Identification of the propagation mode of a solar wind wave associated with Pc5 pulsations in the magnetosphere
A case study of a magnetohydrodynamic (MHD) wave in the solar wind that is strongly correlated with a magnetospheric field line resonance observed by the SuperDARN (Super Dual Auroral Radar Network) radar at Sanae, Antarctica is presented. The data from the ACE (Advanced Composition Explorer) satell...
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2014
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Online Access: | https://doi.org/10.5194/angeo-32-1217-2014 https://doaj.org/article/60088618a8fc4a1193d8fa37d79f4be1 |
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ftdoajarticles:oai:doaj.org/article:60088618a8fc4a1193d8fa37d79f4be1 2023-05-15T13:52:04+02:00 Identification of the propagation mode of a solar wind wave associated with Pc5 pulsations in the magnetosphere A. D. M. Walker J. A. E. Stephenson 2014-10-01T00:00:00Z https://doi.org/10.5194/angeo-32-1217-2014 https://doaj.org/article/60088618a8fc4a1193d8fa37d79f4be1 EN eng Copernicus Publications https://www.ann-geophys.net/32/1217/2014/angeo-32-1217-2014.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-32-1217-2014 0992-7689 1432-0576 https://doaj.org/article/60088618a8fc4a1193d8fa37d79f4be1 Annales Geophysicae, Vol 32, Pp 1217-1221 (2014) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2014 ftdoajarticles https://doi.org/10.5194/angeo-32-1217-2014 2022-12-31T00:07:09Z A case study of a magnetohydrodynamic (MHD) wave in the solar wind that is strongly correlated with a magnetospheric field line resonance observed by the SuperDARN (Super Dual Auroral Radar Network) radar at Sanae, Antarctica is presented. The data from the ACE (Advanced Composition Explorer) satellite at the solar libration point are analysed. The data time series are bandpass filtered at the pulsation frequency and the analytic signal deduced. From these data the partition of energy between the field components is computed. It is shown that energy is equally partitioned between the kinetic energy and transverse magnetic potential energy densities. The energy flux vector is closely aligned with the background magnetic field. The transverse magnetic and velocity components are in antiphase. This is the first identification of the triggering wave as a transverse Alfvén wave which originates upstream from the space craft and is propagated to the magnetosphere to trigger the pulsation. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles SANAE ENVELOPE(-2.850,-2.850,-71.667,-71.667) Annales Geophysicae 32 10 1217 1221 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 A. D. M. Walker J. A. E. Stephenson Identification of the propagation mode of a solar wind wave associated with Pc5 pulsations in the magnetosphere |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
A case study of a magnetohydrodynamic (MHD) wave in the solar wind that is strongly correlated with a magnetospheric field line resonance observed by the SuperDARN (Super Dual Auroral Radar Network) radar at Sanae, Antarctica is presented. The data from the ACE (Advanced Composition Explorer) satellite at the solar libration point are analysed. The data time series are bandpass filtered at the pulsation frequency and the analytic signal deduced. From these data the partition of energy between the field components is computed. It is shown that energy is equally partitioned between the kinetic energy and transverse magnetic potential energy densities. The energy flux vector is closely aligned with the background magnetic field. The transverse magnetic and velocity components are in antiphase. This is the first identification of the triggering wave as a transverse Alfvén wave which originates upstream from the space craft and is propagated to the magnetosphere to trigger the pulsation. |
format |
Article in Journal/Newspaper |
author |
A. D. M. Walker J. A. E. Stephenson |
author_facet |
A. D. M. Walker J. A. E. Stephenson |
author_sort |
A. D. M. Walker |
title |
Identification of the propagation mode of a solar wind wave associated with Pc5 pulsations in the magnetosphere |
title_short |
Identification of the propagation mode of a solar wind wave associated with Pc5 pulsations in the magnetosphere |
title_full |
Identification of the propagation mode of a solar wind wave associated with Pc5 pulsations in the magnetosphere |
title_fullStr |
Identification of the propagation mode of a solar wind wave associated with Pc5 pulsations in the magnetosphere |
title_full_unstemmed |
Identification of the propagation mode of a solar wind wave associated with Pc5 pulsations in the magnetosphere |
title_sort |
identification of the propagation mode of a solar wind wave associated with pc5 pulsations in the magnetosphere |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/angeo-32-1217-2014 https://doaj.org/article/60088618a8fc4a1193d8fa37d79f4be1 |
long_lat |
ENVELOPE(-2.850,-2.850,-71.667,-71.667) |
geographic |
SANAE |
geographic_facet |
SANAE |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Annales Geophysicae, Vol 32, Pp 1217-1221 (2014) |
op_relation |
https://www.ann-geophys.net/32/1217/2014/angeo-32-1217-2014.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-32-1217-2014 0992-7689 1432-0576 https://doaj.org/article/60088618a8fc4a1193d8fa37d79f4be1 |
op_doi |
https://doi.org/10.5194/angeo-32-1217-2014 |
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Annales Geophysicae |
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32 |
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10 |
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1217 |
op_container_end_page |
1221 |
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1766256298976870400 |