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Alfvén instability in a compressible flow

Taroyan, Y. (2008) Alfvén instability in a compressible flow. Physical Review Letters, 101 (24). Art. No. 245001. ISSN 1079-7114

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A new ideal magnetohydrodynamic instability is presented. It is shown that linear incompressible Alfvénic disturbances can get over-reflected and exponentially amplified in compressible plasma flows. A simple and transparent stability criterion for a two-layer model is derived. The instability does not require a shear in the flow and may arise for rather moderate sub-Alfvénic flow speeds. It is therefore important to be aware of the Alfvén instability when dealing with laboratory or astrophysical plasma flows.

Item Type: Article
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield)
Depositing User: Mrs Megan Hobbs
Date Deposited: 24 Mar 2010 15:14
Last Modified: 16 Nov 2015 11:49
Published Version: http://dx.doi.org/10.1103/PhysRevLett.101.245001
Status: Published
Publisher: American Physical Society
Identification Number: 10.1103/PhysRevLett.101.245001
URI: http://eprints.whiterose.ac.uk/id/eprint/10682

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