Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm11a0311j&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM11A-0311
Other
2724 Magnetopause And Boundary Layers, 2728 Magnetosheath, 2752 Mhd Waves And Instabilities (2149, 6050, 7836), 2772 Plasma Waves And Instabilities (2471)
Scientific paper
Mirror modes structures are commonly observed in planetary magnetosheaths, cometary sheaths, and other plasmas with anisotropic temperature distributions. Here we present the preliminary analysis of a wave train event observed by the five THEMIS spacecraft on May 19, 2007 from 02:40 to 02:50 UT. During this event, all of the spacecraft returned high time resolution magnetic field and plasma data. All five spacecraft observed compressional fluctuations in the magnetic field that are in anti-phase with the plasma pressure fluctuations, as is expected for mirror modes. The two spacecraft closest to the Earth, and presumably closest to the magnetopause, observed magnetic field dips (decreases relative to the background field). The other three spacecraft were closely spaced approximately 2.5 RE further from the Earth. These more distant spacecraft observed a train of quasi-periodic field fluctuations with possibly a few magnetic peaks (increases relative to the background field) near the end of the event. We will present the plasma distribution functions and anisotropies for each of the spacecraft before, during, and after the event and relate them to the type of magnetic structures observed. In addition, we will discuss how these data compare to our observations of mirror mode structures in the Jovian magnetosheath.
Angelopoulos V. A.
Auster Uli
Carlson Carl W.
Galland Kivelson Margaret
Glassmeier K.-
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