Further Study of Isolated Electrostatic Structures in the Solar Wind

Details Further Study of Isolated Electrostatic Structures in the Solar Wind Further Study of Isolated Electrostatic Structures in the Solar Wind

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh32d..01k&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH32D-01

Physics

2159 Plasma Waves And Turbulence, 7815 Electrostatic Structures

Scientific paper

A large number of short (sub-millisecond) waveforms has been observed by the Waves Time Domain Sampler on Wind. Similar waveforms have been analyzed by Mangeney et al (1999). They and Lacombe et al (2002) concentrated on double layer-like waveforms having a net potential change, but this study concentrates on electron hole-like waveforms with little potential change. The waveforms are compact, having Debye-length scales. They are often shorter than the X antenna, 100 m tip to tip, and this allows determination of their size and velocity. In many cases they are associated with magnetic discontinuities, and also in many cases occur in close proximity to ion acoustic wave bursts, from which they may evolve. Like the cases analyzed by Mangeney et al, they are quite weak, leading to electric fields of a few tenths of a millivolt per meter. Their structures are generally consistent with electron holes. Lacombe, C., C.Salem, A.Mangeney, D.Hubert, C.Perche, J-L.Bougeret, P.J.Kellogg, K.Goetz, J-M.Bosqued, "Evidence for the interplanetary potential? WIND observations of electrostatic fluctuations", Annales Geophysicae, 20, 609-618, 2002 Mangeney A., C.Salem, C.Lacombe, J-L.Bougeret, C.Perche, R.Manning, P.J.Kellogg, K.Goetz, S.J.Monson, J-M.Bosqued, "WIND observations of coherent electrostatic waves in the solar wind" Annales Geophysicae 17, 307-320, 1999

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