Artigo Revisado por pares

Plasma waves in the distant magnetotail

1976; American Geophysical Union; Volume: 81; Issue: 34 Linguagem: Inglês

10.1029/ja081i034p06059

ISSN

2156-2202

Autores

D. A. Gurnett, L. A. Frank, R. P. Lepping,

Tópico(s)

Earthquake Detection and Analysis

Resumo

Journal of Geophysical Research (1896-1977)Volume 81, Issue 34 p. 6059-6071 Particles and Fields—Magnetosphere Plasma waves in the distant magnetotail D. A. Gurnett, D. A. GurnettSearch for more papers by this authorL. A. Frank, L. A. FrankSearch for more papers by this authorR. P. Lepping, R. P. LeppingSearch for more papers by this author D. A. Gurnett, D. A. GurnettSearch for more papers by this authorL. A. Frank, L. A. FrankSearch for more papers by this authorR. P. Lepping, R. P. LeppingSearch for more papers by this author First published: 1 December 1976 https://doi.org/10.1029/JA081i034p06059Citations: 317AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract In this study we identify the principal types of plasma waves which occur in the distant magnetotail, and we investigate the relationship of these waves to simultaneous plasma and magnetic field measurements made on the same spacecraft. The observations used in this study are from the Imp 8 spacecraft, which passes through the magnetotail at radial distances ranging from about 23.1 to 46.3 RE. Three principal types of plasma waves are detected by Imp 8 in the distant magnetotail: broad band electrostatic noise, whistler mode magnetic noise bursts, and electrostatic electron cyclotron waves. The electrostatic noise is a broad band emission which occurs in the frequency range from about 10 Hz to a few kilohertz and is the most intense and frequently occurring type of plasma wave detected in the distant magnetotail. This noise is found in regions with large gradients in the magnetic field near the outer boundaries of the plasma sheet and in regions with large plasma flow speeds, 10³ km s−1, directed either toward or away from the earth. The whistler mode magnetic bursts observed by Imp 8 consist of nearly monochromatic tones which last from a few seconds to a few tens of seconds. These noise bursts occur in the same region as the broad band electrostatic noise, although much less frequently, and are thought to be associated with regions carrying substantial field-aligned currents. Electrostatic electron cyclotron waves are seldom detected by Imp 8 in the distant magnetotail. Although these waves occur very infrequently, they may be of considerable importance, since they have been observed in regions near the neutral sheet when the plasma is extremely hot. References Ashour-Abdalla, M., C. F. Kennel, Convective cold upper hybrid instabilities, Magnetospheric Particles and Fields, B. M. McCormac, D. Reidel, Dordrecht, Netherlands, 1976. Aubry, M. P., M. G. Kivelson, R. L. McPherron, C. T. Russell, D. S. Colburn, Outer magnetosphere near midnight at quiet and disturbed times, J. Geophys. Res., 77, 5487, 1972. Axford, W. I., H. E. Petschek, G. L. Siscoe, Tail of the magnetosphere, J. Geophys. Res., 70, 1231, 1965. Brody, K. I., R. E. Holzer, E. J. 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E. McCune, High-frequency electrostatic waves in the magnetosphere, J. Geophys. Res., 78, 1082, 1973. Citing Literature Volume81, Issue34Space Physics1 December 1976Pages 6059-6071 ReferencesRelatedInformation

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