Crynodeb
Shear flow instabilities are an important aspect of hydrodynamic
studies. The present review article discusses the role of an ambient
magnetic field which both modifies the Kelvin-Helmholtz instability and
may introduce new types of magnetohydrodynamic waves and instabilities.
A brief overview of magnetospheric pulsations is presented with an
emphasis on the long-period resonant Alfvén waves associated with
the high speed solar wind. The spatio-temporal evolution of magnetically
modified shear flow instabilities in various space plasma structures is
addressed. A distinction between convective and absolute instabilities
is necessary for proper understanding of theory and correct
interpretation of the observations. Finally, it is shown how
incompressible Alfvénic disturbances may become unstable in a
compressible flow in the absence of any shear. An application to coronal
loops is presented.
Iaith wreiddiol | Saesneg |
---|---|
Tudalennau (o-i) | 505-523 |
Cyfnodolyn | Space Science Reviews |
Cyfrol | 158 |
Rhif cyhoeddi | 2-4 |
Dynodwyr Gwrthrych Digidol (DOIs) | |
Statws | Cyhoeddwyd - Gorff 2011 |