Upstream waves in Saturn's foreshock

Details Upstream waves in Saturn's foreshock Upstream waves in Saturn's foreshock

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..797b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, May 1991, p. 797-800. ASI-supported research.

Physics

1

Planetary Magnetic Fields, Planetary Magnetospheres, Plasma Waves, Saturn (Planet), Bow Waves, Diurnal Variations, Magnetic Field Reconnection, Shock Waves, Voyager 1 Spacecraft

Scientific paper

An analysis based on plasma and magnetic-field data obtained from Voyager 1 during its Saturn encounter is reported. The plasma data provided every 96 sec and magnetic-field data averaged over 48 sec are utilized. The evidence of upstream waves at Saturn are detected. The waves have a period, in the spacecraft frame, of about 550 sec and a relative amplitude larger than 0.3, are left- and right-hand elliptically polarized, and propagate at about 30 deg with respect to the average magnetic field. The appearance of the waves is correlated with the spacecraft being magnetically connected to the bow shock.

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