INFINA (EX INFIP)   05545
INSTITUTO DE FISICA INTERDISCIPLINARIA Y APLICADA
Unidad Ejecutora - UE
artículos
Título:
Kelvin-Helmholtz Multi-Spacecraft Studies at the Earth's Magnetopause Boundaries
Autor/es:
FOULLON, C.; FARRUGIA, C. J.; OWEN, C. J.; FAZAKERLEY, A. N.; GRATTON, F. T.
Revista:
AIP CONFERENCE PROCEEDINGS
Editorial:
American Institute of Physics
Referencias:
Lugar: Washington, D.C.; Año: 2010 vol. 1216 p. 483 - 486
ISSN:
0094-243X
Resumen:
The Kelvin-Helmholtz (KH) instability can operate in various situations in the solar wind, but at the boundaries of planetary obstacles, for example the Earth´s magnetopause, it is most amenable to investigation. Reliable estimates of wave characteristics are essential for comparison with theoretical and numerical models and for understanding the nonlinear development of KH waves and their role in the plasma entry into the magnetosphere. After discussing their typical conditions of appearance in KH unstable domains at the magnetopause, both theoretically and observationally, we outline recent results of multi-spacecraft analysis with Cluster giving accurate, albeit spatially limited, determination of surface wave characteristics. Those characteristics (wavelength and propagation direction), close to the terminator on the nightside, are likely to be prescribed by the 3-D geometry and the bending of field lines developed by the KH waves, rather than by the magnitude and the direction of the magnetosheath or background flow. An unprecedented number of satellites provides now the opportunity to extend the analysis of source regions of KH waves and their domains of development.