The Uranian bow shock - Voyager 2 inbound observations of a high Mach number shock

Details The Uranian bow shock - Voyager 2 inbound observations of a high Mach number shock The Uranian bow shock - Voyager 2 inbound observations of a high Mach number shock

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.8603b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Aug. 1, 1987, p. 8603-8612.

Physics

38

Bow Waves, Planetary Magnetospheres, Shock Waves, Solar Wind, Uranus (Planet), Voyager 2 Spacecraft, Mach Number, Magnetosheath, Rankine-Hugoniot Relation, Solar Wind Velocity, Uranus, Bow Shock, Spacecraft Observations, Voyager 2 Mission, Plasma, Magnetometer, Dayside, Magnetosphere, Magnetohydrodynamics, Structure, Magnetosheath, Parameters, Magnetic Fields, Shock Effects, Oscillations, Damping, Downstream, Geometry, Diagrams, Theoretical Studies, Velocity, Kinetic Energy, Solar Wind, Comparisons, Calcula

Scientific paper

The Voyager 2 magnetometer and plasma detector measured a high Mach number (fast magnetosonic number MMS > 15), high β (≡3) bow shock on the dayside of the Uranian magnetosphere. Although the average conditions on either side of the shock are consistent with the Rankine-Hugoniot (MHD) relations for a stationary, quasi-perpendicular shock, the data revealed both detailed structure in the transition region as well as considerable variability in the downstream magnetosheath plasma. The bulk plasma parameters and the magnetic field exhibited some of the characteristics of a supercritical shock: an overshoot followed by damped oscillations downstream, consistent with recent theoretical models of high Mach number quasi-perpendicular shocks.

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