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

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...

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Bibliographic Details
Published in:Chinese physics letters 2009-11, Vol.26 (11), p.119402-119402
Main Authors: Hui-Shan, Fu, Jin-Bin, Cao, Biao, Yang, Lucek, E, Rème, H, Dandouras, I
Format: Article
Language:English
Subjects:
Deceleration
Doppler effect
Earth
Frames
Solar power generation
Solar wind
ULF
Wave propagation
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Summary: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 18.63 mHz. The wave vector in the GSE coordinates is estimated to be Delta *k = (-4.29, 2.28, 1.21) X 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.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/26/11/119402