Jiemin Wang Submitted: 2007-11-07 02:12
An intermediate shock-like event was observed by Voyager 2 on 9 January 1979. The discontinuity structure is well identified to be a 2??3 type intermediate shock by fitting the Rankine-Hugoniot relations. The shock satisfies the following conditions: (1) The plasma density increases from the upstream region to the downstream region. (2) The normal Alfvén-Mach number (MA) is greater than unity in the preshock state and less than unity in the postshock state. (3)The fast-mode Mach number in the upstream and downstream regions are less than unity and both the slow-mode Mach number are greater than unity. (4) The tangential component of the magnetic field changes sign across the shock front.
Authors: HengQiang Feng Jiemin Wang