Equatorward Moving Auroral Arcs Associated with Impulse-Excited Field Line Resonance
The theory of equatorward moving east-west elongated auroral arcs associated with field line resonance (FLR) has been proposed for decades. However, confirming this theory requires in-situ observations of FLR within the magnetosphere and simultaneous all-sky imager observations of equatorward moving...
Published in: | Universe |
---|---|
Main Authors: | , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2023
|
Subjects: | |
Online Access: | https://doi.org/10.3390/universe9060249 |
id |
ftmdpi:oai:mdpi.com:/2218-1997/9/6/249/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2218-1997/9/6/249/ 2023-08-20T04:00:30+02:00 Equatorward Moving Auroral Arcs Associated with Impulse-Excited Field Line Resonance Huayu Zhao Ying Liu Huigen Yang Qiugang Zong Zejun Hu Xuzhi Zhou Yongfu Wang Jicheng Sun Bin Li 2023-05-25 application/pdf https://doi.org/10.3390/universe9060249 EN eng Multidisciplinary Digital Publishing Institute Space Science https://dx.doi.org/10.3390/universe9060249 https://creativecommons.org/licenses/by/4.0/ Universe; Volume 9; Issue 6; Pages: 249 equatorward moving aurora solar wind dynamic pressure pulse field line resonance Text 2023 ftmdpi https://doi.org/10.3390/universe9060249 2023-08-01T10:12:59Z The theory of equatorward moving east-west elongated auroral arcs associated with field line resonance (FLR) has been proposed for decades. However, confirming this theory requires in-situ observations of FLR within the magnetosphere and simultaneous all-sky imager observations of equatorward moving auroral arcs near satellite footpoints. In this study, we present the first observations of multiple equatorward moving auroral arcs related to impulse-excited FLR, using datasets from the WIND, Geotail satellites, and an all-sky imager at China’s Zhongshan Station (ZHS) in Antarctica. In the presented event, the ultra-low-frequency waves associated with solar wind dynamic pressure pulse was mainly toroidal mode, which is consistent with the theory that the toroidal mode waves usually related with external source. The all-sky imager located in Zhongshan station recorded several equatorward moving auroral arcs, followed by reverse propagating ones. The latitudinal width of the equatorward moving auroral arcs was on the order of 25 km and had an average equatorward propagation of ~0.37 km/s, which is very similar to the value from previous work. To better illustrate the observed evolution of auroral arcs related with the FLRs we proposed a simple model to evaluate the FACs induced by the FLRs in different latitudes. The latitudinal distribution evolution of FACs agrees well with the ground-based optical observations. Text Antarc* Antarctica MDPI Open Access Publishing Zhongshan ENVELOPE(76.371,76.371,-69.373,-69.373) Zhongshan Station ENVELOPE(76.371,76.371,-69.373,-69.373) Universe 9 6 249 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
equatorward moving aurora solar wind dynamic pressure pulse field line resonance |
spellingShingle |
equatorward moving aurora solar wind dynamic pressure pulse field line resonance Huayu Zhao Ying Liu Huigen Yang Qiugang Zong Zejun Hu Xuzhi Zhou Yongfu Wang Jicheng Sun Bin Li Equatorward Moving Auroral Arcs Associated with Impulse-Excited Field Line Resonance |
topic_facet |
equatorward moving aurora solar wind dynamic pressure pulse field line resonance |
description |
The theory of equatorward moving east-west elongated auroral arcs associated with field line resonance (FLR) has been proposed for decades. However, confirming this theory requires in-situ observations of FLR within the magnetosphere and simultaneous all-sky imager observations of equatorward moving auroral arcs near satellite footpoints. In this study, we present the first observations of multiple equatorward moving auroral arcs related to impulse-excited FLR, using datasets from the WIND, Geotail satellites, and an all-sky imager at China’s Zhongshan Station (ZHS) in Antarctica. In the presented event, the ultra-low-frequency waves associated with solar wind dynamic pressure pulse was mainly toroidal mode, which is consistent with the theory that the toroidal mode waves usually related with external source. The all-sky imager located in Zhongshan station recorded several equatorward moving auroral arcs, followed by reverse propagating ones. The latitudinal width of the equatorward moving auroral arcs was on the order of 25 km and had an average equatorward propagation of ~0.37 km/s, which is very similar to the value from previous work. To better illustrate the observed evolution of auroral arcs related with the FLRs we proposed a simple model to evaluate the FACs induced by the FLRs in different latitudes. The latitudinal distribution evolution of FACs agrees well with the ground-based optical observations. |
format |
Text |
author |
Huayu Zhao Ying Liu Huigen Yang Qiugang Zong Zejun Hu Xuzhi Zhou Yongfu Wang Jicheng Sun Bin Li |
author_facet |
Huayu Zhao Ying Liu Huigen Yang Qiugang Zong Zejun Hu Xuzhi Zhou Yongfu Wang Jicheng Sun Bin Li |
author_sort |
Huayu Zhao |
title |
Equatorward Moving Auroral Arcs Associated with Impulse-Excited Field Line Resonance |
title_short |
Equatorward Moving Auroral Arcs Associated with Impulse-Excited Field Line Resonance |
title_full |
Equatorward Moving Auroral Arcs Associated with Impulse-Excited Field Line Resonance |
title_fullStr |
Equatorward Moving Auroral Arcs Associated with Impulse-Excited Field Line Resonance |
title_full_unstemmed |
Equatorward Moving Auroral Arcs Associated with Impulse-Excited Field Line Resonance |
title_sort |
equatorward moving auroral arcs associated with impulse-excited field line resonance |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/universe9060249 |
long_lat |
ENVELOPE(76.371,76.371,-69.373,-69.373) ENVELOPE(76.371,76.371,-69.373,-69.373) |
geographic |
Zhongshan Zhongshan Station |
geographic_facet |
Zhongshan Zhongshan Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Universe; Volume 9; Issue 6; Pages: 249 |
op_relation |
Space Science https://dx.doi.org/10.3390/universe9060249 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/universe9060249 |
container_title |
Universe |
container_volume |
9 |
container_issue |
6 |
container_start_page |
249 |
_version_ |
1774718544490004480 |