Observational Evidence for Stochastic Shock Drift Acceleration of Electrons at the Earth's Bow Shock - INSPIRE

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Observational Evidence for Stochastic Shock Drift Acceleration of Electrons at the Earth's Bow Shock

Feb 17, 2020

7 pages

Published in:

Phys.Rev.Lett. 124 (2020) 065101

e-Print:

2002.06787 [astro-ph.HE]

DOI:

10.1103/PhysRevLett.124.065101 (publication)

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Abstract: (arXiv)

The first-order Fermi acceleration of electrons requires an injection of electrons into a mildly relativistic energy range. However, the mechanism of injection has remained a puzzle both in theory and observation. We present direct evidence for a novel stochastic shock drift acceleration theory for the injection obtained with Magnetospheric Multiscale (MMS) observations at Earth's bow shock. The theoretical model can explain electron acceleration to mildly relativistic energies at high-speed astrophysical shocks, which may provide a solution to the long-standing issue of electron injection.

Note:

7 pages, 4 figures. Published in PRL

References(45)

Figures(4)

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