Solar Orbiter’s first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere
Context. The induced magnetosphere of Venus is caused by the interaction of the solar wind and embedded interplanetary magnetic field with the exosphere and ionosphere of Venus. Solar Orbiter entered Venus’s magnetotail far downstream, > 70 Venus radii, of the planet and exited the magnetosphere...
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Online Access: | http://hdl.handle.net/10044/1/101272 https://doi.org/10.1051/0004-6361/202140910 |
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ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/101272 2023-05-15T17:40:00+02:00 Solar Orbiter’s first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere Volwerk, M Horbury, TS Woodham, LD Bale, SD Simon Wedlund, C Schmid, D Allen, RC Angelini, V Baumjohann, W Berger, L Edberg, NJT Evans, V Hadid, LZ Ho, GC Khotyaintsev, YV Magnes, W Maksimovic, M O’Brien, H Steller, MB Rodriguez-Pacheco, J Wimmer-Scheingruber, RF 2021-05-11 http://hdl.handle.net/10044/1/101272 https://doi.org/10.1051/0004-6361/202140910 unknown EDP Sciences Astronomy and Astrophysics: a European journal 0004-6361 http://hdl.handle.net/10044/1/101272 doi:10.1051/0004-6361/202140910 © M. Volwerk et al. 2021. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0 CC-BY Journal Article 2021 ftimperialcol https://doi.org/10.1051/0004-6361/202140910 2023-01-19T23:42:26Z Context. The induced magnetosphere of Venus is caused by the interaction of the solar wind and embedded interplanetary magnetic field with the exosphere and ionosphere of Venus. Solar Orbiter entered Venus’s magnetotail far downstream, > 70 Venus radii, of the planet and exited the magnetosphere over the north pole. This offered a unique view of the system over distances that had only been flown through before by three other missions, Mariner 10, Galileo, and BepiColombo. Aims. In this study, we study the large-scale structure and activity of the induced magnetosphere as well as the high-frequency plasma waves both in the magnetosphere and in a limited region upstream of the planet where interaction with Venus’s exosphere is expected. Methods. The large-scale structure of the magnetosphere was studied with low-pass filtered data and identified events are investigated with a minimum variance analysis as well as combined with plasma data. The high-frequency plasma waves were studied with spectral analysis. Results. We find that Venus’s magnetotail is very active during the Solar Orbiter flyby. Structures such as flux ropes and reconnection sites were encountered, in addition to a strong overdraping of the magnetic field downstream of the bow shock and planet. High-frequency plasma waves (up to six times the local proton cyclotron frequency) are observed in the magnetotail, which are identified as Doppler-shifted proton cyclotron waves, whereas in the upstream solar wind, these waves appear just below the proton cyclotron frequency (as expected) but are very patchy. The bow shock is quasi-perpendicular, however, expected mirror mode activity is not found directly behind it; instead, there is strong cyclotron wave power. This is most likely caused by the relatively low plasma-β behind the bow shock. Much further downstream, magnetic hole or mirror mode structures are identified in the magnetosheath. Article in Journal/Newspaper North Pole Imperial College London: Spiral North Pole Venus ENVELOPE(-57.842,-57.842,-61.925,-61.925) Astronomy & Astrophysics 656 A11 |
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Imperial College London: Spiral |
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ftimperialcol |
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Context. The induced magnetosphere of Venus is caused by the interaction of the solar wind and embedded interplanetary magnetic field with the exosphere and ionosphere of Venus. Solar Orbiter entered Venus’s magnetotail far downstream, > 70 Venus radii, of the planet and exited the magnetosphere over the north pole. This offered a unique view of the system over distances that had only been flown through before by three other missions, Mariner 10, Galileo, and BepiColombo. Aims. In this study, we study the large-scale structure and activity of the induced magnetosphere as well as the high-frequency plasma waves both in the magnetosphere and in a limited region upstream of the planet where interaction with Venus’s exosphere is expected. Methods. The large-scale structure of the magnetosphere was studied with low-pass filtered data and identified events are investigated with a minimum variance analysis as well as combined with plasma data. The high-frequency plasma waves were studied with spectral analysis. Results. We find that Venus’s magnetotail is very active during the Solar Orbiter flyby. Structures such as flux ropes and reconnection sites were encountered, in addition to a strong overdraping of the magnetic field downstream of the bow shock and planet. High-frequency plasma waves (up to six times the local proton cyclotron frequency) are observed in the magnetotail, which are identified as Doppler-shifted proton cyclotron waves, whereas in the upstream solar wind, these waves appear just below the proton cyclotron frequency (as expected) but are very patchy. The bow shock is quasi-perpendicular, however, expected mirror mode activity is not found directly behind it; instead, there is strong cyclotron wave power. This is most likely caused by the relatively low plasma-β behind the bow shock. Much further downstream, magnetic hole or mirror mode structures are identified in the magnetosheath. |
format |
Article in Journal/Newspaper |
author |
Volwerk, M Horbury, TS Woodham, LD Bale, SD Simon Wedlund, C Schmid, D Allen, RC Angelini, V Baumjohann, W Berger, L Edberg, NJT Evans, V Hadid, LZ Ho, GC Khotyaintsev, YV Magnes, W Maksimovic, M O’Brien, H Steller, MB Rodriguez-Pacheco, J Wimmer-Scheingruber, RF |
spellingShingle |
Volwerk, M Horbury, TS Woodham, LD Bale, SD Simon Wedlund, C Schmid, D Allen, RC Angelini, V Baumjohann, W Berger, L Edberg, NJT Evans, V Hadid, LZ Ho, GC Khotyaintsev, YV Magnes, W Maksimovic, M O’Brien, H Steller, MB Rodriguez-Pacheco, J Wimmer-Scheingruber, RF Solar Orbiter’s first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere |
author_facet |
Volwerk, M Horbury, TS Woodham, LD Bale, SD Simon Wedlund, C Schmid, D Allen, RC Angelini, V Baumjohann, W Berger, L Edberg, NJT Evans, V Hadid, LZ Ho, GC Khotyaintsev, YV Magnes, W Maksimovic, M O’Brien, H Steller, MB Rodriguez-Pacheco, J Wimmer-Scheingruber, RF |
author_sort |
Volwerk, M |
title |
Solar Orbiter’s first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere |
title_short |
Solar Orbiter’s first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere |
title_full |
Solar Orbiter’s first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere |
title_fullStr |
Solar Orbiter’s first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere |
title_full_unstemmed |
Solar Orbiter’s first Venus flyby. MAG observations of structures and waves associated with the induced Venusian magnetosphere |
title_sort |
solar orbiter’s first venus flyby. mag observations of structures and waves associated with the induced venusian magnetosphere |
publisher |
EDP Sciences |
publishDate |
2021 |
url |
http://hdl.handle.net/10044/1/101272 https://doi.org/10.1051/0004-6361/202140910 |
long_lat |
ENVELOPE(-57.842,-57.842,-61.925,-61.925) |
geographic |
North Pole Venus |
geographic_facet |
North Pole Venus |
genre |
North Pole |
genre_facet |
North Pole |
op_relation |
Astronomy and Astrophysics: a European journal 0004-6361 http://hdl.handle.net/10044/1/101272 doi:10.1051/0004-6361/202140910 |
op_rights |
© M. Volwerk et al. 2021. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1051/0004-6361/202140910 |
container_title |
Astronomy & Astrophysics |
container_volume |
656 |
container_start_page |
A11 |
_version_ |
1766140771874897920 |