Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves
We report a simultaneous observation of two band electromagnetic ion cyclotron (EMIC) waves and toroidal Alfvén waves by the Van Allen Probe mission. Through wave frequency analyses, the mass density ρ is found to be locally peaked at the magnetic equator. Perpendicular fluxes of ions (< 100 eV)...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Science Press
2021-01-01
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| Series: | Earth and Planetary Physics |
| Subjects: | |
| Online Access: | http://www.eppcgs.org/article/doi/10.26464/epp2021008?pageType=en |
| _version_ | 1818048859180367872 |
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| author | ZuXiang Xue ZhiGang Yuan XiongDong Yu ShiYong Huang Zheng Qiao |
| author_facet | ZuXiang Xue ZhiGang Yuan XiongDong Yu ShiYong Huang Zheng Qiao |
| author_sort | ZuXiang Xue |
| collection | DOAJ |
| description | We report a simultaneous observation of two band electromagnetic ion cyclotron (EMIC) waves and toroidal Alfvén waves by the Van Allen Probe mission. Through wave frequency analyses, the mass density ρ is found to be locally peaked at the magnetic equator. Perpendicular fluxes of ions (< 100 eV) increase simultaneously with the appearances of EMIC waves, indicating a heating of these ions by EMIC waves. In addition, the measured ion distributions also support the equatorial peak formation, which accords with the result of the frequency analyses. The formation of local mass density peaks at the equator should be due to enhancements of equatorial ion concentrations, which are triggered by EMIC waves’ perpendicular heating on low energy ions. |
| first_indexed | 2024-12-10T10:28:22Z |
| format | Article |
| id | doaj.art-d7c5c85230454f098c3ea68ff50fdab8 |
| institution | Directory Open Access Journal |
| issn | 2096-3955 |
| language | English |
| last_indexed | 2024-12-10T10:28:22Z |
| publishDate | 2021-01-01 |
| publisher | Science Press |
| record_format | Article |
| series | Earth and Planetary Physics |
| spelling | doaj.art-d7c5c85230454f098c3ea68ff50fdab82022-12-22T01:52:39ZengScience PressEarth and Planetary Physics2096-39552021-01-0151324110.26464/epp2021008RA213yuanzhigang-FFormation of the mass density peak at the magnetospheric equator triggered by EMIC wavesZuXiang Xue0ZhiGang Yuan1XiongDong Yu2ShiYong Huang3Zheng Qiao4School of Electronic Information, Wuhan University, Wuhan 420072, ChinaSchool of Electronic Information, Wuhan University, Wuhan 420072, ChinaSchool of Electronic Information, Wuhan University, Wuhan 420072, ChinaSchool of Electronic Information, Wuhan University, Wuhan 420072, ChinaSchool of Electronic Information, Wuhan University, Wuhan 420072, ChinaWe report a simultaneous observation of two band electromagnetic ion cyclotron (EMIC) waves and toroidal Alfvén waves by the Van Allen Probe mission. Through wave frequency analyses, the mass density ρ is found to be locally peaked at the magnetic equator. Perpendicular fluxes of ions (< 100 eV) increase simultaneously with the appearances of EMIC waves, indicating a heating of these ions by EMIC waves. In addition, the measured ion distributions also support the equatorial peak formation, which accords with the result of the frequency analyses. The formation of local mass density peaks at the equator should be due to enhancements of equatorial ion concentrations, which are triggered by EMIC waves’ perpendicular heating on low energy ions.http://www.eppcgs.org/article/doi/10.26464/epp2021008?pageType=entoroidal alfvén wavesemic wavesmagnetoseismologyequatorial mass density peak |
| spellingShingle | ZuXiang Xue ZhiGang Yuan XiongDong Yu ShiYong Huang Zheng Qiao Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves Earth and Planetary Physics toroidal alfvén waves emic waves magnetoseismology equatorial mass density peak |
| title | Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves |
| title_full | Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves |
| title_fullStr | Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves |
| title_full_unstemmed | Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves |
| title_short | Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves |
| title_sort | formation of the mass density peak at the magnetospheric equator triggered by emic waves |
| topic | toroidal alfvén waves emic waves magnetoseismology equatorial mass density peak |
| url | http://www.eppcgs.org/article/doi/10.26464/epp2021008?pageType=en |
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