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3D non-driven magnetic reconnection at multiple separators.

Zarqa Zahid1, C E Parnell2, Anisa Qamar1

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This study explores magnetic reconnection at multiple separators in solar plasma. It reveals two distinct phases of reconnection: a fast-strong phase dominated by Ohmic heating and a slow-weak phase with impulsive events and viscous heating.

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Area of Science:

  • Plasma Physics
  • Solar Physics
  • Magnetohydrodynamics (MHD)

Background:

  • Separators are key topological features in magnetic configurations, particularly in solar plasma.
  • They act as boundaries between flux domains, facilitating current layer formation.
  • Understanding non-driven magnetic reconnection at multiple separators is crucial due to limited existing research.

Purpose of the Study:

  • To investigate non-driven magnetic reconnection occurring at multiple separators.
  • To analyze the behavior and characteristics of magnetic reconnection in configurations with multiple null points and separators.

Main Methods:

  • Conducted two sets of experiments: non-resistive magnetohydrodynamic (MHD) relaxation and resistive MHD reconnection.
  • Utilized the LARE3D code to simulate a magnetic configuration with two null points and three non-potential separators.
  • Analyzed current layer formation, dissipation, and reconnection phases.

Main Results:

  • Identified two distinct phases of magnetic reconnection: a fast-strong phase and a slow-weak phase.
  • Observed significant current dissipation via Ohmic heating during the fast-strong phase.
  • Characterized the slow-weak phase by short-lived, impulsive reconnection events where viscous heating dominated Ohmic heating.

Conclusions:

  • Magnetic reconnection at multiple separators exhibits complex, multi-phase behavior.
  • The study provides insights into energy dissipation mechanisms (Ohmic and viscous heating) during reconnection.
  • Further research on separator reconnection holds significant potential for advancing our understanding of fundamental plasma physics.