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Fluctuation dynamo in a collisionless, weakly magnetized plasma

Abstract:

Results from a numerical study of fluctuation dynamo in a collisionless, weakly magnetized plasma are presented. The key difference between this dynamo and its magnetohydrodynamic (MHD) counterpart is the adiabatic production of magnetic-field-aligned pressure anisotropy by the amplification of a weak seed field. This, in turn, drives kinetic instabilities on the ion-Larmor scale - namely, firehose and mirror - which sever the adiabatic link between the thermal and magnetic pressures, thereby...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's Version

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Publisher copy:
10.3847/2041-8213/aad638

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Subgroup:
Theoretical Physics
ORCID:
0000-0003-3112-9221
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Subgroup:
Theoretical Physics
Publisher:
American Astronomical Society Publisher's website
Journal:
The Astrophysical Journal Letters
Volume:
863
Issue:
2
Pages:
Article: L25
Publication date:
2018-08-16
Acceptance date:
2018-07-26
DOI:
EISSN:
2041-8213
ISSN:
2041-8205
Pubs id:
pubs:1043319
URN:
uri:4e3c08d9-0bea-4006-a419-6426b5ff4416
UUID:
uuid:4e3c08d9-0bea-4006-a419-6426b5ff4416
Local pid:
pubs:1043319

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