Plasmoid Dominated Magnetic Reconnection and Particle Acceleration

The effect of a parallel velocity shear on the explosive phase of magnetic reconnection in a double tearing mode is investigated within the 2D resistive magneto-hydrodynamic framework. All the systems follow a three phase evolution pattern with the phases delayed in time for an increasing shear spee...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2020-06, Vol.16 (S362), p.410-416
Main Authors: Paul, Arghyadeep, Nandy, Sirsha, Vaidya, Bhargav
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Contributed Paper
Current sheets
Energy spectra
Magnetic fields
Magnetohydrodynamics
Particle acceleration
Shear
Velocity
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Summary:The effect of a parallel velocity shear on the explosive phase of magnetic reconnection in a double tearing mode is investigated within the 2D resistive magneto-hydrodynamic framework. All the systems follow a three phase evolution pattern with the phases delayed in time for an increasing shear speed. We find that the theoretical dependence of the reconnection rate with shear remains true in more general scenarios such as that of a plasmoid dominated double current sheet system. We also find that the power-law distribution of plasmoid sizes become steeper with an increasing sub-Alfvénic shear. We further demonstrate the effect of a velocity shear on acceleration of test particles pertaining to the modification in the energy spectrum.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921322001272