Impact of solar wind disappearance event on the Martian nightside ionospheric species: First results
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866914748634759168 |
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| author | Ram, L. Rout, D. Sarkhel, S. |
| author_facet | Ram, L. Rout, D. Sarkhel, S. |
| contents | The impact of a rarest solar wind phenomenon [disappearing solar wind (DSW) event during 26-28 December 2022] on the Martian nightside ionosphere is investigated, for the first time, using MAVEN datasets. During an extremely low solar wind density, the Martian top nightside ionospheric species underwent significant enhancements. At a given altitude, the density of electron increased by ~2.5 times, while for ions (NO+, O2+, CO2+, C+, N+, O+, and OH+), it increased by >10 times, respectively, compared to their typical average quiet-time periods. The extremely low dynamic pressure during the DSW event, contrasting with relatively higher nightside ionospheric thermal pressure nearly by an order, suggests an upward ionospheric expansion as a direct consequence. This causes an increased topside ionospheric density. Additionally, the day-to-night plasma transport may also be a contributing factor to increased plasma density. Thus, this study presents a new insight about planetary atmosphere/ionosphere response to the rarest event. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_20003 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Impact of solar wind disappearance event on the Martian nightside ionospheric species: First results Ram, L. Rout, D. Sarkhel, S. Space Physics The impact of a rarest solar wind phenomenon [disappearing solar wind (DSW) event during 26-28 December 2022] on the Martian nightside ionosphere is investigated, for the first time, using MAVEN datasets. During an extremely low solar wind density, the Martian top nightside ionospheric species underwent significant enhancements. At a given altitude, the density of electron increased by ~2.5 times, while for ions (NO+, O2+, CO2+, C+, N+, O+, and OH+), it increased by >10 times, respectively, compared to their typical average quiet-time periods. The extremely low dynamic pressure during the DSW event, contrasting with relatively higher nightside ionospheric thermal pressure nearly by an order, suggests an upward ionospheric expansion as a direct consequence. This causes an increased topside ionospheric density. Additionally, the day-to-night plasma transport may also be a contributing factor to increased plasma density. Thus, this study presents a new insight about planetary atmosphere/ionosphere response to the rarest event. |
| title | Impact of solar wind disappearance event on the Martian nightside ionospheric species: First results |
| topic | Space Physics |
| url | https://arxiv.org/abs/2403.20003 |