Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh31a0382l&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SH31A-0382
Other
2139 Interplanetary Shocks, 2154 Planetary Bow Shocks, 2159 Plasma Waves And Turbulence, 4455 Nonlinear Waves, Shock Waves, Solitons (0689, 2487, 3280, 3285, 4275, 6934, 7851
Scientific paper
A set of experimental data is presented for a high-Mach-number (M_f=5) quasiperpendicular (θBn=81°) bow shock layer crossed by Cluster spacecraft on 24 January 2001 at 07:05--07:09 UT. The measurements of magnetic field, spectra of electric field fluctuations, and ion distributions reveal that the shock is highly nonstationary. In particular, the magnetic field profiles measured aboard different spacecraft differ considerably from each other. The mean frequency of downshifted waves observed upstream of the shock ramp oscillates with a characteristic time comparable with the proton gyroperiod. In addition, the reflection of ions from the shock seems to be bursty rather than steady and a characteristic time for this process is also comparable with the ion gyroperiod. It is suggested that all of these features are the first experimental evidence in favor of the shock front reformation.
Bosqued J.
Dunlop Malcolm
Krasnoselskikh Vladimir
Lobzin Vasili
Schwartz Sylvain
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