| GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS |
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ULF Waves Associated with Solar Wind Deceleration in the Earth's Foreshock |
| FU Hui-Shan1,2, CAO Jin-Bin3,1, YANG Biao4, Lucek E5, Rème H6, Dandouras I6 |
| 1State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Beijing 1001902Graduate University of Chinese Academy of Sciences, Beijing 1000493Beijing University of Aeronautics and Astronautics, Beijing 1001904Institute of Space Physics and Applied Technology, Peking University, Beijing 1008715Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2BZ, UK6Centre d'Etude Spatiale des Rayonnements, 31028, Toulouse, France |
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| Cite this article: |
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FU Hui-Shan, CAO Jin-Bin, YANG Biao et al 2009 Chin. Phys. Lett. 26 119402 |
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Abstract Characteristics of ULF waves associated with the solar wind deceleration in the Earth's foreshock on 6-7 April 2003 is studied using the wave telescope technique. In the satellite frame, the ULF waves are the left-handed polarized and quasi anti-parallel propagating mode, with a power peak at about 18.63mHz. The wave vector in the GSE coordinates is estimated to be k = (-4.29, 2.28, 1.21)×10-4km-1. In the solar wind frame, the frequency of waves becomes -9.39mHz after the Doppler shift correction. The propagation direction of the waves is thus reversed and correspondingly the polarization of the waves becomes right-handed. The above-mentioned characteristics of the ULF waves in the solar wind frame indicate that the ULF waves associated with the solar wind deceleration are the Alfven-whistler waves, which have been frequently reported in both the observations and computer simulations.
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| Keywords:
94.05.Pt
94.30.Cq
94.30.Va
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Received: 20 July 2009
Published: 30 October 2009
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| PACS: |
94.05.Pt
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(Wave/wave, wave/particle interactions)
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94.30.cq
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(MHD waves, plasma waves, and instabilities)
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94.30.Va
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(Magnetosphere interactions)
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