Electron Acceleration during Macroscale Magnetic Reconnection

Author
Keywords
Abstract
The first self-consistent simulations of electron acceleration during magnetic reconnection in a macroscale system are presented. Consistent with solar flare observations, the spectra of energetic electrons take the form of power laws that extend more than two decades in energy. The drive mechanism for these nonthermal electrons is Fermi reflection in growing and merging magnetic flux ropes. A strong guide field suppresses the production of nonthermal electrons by weakening the Fermi drive mechanism. For a weak guide field the total energy content of nonthermal electrons dominates that of the hot thermal electrons even though their number density remains small. Our results are benchmarked with the hard x-ray, radio, and extreme ultraviolet observations of the X8.2-class solar flare on September 10, 2017.
Year of Publication
2021
Journal
Physical Review Letters
Volume
126
Number of Pages
135101
Date Published
04/2021
ISSN Number
0031-9007
URL
https://ui.adsabs.harvard.edu/abs/2021PhRvL.126m5101A
DOI
10.1103/PhysRevLett.126.135101