Heavy Ion Flows in the Upper Ionosphere of the Venusian North Pole
International audience We investigate the heavy ion density and velocity in the Venusian upper ionosphere near the North Pole, using the Ion Mass Analyzer, a part of the Analyzer of Space Plasmas and Energetic Atoms 4, together with the magnetic field instruments on Venus Express. The measurements w...
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Online Access: | https://insu.hal.science/insu-03674435 https://insu.hal.science/insu-03674435/document https://insu.hal.science/insu-03674435/file/JGR%20Space%20Physics%20-%202019%20-%20Persson%20-%20Heavy%20Ion%20Flows%20in%20the%20Upper%20Ionosphere%20of%20the%20Venusian%20North%20Pole.pdf https://doi.org/10.1029/2018JA026271 |
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ftinsu:oai:HAL:insu-03674435v1 2023-12-17T10:47:13+01:00 Heavy Ion Flows in the Upper Ionosphere of the Venusian North Pole Persson, M. Futaana, Y. Nilsson, H. Stenberg Wieser, G. Hamrin, M. Fedorov, A. Zhang, T. L. Barabash, S. Institut de recherche en astrophysique et planétologie (IRAP) Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 2019 https://insu.hal.science/insu-03674435 https://insu.hal.science/insu-03674435/document https://insu.hal.science/insu-03674435/file/JGR%20Space%20Physics%20-%202019%20-%20Persson%20-%20Heavy%20Ion%20Flows%20in%20the%20Upper%20Ionosphere%20of%20the%20Venusian%20North%20Pole.pdf https://doi.org/10.1029/2018JA026271 en eng HAL CCSD American Geophysical Union/Wiley info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JA026271 insu-03674435 https://insu.hal.science/insu-03674435 https://insu.hal.science/insu-03674435/document https://insu.hal.science/insu-03674435/file/JGR%20Space%20Physics%20-%202019%20-%20Persson%20-%20Heavy%20Ion%20Flows%20in%20the%20Upper%20Ionosphere%20of%20the%20Venusian%20North%20Pole.pdf BIBCODE: 2019JGRA.124.4597P doi:10.1029/2018JA026271 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9380 EISSN: 2169-9402 Journal of Geophysical Research Space Physics https://insu.hal.science/insu-03674435 Journal of Geophysical Research Space Physics, 2019, 124, pp.4597-4607. ⟨10.1029/2018JA026271⟩ Venus ionosphere nightward flow trans-terminator flow ion dynamics dusk-to-dawn flow pattern Venus North Pole [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2019 ftinsu https://doi.org/10.1029/2018JA026271 2023-11-22T17:31:21Z International audience We investigate the heavy ion density and velocity in the Venusian upper ionosphere near the North Pole, using the Ion Mass Analyzer, a part of the Analyzer of Space Plasmas and Energetic Atoms 4, together with the magnetic field instruments on Venus Express. The measurements were made during June-July 2014, covering the aerobraking campaign with lowered altitude measurements ( 130 km). The plasma scale heights are 15 km below 150-km altitude and 200 km at 150-400-km altitude. A clear trend of dusk-to-dawn heavy ion flow across the polar ionosphere was found, with speeds of 2-10 km/s. In addition, the flow has a significant downward radial velocity component. The flow pattern does not depend on the interplanetary magnetic field directions nor the ionospheric magnetization states. Instead, we suggest a thermal pressure gradient between the equatorial and polar terminator regions, induced by the decrease in density between the regions, as the dominant mechanism driving the ion flow. Article in Journal/Newspaper North Pole Institut national des sciences de l'Univers: HAL-INSU North Pole Venus ENVELOPE(-57.842,-57.842,-61.925,-61.925) Journal of Geophysical Research: Space Physics 124 6 4597 4607 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Venus ionosphere nightward flow trans-terminator flow ion dynamics dusk-to-dawn flow pattern Venus North Pole [SDU]Sciences of the Universe [physics] |
