Solar wind interaction with the earth's magnetic field. IV - Preshock perturbation of the solar wind

Details Solar wind interaction with the earth's magnetic field. IV - Preshock perturbation of the solar wind Solar wind interaction with the earth's magnetic field. IV - Preshock perturbation of the solar wind

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.3907f&link_type=abstract

Journal of Geophysical Research, vol. 81, Aug. 1, 1976, p. 3907-3912. Research supported by the Consiglio Nazionale delle Ricer

Physics

10

Earth Magnetosphere, Geomagnetism, Plasma Interactions, Solar Wind, Bow Waves, Heos Satellites, Lines Of Force, Magnetic Flux, Magnetic Variations, Solar Protons, Solar Wind Velocity, Velocity Distribution

Scientific paper

Heos-1 plasma and magnetic field data are used to study the interaction of solar wind protons with protons reflected at the bow shock. The shape of this preshock perturbation region of the solar wind, created by the reflected protons, depends on the magnetic field direction along which the protons move with a velocity twice that of the solar wind. The interaction of the solar wind with the backstreaming protons produces low frequency (0.02 Hz) circularly polarized mainly upstream waves. The following results are noted: (1) the unperturbed solar wind bulk proton speed after interaction with reflected particles appears to decrease by 30 km/s on the average, and (2) the low-frequency magnetosonic wave amplitude is well correlated with the solar wind bulk speed and with solar wind proton density up to densities of 8 per cu cm.

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