets: the Transition to fast Reconnection in the Presence of Viscosity journal March 2015
Formation of plasmoids during sawtooth crashes journal May 2014
Reconnection-Powered Linear Accelerator and Gamma-Ray Flares in the crab Nebula journal August 2011
On the role of fast Magnetic Reconnection in Accreting Black hole Sources journal January 2015
Large-scale dynamo action precedes turbulence in shearing box simulations of the magnetorotational instability journal July 2016
Plasmoids in relativistic reconnection, from birth to adulthood: first they grow, then they go journal July 2016
Radially dependent large-scale dynamos in global cylindrical shear flows and the local cartesian limit journal March 2016
Transition from collisional to kinetic regimes in large-scale reconnection layers journal August 2009
Formation of Plasmoid Chains in Magnetic Reconnection journal September 2009
Fast Magnetic Reconnection in the Plasmoid-Dominated Regime journal December 2010
Plasmoids Formation During Simulations of Coaxial Helicity Injection in the National Spherical Torus Experiment journal May 2015
Instability, turbulence, and enhanced transport in accretion disks journal January 1998
Self-Sustaining Nonlinear Dynamo Process in Keplerian Shear Flows journal June 2007
MRI channel flows and their parasites journal April 2009
Stability of relativistic jets from rotating, accreting black holes via fully three-dimensional magnetohydrodynamic simulations journal March 2009
Magnetic Reconnection in Astrophysical and Laboratory Plasmas journal September 2009
Plasmoid-induced-reconnection and fractal reconnection journal June 2001
MHD Instabilities in Accretion Disks and Their Implications in Driving Fast Magnetic Reconnection journal August 2018
Magnetic Reconnection and Hot Spot Formation in Black Hole Accretion Disks journal September 2020
First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon journal March 2021

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