Abstract
Based on the WIND observational data for the plasma waves from thermal noise receptor (TNR) working on the frequency 4–256 kHz and the solar wind and the magnetic fields, we analyze the plasma wave activities in the 60 magnetic cloud's boundary layers (BLs) and find that there are often various plasma wave activities in the BLs, which are different from those in the adjacent solar wind (SW) and the magnetic clouds (MC). The basic characteristics are that: (1) the enhancement of the Langmuir wave near the electronic plasma frequency (f pe) is a dominant wave activity, which occupies 75% investigated samples; (2) the events enhanced both in the langmuir and ion acustic (f<fpe) waves are about 60% of investigated samples; (3) broadband, continuous enhancement events in the plasma wave activities were observed in the whole frequency band of TNR, and about 30% of the 60 samples, however, were not observed in the SW and the MC investigated events; (4) although the ratio of the temperatures between the electon and proton, T e/T p⩽1, the ion caustic wave enhancement activities are still often observed in the BLs, which makes it difficult to explain them by the traditional plasma theory. New results reported in this paper further show that the magnetic cloud's BL is an important dynamic structure, which could provide useful diagnosis for understanding the cloud's BL physics and could expand a space developing space plasma wave theory.
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Wei, F. S., Liu, R., Fan, Q. et al., Identification of the magnetic cloud boundary layers. J Geophys Res, 2003, 108(nA6): 1263. doi: 10.1029/2002JA009511.
Wei, F. S., Liu, R., Feng, X. et al., Magnetic structures inside bound-ary layers of magnetic clouds. Geophys Res Lett, 2003, 30(n24): 2283. doi:10.1029/2003GL018116.
Wei Fengsi, Feng Xueshang, Yang Fang et al., Plasma structures inside boundary layers of magnetic clouds, Chinese Science Bullentin, 2004, 49 (23): 2533–2537.
Moullard, O., Burgess D., Salem C. et al., Whistler waves, Langmuir waves and single loss cone electron distributions inside a magnetic cloud: Observations, J. Geophys. Res., 2001, 106(nA5): 8301–8313.
Gurnett, D. A., Anderson R. R., Scarf F. L. et al., Initial results from the ISSE-1 and 2 plasma wave investigation, Space Sci. Rev., 1979, 23: 103–122.
Farrell, W. M., Fitzenreiter R. J., Kaiser M. L. et al., Continuum emission and broadband electrostatic noise at the low latitude boundary layer: A diagnostic of boundary layer dynamics, Geophys. Res. Lett., 2002, 29(n12): 1580. doi: 10. 1029/2000GL012799
Burlaga, L., Lepping R., Weber R. et al., Interplanetary particles and Fields, November 22 to December 6, 1977: Helios, Voyager and Imp observations Between 0.6 and 1.6 AU, J. Geophys. Res., 1980, 85(nA5): 2227–2242.
Gurnet, D. A., Waves and Instabilities. In Schwenn R., Marsch E., eds. physics of the Inner Heliosphere II, Berlin Heidelberg: Spring-Veriag, 1990
Lin, N., Kellogg P. J., MacDowall R. J. et al., Observations of plasma waves in magnetic holes, Geophys. Res. Lett., 1995, 22: 3417–3420.
MacDowall, R. J., Hess R. A., Lin N. et al., Ulysses spacecraft observations of radio and plasma waves: 1991–1995, Astron & Astrophys. 1996, 316: 396–405.
Osherovich, V., Burlaga L. F., Magnetic clouds In Coronal Mass Ejections, Geophysical Monograph, 99: AGU, 1997, 157–168.
Mangeney, A., Salem C., Lacombe, C. et al., WIND Observations of coherent electrostatic waves in the solar wind, Ann. Geophysicate, 1999, 17: 307–320.
Bougeret, J. −L., Kaiser, M. L., Kellogg, P. J. et al., Waves: the radio and plasma wave investigation on the wind spacecraft, Space Sci. Rev., 1995, 71: 231–263.
Farrell, W. M., Desch, M. D., Kaiser, M. L. et al., The dominance of electron plasma waves near the reconnection X-line region, Geophys. Res. Lett., 2002, 29: 1902.
Deng, X. H., Matsumoto, H., Rapid magnetic reconnection in the earth's Magnetosphere generated by whistler waves, Nature, 2001, 410: 557–559.
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Wei, F., Zhong, D., Feng, X. et al. WIND observations of plasma waves inside the magnetic cloud boundary layers. Chin.Sci.Bull. 50, 2051–2056 (2005). https://doi.org/10.1007/BF03322800
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DOI: https://doi.org/10.1007/BF03322800