Pressure anisotropy and radial stress balance in the Jovian neutral sheet

Details Pressure anisotropy and radial stress balance in the Jovian neutral sheet Pressure anisotropy and radial stress balance in the Jovian neutral sheet

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9621135p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Dec. 1, 1991, p. 21,135-21,140. Research supported by NASA.

Other

14

Jupiter (Planet), Neutral Sheets, Planetary Magnetic Fields, Planetary Magnetospheres, Pressure Distribution, Anisotropy, Radial Distribution, Stress Distribution, Voyager 1 Spacecraft, Voyager 2 Spacecraft

Scientific paper

By examining particle and magnetic field data from the Voyager 1 and 2 spacecraft, signatures were found indicating that the (greater than about 28 keV) particle pressure parallel to the magnetic field is greater than the pressure perpendicular to the field within the nightside neutral sheet (three nightside neutral sheet crossings, with favorable experimental conditions, were used). By incorporating the pressure anisotropy into the calculation of radial forces within the hightside neutral sheet, it is found that (1) force balance is approximately achieved and (2) the anisotropy force term provides the largest contribution of the other particle forces considered (pressure gradients and the corotation centrifugal force). With regard to the problem of understanding the balance of radial forces within the dayside neutral sheet (McNutt, 1984; Mauk and Krimigis, 1987), the nightside pressure anisotropy force is larger than the dayside pressure gradient forces at equivalent radial distances; however, a full accounting of the dayside regions remains to be achieved.

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