Features of stable diffuse arcs observed by means of auroral tomography
International audience In this paper we study the spatial distribution of optical volume emission rates and peculiarities of the luminosity intensity within weak diffuse auroral arcs recovered by means of auroral tomography. The tomographic images are obtained from sets of scanning multi-channel pho...
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ftinsu:oai:HAL:hal-00318322v1 2023-11-12T04:20:27+01:00 Features of stable diffuse arcs observed by means of auroral tomography Dashkevich, Zh. V. Ivanov, V. E. Khudukon, B. Z. Polar Geophysical Institute of Russian Academy of Sciences (PGI) Russian Academy of Sciences Moscow (RAS) 2007-06-04 https://hal.science/hal-00318322 https://hal.science/hal-00318322/document https://hal.science/hal-00318322/file/angeo-25-1131-2007.pdf en eng HAL CCSD European Geosciences Union hal-00318322 https://hal.science/hal-00318322 https://hal.science/hal-00318322/document https://hal.science/hal-00318322/file/angeo-25-1131-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318322 Annales Geophysicae, 2007, 25 (5), pp.1131-1139 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftinsu 2023-10-25T16:24:59Z International audience In this paper we study the spatial distribution of optical volume emission rates and peculiarities of the luminosity intensity within weak diffuse auroral arcs recovered by means of auroral tomography. The tomographic images are obtained from sets of scanning multi-channel photometer data obtained in February 1999 on the Kola Peninsula in Russia at three sites of a chain extending 226 km along the geomagnetic meridian. The 427.8- and 557.7-nm emissions of a 15-s time resolution observed within one hour during low geomagnetic activity are analyzed. We found that the intensity profile of an individual arc along the geomagnetic meridian has an inverted-V-shape. The luminosity maximum altitude decrease by 4?14 km at about 140 km distance in the south-north direction can be observed during two or more diffuse arcs. The parameters of the precipitating electron flux are obtained from an integral equation, which determines the best relationship between the 427.8-nm intensity height profile and an arbitrary particle energy spectrum. A dimensionless function of the energy dissipation is used as the core in the integral equation. The estimated average energy of electron flux, which generated the isolated diffuse arc, is 1?2 keV higher in the central part of the arc in comparison to values at its borders. Article in Journal/Newspaper kola peninsula Institut national des sciences de l'Univers: HAL-INSU Kola Peninsula |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Dashkevich, Zh. V. Ivanov, V. E. Khudukon, B. Z. Features of stable diffuse arcs observed by means of auroral tomography |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience In this paper we study the spatial distribution of optical volume emission rates and peculiarities of the luminosity intensity within weak diffuse auroral arcs recovered by means of auroral tomography. The tomographic images are obtained from sets of scanning multi-channel photometer data obtained in February 1999 on the Kola Peninsula in Russia at three sites of a chain extending 226 km along the geomagnetic meridian. The 427.8- and 557.7-nm emissions of a 15-s time resolution observed within one hour during low geomagnetic activity are analyzed. We found that the intensity profile of an individual arc along the geomagnetic meridian has an inverted-V-shape. The luminosity maximum altitude decrease by 4?14 km at about 140 km distance in the south-north direction can be observed during two or more diffuse arcs. The parameters of the precipitating electron flux are obtained from an integral equation, which determines the best relationship between the 427.8-nm intensity height profile and an arbitrary particle energy spectrum. A dimensionless function of the energy dissipation is used as the core in the integral equation. The estimated average energy of electron flux, which generated the isolated diffuse arc, is 1?2 keV higher in the central part of the arc in comparison to values at its borders. |
author2 |
Polar Geophysical Institute of Russian Academy of Sciences (PGI) Russian Academy of Sciences Moscow (RAS) |
format |
Article in Journal/Newspaper |
author |
Dashkevich, Zh. V. Ivanov, V. E. Khudukon, B. Z. |
author_facet |
Dashkevich, Zh. V. Ivanov, V. E. Khudukon, B. Z. |
author_sort |
Dashkevich, Zh. V. |
title |
Features of stable diffuse arcs observed by means of auroral tomography |
title_short |
Features of stable diffuse arcs observed by means of auroral tomography |
title_full |
Features of stable diffuse arcs observed by means of auroral tomography |
title_fullStr |
Features of stable diffuse arcs observed by means of auroral tomography |
title_full_unstemmed |
Features of stable diffuse arcs observed by means of auroral tomography |
title_sort |
features of stable diffuse arcs observed by means of auroral tomography |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00318322 https://hal.science/hal-00318322/document https://hal.science/hal-00318322/file/angeo-25-1131-2007.pdf |
geographic |
Kola Peninsula |
geographic_facet |
Kola Peninsula |
genre |
kola peninsula |
genre_facet |
kola peninsula |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318322 Annales Geophysicae, 2007, 25 (5), pp.1131-1139 |
op_relation |
hal-00318322 https://hal.science/hal-00318322 https://hal.science/hal-00318322/document https://hal.science/hal-00318322/file/angeo-25-1131-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782336396344688640 |