Magnetospheric ULF waves driven by external sources

Magnetospheric ULF waves driven by external sources

The multi-spacecraft missions (Cluster and THEMIS) observations allowed to collect large data base for Ultra Low Frequency (ULF) waves properties, their localization, and sources. Here we focused mainly on these recent results. Studies of the source and characteristics of ULF waves can help in the u...

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Бібліографічні деталі
Видавець:Головна астрономічна обсерваторія НАН України
Дата:2013
Автори: Agapitov, O.V., Cheremnykh, O.K.
Формат: Стаття
Мова:English
Опубліковано: Головна астрономічна обсерваторія НАН України 2013
Назва видання:Advances in Astronomy and Space Physics
Онлайн доступ:http://dspace.nbuv.gov.ua/handle/123456789/119421
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Цитувати:Magnetospheric ULF waves driven by external sources / O.V. Agapitov, O.K. Cheremnykh // Advances in Astronomy and Space Physics. — 2013. — Т. 3., вип. 1. — С. 12-19. — Бібліогр.: 76 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
id irk-123456789-119421
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spelling irk-123456789-1194212017-06-07T03:05:25Z Magnetospheric ULF waves driven by external sources Agapitov, O.V. Cheremnykh, O.K. The multi-spacecraft missions (Cluster and THEMIS) observations allowed to collect large data base for Ultra Low Frequency (ULF) waves properties, their localization, and sources. Here we focused mainly on these recent results. Studies of the source and characteristics of ULF waves can help in the understanding of the interaction and energy transport from the solar wind to the magnetosphere. In the presented paper peculiarities of the ULF waves are presented in depends of their generation source: surface magnetopause instabilities, magnetospheric cavity modes, and solar wind sudden impulses (SI). Permanent observations of the ULF waves involve existence of the permanent source and, as the previous studies showed, the contributions to Pc4-Pc5 ULF wave power from the external sources are larger than the contribution from internal magnetosphere sources. The Kelvin-Helmholtz instability (KHI) can generate classical ULF resonant waves with spatially localized amplitude maximum on the magnetosphere flanks. As observations show the constraint satisfaction of KHI development is quite rare. SI in the solar wind dynamic pressure generate ULF waves with different polarization and frequency close to the frequency of the local field line resonance (FLR). Wide range of temporal and amplitude characteristics of the solar wind dynamics can generate magnetosphere cavity modes and magnetosonic perturbations which penetrate through the magnetosphere and can couple with the local FLR modes. The observed dependence of ULF waves properties on their localization corresponds well to these sources and their occurrence. 2013 Article Magnetospheric ULF waves driven by external sources / O.V. Agapitov, O.K. Cheremnykh // Advances in Astronomy and Space Physics. — 2013. — Т. 3., вип. 1. — С. 12-19. — Бібліогр.: 76 назв. — англ. 2227-1481 http://dspace.nbuv.gov.ua/handle/123456789/119421 en Advances in Astronomy and Space Physics Головна астрономічна обсерваторія НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description The multi-spacecraft missions (Cluster and THEMIS) observations allowed to collect large data base for Ultra Low Frequency (ULF) waves properties, their localization, and sources. Here we focused mainly on these recent results. Studies of the source and characteristics of ULF waves can help in the understanding of the interaction and energy transport from the solar wind to the magnetosphere. In the presented paper peculiarities of the ULF waves are presented in depends of their generation source: surface magnetopause instabilities, magnetospheric cavity modes, and solar wind sudden impulses (SI). Permanent observations of the ULF waves involve existence of the permanent source and, as the previous studies showed, the contributions to Pc4-Pc5 ULF wave power from the external sources are larger than the contribution from internal magnetosphere sources. The Kelvin-Helmholtz instability (KHI) can generate classical ULF resonant waves with spatially localized amplitude maximum on the magnetosphere flanks. As observations show the constraint satisfaction of KHI development is quite rare. SI in the solar wind dynamic pressure generate ULF waves with different polarization and frequency close to the frequency of the local field line resonance (FLR). Wide range of temporal and amplitude characteristics of the solar wind dynamics can generate magnetosphere cavity modes and magnetosonic perturbations which penetrate through the magnetosphere and can couple with the local FLR modes. The observed dependence of ULF waves properties on their localization corresponds well to these sources and their occurrence.
format Article
author Agapitov, O.V.
Cheremnykh, O.K.
spellingShingle Agapitov, O.V.
Cheremnykh, O.K.
Magnetospheric ULF waves driven by external sources
Advances in Astronomy and Space Physics
author_facet Agapitov, O.V.
Cheremnykh, O.K.
author_sort Agapitov, O.V.
title Magnetospheric ULF waves driven by external sources
title_short Magnetospheric ULF waves driven by external sources
title_full Magnetospheric ULF waves driven by external sources
title_fullStr Magnetospheric ULF waves driven by external sources
title_full_unstemmed Magnetospheric ULF waves driven by external sources
title_sort magnetospheric ulf waves driven by external sources
publisher Головна астрономічна обсерваторія НАН України
publishDate 2013
url http://dspace.nbuv.gov.ua/handle/123456789/119421
citation_txt Magnetospheric ULF waves driven by external sources / O.V. Agapitov, O.K. Cheremnykh // Advances in Astronomy and Space Physics. — 2013. — Т. 3., вип. 1. — С. 12-19. — Бібліогр.: 76 назв. — англ.
series Advances in Astronomy and Space Physics
work_keys_str_mv AT agapitovov magnetosphericulfwavesdrivenbyexternalsources
AT cheremnykhok magnetosphericulfwavesdrivenbyexternalsources
first_indexed 2023-10-18T20:34:31Z
last_indexed 2023-10-18T20:34:31Z
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