Polarization in aurorae: A new dimension for space environments studies
International audience The polarization of emission lines is a noteworthy observational parameter in astronomy. However, it has never been detected without ambiguity in planetary upper atmospheres. Theoretical considerations have suggested that the polarization of the thermospheric oxygen red line (...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2008
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00363722 https://hal-insu.archives-ouvertes.fr/insu-00363722/document https://hal-insu.archives-ouvertes.fr/insu-00363722/file/2007GL033006.pdf https://doi.org/10.1029/2007GL033006 |
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[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Lilensten, Jean Moen, Joran Barthelemy, Mathieu Thissen, Roland Simon, Cyril Lorentzen, D. A. Dutuit, Odile Amblard, Pierre-Olivier Sigernes, Fred Polarization in aurorae: A new dimension for space environments studies |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The polarization of emission lines is a noteworthy observational parameter in astronomy. However, it has never been detected without ambiguity in planetary upper atmospheres. Theoretical considerations have suggested that the polarization of the thermospheric oxygen red line (630 nm) could exist in the polar cap region. We present here its first successful measurement at Svalbard in January 2007, during active geophysical conditions. We assign its origin and variability to complementary effects between permanent low-energy electron precipitation and sporadic auroral events. Implications in physics, geophysics and planetary science are foreseen. In physics, it raises the question of the polarization of a forbidden transition by electron impact which is still unknown. In geophysics, it provides a new parameter to constrain the thermospheric models. In planetary science, it makes it possible to derive the local configuration of the magnetic fields. It therefore opens new perspectives for future space missions towards other planets. |
author2 |
Laboratoire de Planétologie de Grenoble (LPG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Physics Oslo Faculty of Mathematics and Natural Sciences Oslo University of Oslo (UiO)-University of Oslo (UiO) European Space Research and Technology Centre (ESTEC) European Space Agency (ESA) Arctic Geophysics Research The University Centre in Svalbard (UNIS) GIPSA - Signal Images Physique (GIPSA-SIGMAPHY) Département Images et Signal (GIPSA-DIS) Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Lilensten, Jean Moen, Joran Barthelemy, Mathieu Thissen, Roland Simon, Cyril Lorentzen, D. A. Dutuit, Odile Amblard, Pierre-Olivier Sigernes, Fred |
author_facet |
Lilensten, Jean Moen, Joran Barthelemy, Mathieu Thissen, Roland Simon, Cyril Lorentzen, D. A. Dutuit, Odile Amblard, Pierre-Olivier Sigernes, Fred |
author_sort |
Lilensten, Jean |
title |
Polarization in aurorae: A new dimension for space environments studies |
title_short |
Polarization in aurorae: A new dimension for space environments studies |
title_full |
Polarization in aurorae: A new dimension for space environments studies |
title_fullStr |
Polarization in aurorae: A new dimension for space environments studies |
title_full_unstemmed |
Polarization in aurorae: A new dimension for space environments studies |
title_sort |
polarization in aurorae: a new dimension for space environments studies |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00363722 https://hal-insu.archives-ouvertes.fr/insu-00363722/document https://hal-insu.archives-ouvertes.fr/insu-00363722/file/2007GL033006.pdf https://doi.org/10.1029/2007GL033006 |
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Svalbard |
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Svalbard |
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Svalbard |
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Svalbard |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-00363722 Geophysical Research Letters, American Geophysical Union, 2008, 35, pp.L08804. ⟨10.1029/2007GL033006⟩ |
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info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2007GL033006 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
8 |
_version_ |
1766213174926770176 |
spelling |
ftccsdartic:oai:HAL:insu-00363722v1 2023-05-15T18:29:47+02:00 Polarization in aurorae: A new dimension for space environments studies Lilensten, Jean Moen, Joran Barthelemy, Mathieu Thissen, Roland Simon, Cyril Lorentzen, D. A. Dutuit, Odile Amblard, Pierre-Olivier Sigernes, Fred Laboratoire de Planétologie de Grenoble (LPG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Physics Oslo Faculty of Mathematics and Natural Sciences Oslo University of Oslo (UiO)-University of Oslo (UiO) European Space Research and Technology Centre (ESTEC) European Space Agency (ESA) Arctic Geophysics Research The University Centre in Svalbard (UNIS) GIPSA - Signal Images Physique (GIPSA-SIGMAPHY) Département Images et Signal (GIPSA-DIS) Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab) Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) 2008 https://hal-insu.archives-ouvertes.fr/insu-00363722 https://hal-insu.archives-ouvertes.fr/insu-00363722/document https://hal-insu.archives-ouvertes.fr/insu-00363722/file/2007GL033006.pdf https://doi.org/10.1029/2007GL033006 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GL033006 insu-00363722 https://hal-insu.archives-ouvertes.fr/insu-00363722 https://hal-insu.archives-ouvertes.fr/insu-00363722/document https://hal-insu.archives-ouvertes.fr/insu-00363722/file/2007GL033006.pdf doi:10.1029/2007GL033006 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-00363722 Geophysical Research Letters, American Geophysical Union, 2008, 35, pp.L08804. ⟨10.1029/2007GL033006⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1029/2007GL033006 2021-10-23T23:56:53Z International audience The polarization of emission lines is a noteworthy observational parameter in astronomy. However, it has never been detected without ambiguity in planetary upper atmospheres. Theoretical considerations have suggested that the polarization of the thermospheric oxygen red line (630 nm) could exist in the polar cap region. We present here its first successful measurement at Svalbard in January 2007, during active geophysical conditions. We assign its origin and variability to complementary effects between permanent low-energy electron precipitation and sporadic auroral events. Implications in physics, geophysics and planetary science are foreseen. In physics, it raises the question of the polarization of a forbidden transition by electron impact which is still unknown. In geophysics, it provides a new parameter to constrain the thermospheric models. In planetary science, it makes it possible to derive the local configuration of the magnetic fields. It therefore opens new perspectives for future space missions towards other planets. Article in Journal/Newspaper Svalbard Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Svalbard Geophysical Research Letters 35 8 |