Reconnection Properties of Large-Scale Current Sheets During Coronal Mass Ejection Eruptions

Abstract

We present a detailed analysis of the properties of magnetic reconnection at large-scale current sheets in a high cadence version of the Lynch & Edmondson (2013) 2.5D MHD simulation of sympathetic magnetic breakout eruptions from a pseudostreamer source region. We examine the resistive tearing and breakup of the three main current sheets into chains of X- and O-type null points and follow the dynamics of magnetic island growth, their merging, transit, and ejection with the reconnection exhaust. For each current sheet, we quantify the evolution of the length-to-width aspect ratio (up to $\sim$100:1), Lundquist number ($\sim$10${}^3$), and reconnection rate (inflow-to-outflow ratios reaching $\sim$0.40). We examine the statistical and spectral properties of the fluctuations in the current sheets resulting from the plasmoid instability, including the distribution of magnetic island area, mass, and flux content. We show that the temporal evolution of the spectral index of the reconnection-generated magnetic energy density fluctuations appear to reflect global properties of the current sheet evolution. Our results are in excellent agreement with recent, high resolution reconnection-in-a-box simulations even though our current sheets' formation, growth, and dynamics are intrinsically coupled to the global evolution of sequential sympathetic CME eruptions.

41 pages, 15 figures. Accepted for publication in ApJ on 21 April 2016

References in corpus (7)

• Instability of current sheets and formation of plasmoid chains
• Sympathetic Magnetic Breakout Coronal Mass Ejections from Pseudostreamers
• Flux Rope Formation Preceding Coronal Mass Ejection Onset
• On the Distribution of Plasmoids In High-Lundquist-Number Magnetic Reconnection
• Magnetic-Island Contraction and Particle Acceleration in Simulated Eruptive Solar Flares
• Resistive magnetohydrodynamic simulations of X-line retreat during magnetic reconnection
• Distribution Functions of Sizes and Fluxes Determined from Supra-Arcade Downflows

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