Alfvén Instability in a Compressible Flow

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

9 Dyfyniadau (Scopus)
175 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

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.
Iaith wreiddiolSaesneg
Rhif yr erthygl245001
Nifer y tudalennau4
CyfnodolynPhysical Review Letters
Cyfrol101
Rhif cyhoeddi24
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 08 Rhag 2008

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