Solitary structures associated with short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow shock

Details Solitary structures associated with short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow shock Solitary structures associated with short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow shock

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3116805b&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 16, CiteID L16805

Physics

Plasma Physics

9

Space Plasma Physics: Nonlinear Phenomena, Space Plasma Physics: Shock Waves, Space Plasma Physics: Waves And Instabilities

Scientific paper

For the first time, solitary waves (SWs) have been observed within short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow shock. The SWs often occur as bipolar pulses in the electric field data and move parallel to the background magnetic field at velocities of v = 400-1200 km/s. They have peak-to-peak amplitudes in the parallel electric field of up to E'$\parallel$ = 65 mV/m and parallel scale sizes of L$\parallel$ ~ 10 λD. The bipolar solitary waves exhibit negative potential structures of |Φ$\parallel$| = 0.4-2.2 V, i.e., eΦ$\parallel$/kTe ~ 0.1. None of the theories commonly used to describe SWs adequately address these negative potential structures moving at velocities above the ion thermal speed in a weakly magnetized plasma.

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