Foreshock and magnetosheath waves at Uranus and Neptune studied with wavelet analysis

Autor(es)

Echer, E. ^[1]

Afiliação do(s) autor(es)

^[1] Inst Nacl Pesquisas Espaciais, BR-12201970 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Advances in Space Research; v. 44, n. 9, p. 1030-1037, NOV 2 2009.
• Citações Web of Science: 1

Resumo

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. (C) 2009 COSPAR. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 07/52533-1 - Estudo de ondas de plasma em magnetosferas planetárias
• Beneficiário: Ezequiel Echer
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores