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Plasmoid identification and statistics in two-dimensional Harris sheet and GRMHD simulations by Vos, Jesse; Olivares, Hector; Cerutti, Benoit; Moscibrodzka, Monika is a scholarly article available to read on EtoBox.

What is Plasmoid identification and statistics in two-dimensional Harris sheet and GRMHD simulations about?

Magnetic reconnection is a ubiquitous phenomenon for magnetized plasmas and leads to the rapid reconfiguration of magnetic field lines. During reconnection events, plasma is heated and accelerated until the magnetic field lines enclose and capture the plasma within a circular configuration. These plasmoids could therefore observationally manifest themselves as hot spots that are associated with flaring behavior in supermassive black hole systems, such as Sagittarius A$^\ast$. We have developed a novel algorithm for identifying plasmoid structures, which incorporates watershed and custom closed contouring steps. From the identified plasmoids, we determine the plasma characteristics and energetics in magnetohydrodynamical simulations. The algorithm's performance is showcased for a high-resolution suite of axisymmetric ideal and resistive magnetohydrodynamical simulations of turbulent accretion discs surrounding a supermassive black hole. For validation purposes, we also evaluate several Harris current sheets that are well-investigated in the literature. Interestingly, we recover the characteristic power-law distribution of plasmoid sizes for both the black hole and Harris sheet simul

Author

Vos, Jesse; Olivares, Hector; Cerutti, Benoit; Moscibrodzka, Monika

Published

2023

Language

EN