Cluster observations of the boundary waves and magnetic reconnection at the dawnside magnetospheric flank

Details Cluster observations of the boundary waves and magnetic reconnection at the dawnside magnetospheric flank Cluster observations of the boundary waves and magnetic reconnection at the dawnside magnetospheric flank

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm11c..03n&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM11C-03

Physics

7835 Magnetic Reconnection, 7859 Transport Processes, 2724 Magnetopause, Cusp, And Boundary Layers, 2752 Mhd Waves And Instabilities, 2794 Instruments And Techniques

Scientific paper

We will examine Cluster observations at the far tail closely equatorial magnetospheric flank during periods small positive b\z. For several hours Cluster satellites had several quasi-periodic encounters of low density, high temperature magnetospheric-like of plasma and high density, low temperature magnetosheath-like plasma with a frequency ˜ 5 minutes. The velocity and magnetic field components show more rapid oscillations with frequency ˜ 2 minutes, which indicates sub-structure embedded in the large scale motion. The boundary normals showed significant fluctuations in z-direction, and bipolar variations of the normal component of the magnetic field were observed together with local pressure enhancements. In addition the satellites observed several intervals satisfying the Walen relation and the de Hoffman Teller frame, often with much higher or lower transformation velocity than that of the overall boundary. We will discuss the role of the reconnection inside the non-linear Kelvin-Helmholtz vortices and local flux transfer events to account for these observations

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