spellingShingle |
Venus ionosphere nightward flow trans-terminator flow ion dynamics dusk-to-dawn flow pattern Venus North Pole [SDU]Sciences of the Universe [physics] Persson, M. Futaana, Y. Nilsson, H. Stenberg Wieser, G. Hamrin, M. Fedorov, A. Zhang, T. L. Barabash, S. Heavy Ion Flows in the Upper Ionosphere of the Venusian North Pole |
topic_facet |
Venus ionosphere nightward flow trans-terminator flow ion dynamics dusk-to-dawn flow pattern Venus North Pole [SDU]Sciences of the Universe [physics] |
description |
International audience We investigate the heavy ion density and velocity in the Venusian upper ionosphere near the North Pole, using the Ion Mass Analyzer, a part of the Analyzer of Space Plasmas and Energetic Atoms 4, together with the magnetic field instruments on Venus Express. The measurements were made during June-July 2014, covering the aerobraking campaign with lowered altitude measurements ( 130 km). The plasma scale heights are 15 km below 150-km altitude and 200 km at 150-400-km altitude. A clear trend of dusk-to-dawn heavy ion flow across the polar ionosphere was found, with speeds of 2-10 km/s. In addition, the flow has a significant downward radial velocity component. The flow pattern does not depend on the interplanetary magnetic field directions nor the ionospheric magnetization states. Instead, we suggest a thermal pressure gradient between the equatorial and polar terminator regions, induced by the decrease in density between the regions, as the dominant mechanism driving the ion flow. |
author2 |
Institut de recherche en astrophysique et planétologie (IRAP) Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Persson, M. Futaana, Y. Nilsson, H. Stenberg Wieser, G. Hamrin, M. Fedorov, A. Zhang, T. L. Barabash, S. |
author_facet |
Persson, M. Futaana, Y. Nilsson, H. Stenberg Wieser, G. Hamrin, M. Fedorov, A. Zhang, T. L. Barabash, S. |
author_sort |
Persson, M. |
title |
Heavy Ion Flows in the Upper Ionosphere of the Venusian North Pole |
title_short |
Heavy Ion Flows in the Upper Ionosphere of the Venusian North Pole |
title_full |
Heavy Ion Flows in the Upper Ionosphere of the Venusian North Pole |
title_fullStr |
Heavy Ion Flows in the Upper Ionosphere of the Venusian North Pole |
title_full_unstemmed |
Heavy Ion Flows in the Upper Ionosphere of the Venusian North Pole |
title_sort |
heavy ion flows in the upper ionosphere of the venusian north pole |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://insu.hal.science/insu-03674435 https://insu.hal.science/insu-03674435/document https://insu.hal.science/insu-03674435/file/JGR%20Space%20Physics%20-%202019%20-%20Persson%20-%20Heavy%20Ion%20Flows%20in%20the%20Upper%20Ionosphere%20of%20the%20Venusian%20North%20Pole.pdf https://doi.org/10.1029/2018JA026271 |
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_source |
ISSN: 2169-9380 EISSN: 2169-9402 Journal of Geophysical Research Space Physics https://insu.hal.science/insu-03674435 Journal of Geophysical Research Space Physics, 2019, 124, pp.4597-4607. ⟨10.1029/2018JA026271⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JA026271 insu-03674435 https://insu.hal.science/insu-03674435 https://insu.hal.science/insu-03674435/document https://insu.hal.science/insu-03674435/file/JGR%20Space%20Physics%20-%202019%20-%20Persson%20-%20Heavy%20Ion%20Flows%20in%20the%20Upper%20Ionosphere%20of%20the%20Venusian%20North%20Pole.pdf BIBCODE: 2019JGRA.124.4597P doi:10.1029/2018JA026271 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2018JA026271 |
container_title |
Journal of Geophysical Research: Space Physics |
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124 |
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6 |
container_start_page |
4597 |
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