First-order particle acceleration in magnetically driven flows
Abstract
In this study, we demonstrate that particles are regularly accelerated while experiencing curvature drift in flows driven by magnetic tension. Some examples of such flows include spontaneous turbulent reconnection and decaying magnetohydrodynamic turbulence, where a magnetic field relaxes to a lower-energy configuration and transfers part of its energy to kinetic motions of the fluid. We show that this energy transfer, which normally causes turbulent cascade and heating of the fluid, also results in a first-order acceleration of non-thermal particles. Since it is generic, this acceleration mechanism is likely to play a role in the production of non-thermal particle distribution in magnetically dominant environments such as the solar chromosphere, pulsar magnetospheres, jets from supermassive black holes, and γ-ray bursts.
- Authors:
-
- Naval Research Lab., Washington, D.C. (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1296659
- Report Number(s):
- LA-UR-14-24412
Journal ID: ISSN 1538-4357
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 819; Journal Issue: 2; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; 43 PARTICLE ACCELERATORS; astronomy and astrophysics; acceleration of particles; magnetohydrodynamics (MHD)
Citation Formats
Beresnyak, Andrey, and Li, Hui. First-order particle acceleration in magnetically driven flows. United States: N. p., 2016.
Web. doi:10.3847/0004-637X/819/2/90.
Beresnyak, Andrey, & Li, Hui. First-order particle acceleration in magnetically driven flows. United States. https://doi.org/10.3847/0004-637X/819/2/90
Beresnyak, Andrey, and Li, Hui. Wed .
"First-order particle acceleration in magnetically driven flows". United States. https://doi.org/10.3847/0004-637X/819/2/90. https://www.osti.gov/servlets/purl/1296659.
@article{osti_1296659,
title = {First-order particle acceleration in magnetically driven flows},
author = {Beresnyak, Andrey and Li, Hui},
abstractNote = {In this study, we demonstrate that particles are regularly accelerated while experiencing curvature drift in flows driven by magnetic tension. Some examples of such flows include spontaneous turbulent reconnection and decaying magnetohydrodynamic turbulence, where a magnetic field relaxes to a lower-energy configuration and transfers part of its energy to kinetic motions of the fluid. We show that this energy transfer, which normally causes turbulent cascade and heating of the fluid, also results in a first-order acceleration of non-thermal particles. Since it is generic, this acceleration mechanism is likely to play a role in the production of non-thermal particle distribution in magnetically dominant environments such as the solar chromosphere, pulsar magnetospheres, jets from supermassive black holes, and γ-ray bursts.},
doi = {10.3847/0004-637X/819/2/90},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 819,
place = {United States},
year = {Wed Mar 02 00:00:00 EST 2016},
month = {Wed Mar 02 00:00:00 EST 2016}
}
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Works referencing / citing this record:
Role of magnetic field curvature in magnetohydrodynamic turbulence
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3D turbulent reconnection: Theory, tests, and astrophysical implications
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The Roles of Fluid Compression and Shear in Electron Energization during Magnetic Reconnection
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