On Energization and Loss of the Ionized Heavy Atom and Molecule in Mars' Atmosphere
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arXiv
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| author | Zhao, J. -T. Zong, Q. -G. Liu, Z. -Y. Zhou, X. -Z. Wang, S. Ip, W. -H. Yue, C. Li, J. -H. Hao, Y. -X. Rankin, R. Degeling, A. Fu, S. -Y. Zou, H. Wang, Y. -F. |
| author_facet | Zhao, J. -T. Zong, Q. -G. Liu, Z. -Y. Zhou, X. -Z. Wang, S. Ip, W. -H. Yue, C. Li, J. -H. Hao, Y. -X. Rankin, R. Degeling, A. Fu, S. -Y. Zou, H. Wang, Y. -F. |
| contents | The absence of global magnetic fields is often cited to explain why Mars lacks a dense atmosphere. This line of thought is based on a prevailing theory that magnetic fields can shield the atmosphere from solar wind erosion. However, we present observations here to demonstrate a counterintuitive understanding: unlike the global intrinsic magnetic field, the remnant crustal magnetic fields can enhance atmosphere loss when considering loss induced by plasma wave-particle interactions. An analysis of MAVEN data, combined with observation-based simulations, reveals that the bulk of O+ ions would be in resonance with ultra-low frequency (ULF) waves when the latter were present. This interaction then results in significant particle energization, thus enhancing ion escaping. A more detailed analysis attributes the occurrence of the resonance to the presence of Mars' crustal magnetic fields, which cause the majority of nearby ions to gyrate at a frequency matching the resonant condition (ω-k_{\parallel} v_{\parallel}=Ω_i) of the waves. The ULF waves, fundamental drivers of this entire process, are excited and propelled by the upstream solar wind. Consequently, our findings offer a plausible explanation for the mysterious changes in Mars' climate, suggesting that the ancient solar wind imparted substantially more energy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_00832 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On Energization and Loss of the Ionized Heavy Atom and Molecule in Mars' Atmosphere Zhao, J. -T. Zong, Q. -G. Liu, Z. -Y. Zhou, X. -Z. Wang, S. Ip, W. -H. Yue, C. Li, J. -H. Hao, Y. -X. Rankin, R. Degeling, A. Fu, S. -Y. Zou, H. Wang, Y. -F. Space Physics Earth and Planetary Astrophysics The absence of global magnetic fields is often cited to explain why Mars lacks a dense atmosphere. This line of thought is based on a prevailing theory that magnetic fields can shield the atmosphere from solar wind erosion. However, we present observations here to demonstrate a counterintuitive understanding: unlike the global intrinsic magnetic field, the remnant crustal magnetic fields can enhance atmosphere loss when considering loss induced by plasma wave-particle interactions. An analysis of MAVEN data, combined with observation-based simulations, reveals that the bulk of O+ ions would be in resonance with ultra-low frequency (ULF) waves when the latter were present. This interaction then results in significant particle energization, thus enhancing ion escaping. A more detailed analysis attributes the occurrence of the resonance to the presence of Mars' crustal magnetic fields, which cause the majority of nearby ions to gyrate at a frequency matching the resonant condition (ω-k_{\parallel} v_{\parallel}=Ω_i) of the waves. The ULF waves, fundamental drivers of this entire process, are excited and propelled by the upstream solar wind. Consequently, our findings offer a plausible explanation for the mysterious changes in Mars' climate, suggesting that the ancient solar wind imparted substantially more energy. |
| title | On Energization and Loss of the Ionized Heavy Atom and Molecule in Mars' Atmosphere |
| topic | Space Physics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2410.00832 |