Whistler-mode chorus waves at Mars
Abstract Chorus waves are naturally occurring electromagnetic emissions in space and are known to produce highly energetic electrons in the hazardous radiation belt. The characteristic feature of chorus is its fast frequency chirping, whose mechanism remains a long-standing problem. While many theor...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-06-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-38776-z |
| _version_ | 1797806649897910272 |
|---|---|
| author | Shangchun Teng Yifan Wu Yuki Harada Jacob Bortnik Fulvio Zonca Liu Chen Xin Tao |
| author_facet | Shangchun Teng Yifan Wu Yuki Harada Jacob Bortnik Fulvio Zonca Liu Chen Xin Tao |
| author_sort | Shangchun Teng |
| collection | DOAJ |
| description | Abstract Chorus waves are naturally occurring electromagnetic emissions in space and are known to produce highly energetic electrons in the hazardous radiation belt. The characteristic feature of chorus is its fast frequency chirping, whose mechanism remains a long-standing problem. While many theories agree on its nonlinear nature, they differ on whether or how the background magnetic field inhomogeneity plays a key role. Here, using observations of chorus at Mars and Earth, we report direct evidence showing that the chorus chirping rate is consistently related to the background magnetic field inhomogeneity, despite orders of magnitude difference in a key parameter quantifying the inhomogeneity at the two planets. Our results show an extreme test of a recently proposed chorus generation model and confirm the connection between the chirping rate and magnetic field inhomogeneity, opening the door to controlled plasma wave excitation in the laboratory and space. |
| first_indexed | 2024-03-13T06:10:29Z |
| format | Article |
| id | doaj.art-788b3a5cf0554ce197b3db1f6d7365c0 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-13T06:10:29Z |
| publishDate | 2023-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-788b3a5cf0554ce197b3db1f6d7365c02023-06-11T11:18:46ZengNature PortfolioNature Communications2041-17232023-06-011411910.1038/s41467-023-38776-zWhistler-mode chorus waves at MarsShangchun Teng0Yifan Wu1Yuki Harada2Jacob Bortnik3Fulvio Zonca4Liu Chen5Xin Tao6Deep Space Exploration Laboratory/School of Earth and Space Sciences, University of Science and Technology of ChinaDeep Space Exploration Laboratory/School of Earth and Space Sciences, University of Science and Technology of ChinaDepartment of Geophysics, Kyoto UniversityDepartment of Atmospheric and Oceanic Sciences, University of California at Los AngelesCenter for Nonlinear Plasma Science and C.R. ENEA FrascatiInstitute of Fusion Theory and Simulation and School of Physics, Zhejiang UniversityDeep Space Exploration Laboratory/School of Earth and Space Sciences, University of Science and Technology of ChinaAbstract Chorus waves are naturally occurring electromagnetic emissions in space and are known to produce highly energetic electrons in the hazardous radiation belt. The characteristic feature of chorus is its fast frequency chirping, whose mechanism remains a long-standing problem. While many theories agree on its nonlinear nature, they differ on whether or how the background magnetic field inhomogeneity plays a key role. Here, using observations of chorus at Mars and Earth, we report direct evidence showing that the chorus chirping rate is consistently related to the background magnetic field inhomogeneity, despite orders of magnitude difference in a key parameter quantifying the inhomogeneity at the two planets. Our results show an extreme test of a recently proposed chorus generation model and confirm the connection between the chirping rate and magnetic field inhomogeneity, opening the door to controlled plasma wave excitation in the laboratory and space.https://doi.org/10.1038/s41467-023-38776-z |
| spellingShingle | Shangchun Teng Yifan Wu Yuki Harada Jacob Bortnik Fulvio Zonca Liu Chen Xin Tao Whistler-mode chorus waves at Mars Nature Communications |
| title | Whistler-mode chorus waves at Mars |
| title_full | Whistler-mode chorus waves at Mars |
| title_fullStr | Whistler-mode chorus waves at Mars |
| title_full_unstemmed | Whistler-mode chorus waves at Mars |
| title_short | Whistler-mode chorus waves at Mars |
| title_sort | whistler mode chorus waves at mars |
| url | https://doi.org/10.1038/s41467-023-38776-z |
| work_keys_str_mv | AT shangchunteng whistlermodechoruswavesatmars AT yifanwu whistlermodechoruswavesatmars AT yukiharada whistlermodechoruswavesatmars AT jacobbortnik whistlermodechoruswavesatmars AT fulviozonca whistlermodechoruswavesatmars AT liuchen whistlermodechoruswavesatmars AT xintao whistlermodechoruswavesatmars |