The structure of a tangential discontinuity - Application to the cometary ionopause

Details The structure of a tangential discontinuity - Application to the cometary ionopause The structure of a tangential discontinuity - Application to the cometary ionopause

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..369f&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, March 1991, p. 369-372.

Physics

7

Cometary Magnetospheres, Halley'S Comet, Ionopause, Larmor Radius, Magnetoplasmadynamics, Giotto Mission, Magnetometers, Solar Wind

Scientific paper

The kinetic structure of a tangential discontinuity interface separating an outflowing unmagnetized plasma from an inflowing, magnetized plasma is studied using one-dimensional hybrid simultations (particle ions and fluid electrons). By including the effects of an ion-neutral collisional force and plasma loss due to recombination, it is concluded that two scale lengths control the structure of the cometary ionopause. The first is related to the ion Larmor radius of the outflowing ions which encounter the magnetic barrier, and the second is related to the balance between the ion-neutral collisional force and the electromagnetic J x B force.

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