ULF Waves Associated with Solar Wind Deceleration in the Earth＇s Foreshock  

作　　者：符慧山 曹晋滨 杨彪 Lucek E Reme H Dandouras I 

机构地区：[1]State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Beijing 100190 [2]Graduate University of Chinese Academy of Sciences, Beijing 100049 [3]Beijing University of Aeronautics and Astronautics, Beijing 100190 [4]Institute of Space Physics and Applied Technology, Peking University, Beijing 100871 [5]Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2BZ, UK [6]Centre d'Etude Spatiale des Rayonnements, 31028, Toulouse, France

出　　处：《Chinese Physics Letters》2009年第11期258-261,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 40931054 and 40523006, the National Basic Research Program of China under Grant No 2006CB806305, the National High-Tech Research and Development Program of China under Grant No 2008AA12A216, and the Specialized Research Fund for State Key Laboratories.

摘　　要：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^-4 km^-1, In the solar wind frame, the frequency of waves becomes - 9.39 mHz 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.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^-4 km^-1, In the solar wind frame, the frequency of waves becomes - 9.39 mHz 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.

关 键 词：Plasma physics Environmental and Earth science Astrophysics and astroparticles 

分 类 号：P353.8[天文地球—空间物理学] P433[天文地球—地球物理学]