Foreshock and magnetosheath waves at Uranus and Neptune studied with wavelet analysis |
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Authors: | E Echer |
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Institution: | aInstituto Nacional de Pesquisas Espaciais (INPE), POB: 515 – ZIP: 12201-970 São José dos Campos, SP, Brazil |
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Abstract: | Foreshock and magnetosheath waves in Uranus and Neptune magnetospheres are studied in this work with wavelet analysis. In order to conduct this study, Voyager-2 magnetometer 3-s averaged data are used. The Morlet wavelet transform is applied to the magnetic field vector data. Waves present in the magnetosheath and foreshock regions are highly non-stationary, showing large amplitude variations. It was found that the dominant periods of these waves are longer than the H+ cyclotron period. Overall, high frequency waves are seen near the bow shock crossing and low frequency oscillations near the magnetopause crossing. It can be concluded that non-stationary foreshock and magnetosheath planetary waves can be well characterized with wavelet analysis. |
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Keywords: | Foreshock waves Magnetosheath waves Uranus magnetosphere Neptune magnetosphere Solar wind Wavelet analysis |
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