A Survey of Electrostatic Solitary Structures in the Jovian Magnetosphere

Details A Survey of Electrostatic Solitary Structures in the Jovian Magnetosphere A Survey of Electrostatic Solitary Structures in the Jovian Magnetosphere

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusm.p43b..02k&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #P43B-02

Other

5737 Magnetospheres (2756), 7815 Electrostatic Structures, 2772 Plasma Waves And Instabilities (2471)

Scientific paper

The two Voyager spacecraft flew through the Jovian magnetosphere in 1979, prior to the realization that broadband electrostatic noise (BEN) at Earth was actually due to electrostatic solitary structures. Broadband electrostatic noise was recognized at Jupiter, most notably near the edge of the plasma sheet, presumably a region analogous to the plasma sheet boundary layer in Earth's magnetosphere. The early Voyager observations correctly associated BEN occurring between about 12 and 28 RJ on field lines which map into the Jovian auroral regions. In this paper, we revisit Voyager wideband waveform measurements in regions of BEN to show that, as at Earth, this phenomenon is also associated with electrostatic solitary structures. Further, we examine other magnetospheric regions at Jupiter, most notably the magnetopause, and find that, similar to Earth, these regions are characterized by the existence of electrostatic solitary structures as well. While Voyager is limited to a single axis electric antenna, hence, cannot directly measure either the speed or size of the structures, we can provide preliminary characteristics of the structures such as the nature of the waveforms (monopolar, dipolar, etc.) and the characteristic time scales of them.

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