Basic Space Plasma Physics

...inversely proportional to the square root of the
electron density...
The collisional term is defined by R = R_{ei}
= R_{ie} ...
...reveals another interesting property. Since v_{n} and B_{n} are constant, the tangential velocity and tangential magnetic field difference vectors are parallel. Magnetic field strength and thermal pressure are each continuous across the discontinuity...
v is errorneously shown to be constant across a rotational discontinuity in the second panel from the bottom on the righthand side. In fact, only v_{n} is constant across a RD.
The upper equation should read: