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Spatially Separated Electron and Proton Beams in a Simulated Solar Coronal Jet

Pallister, Ross and Wyper, Peter F. and Pontin, David I. and DeVore, C. Richard and Chiti, Federica (2021) 'Spatially Separated Electron and Proton Beams in a Simulated Solar Coronal Jet.', The astrophysical journal., 923 (2). p. 163.


Magnetic reconnection is widely accepted to be a major contributor to nonthermal particle acceleration in the solar atmosphere. In this paper we investigate particle acceleration during the impulsive phase of a coronal jet, which involves bursty reconnection at a magnetic null point. A test-particle approach is employed, using electromagnetic fields from a magnetohydrodynamic simulation of such a jet. Protons and electrons are found to be accelerated nonthermally both downwards toward the domain's lower boundary and the solar photosphere, and outwards along the axis of the coronal jet and into the heliosphere. A key finding is that a circular ribbon of particle deposition on the photosphere is predicted, with the protons and electrons concentrated in different parts of the ribbon. Furthermore, the outgoing protons and electrons form two spatially separated beams parallel to the axis of the jet, signatures that may be observable in in-situ observations of the heliosphere.

Item Type:Article
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Publisher statement:Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Date accepted:No date available
Date deposited:04 January 2022
Date of first online publication:20 December 2021
Date first made open access:04 January 2022

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