Observations of Transition from Imbalanced to Balanced Kinetic Alfvénic Turbulence
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866915771871920128 |
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| author | Zhao, Jinsong Bowen, Trevor A. Bale, Stuart D. Shi, Chen de Wit, Thierry Dudok Sioulas, Nikos |
| author_facet | Zhao, Jinsong Bowen, Trevor A. Bale, Stuart D. Shi, Chen de Wit, Thierry Dudok Sioulas, Nikos |
| contents | We report observations of solar wind turbulence derived from measurements by the Parker Solar Probe. Our findings reveal the emergence of finite magnetic helicity within the transition range of the turbulence, aligning with signatures of kinetic Alfvén waves (KAWs). Notably, as the wave scale transitions from super-ion to sub-ion scales, the ratio of KAWs with opposing signs of magnetic helicity initially increases from approximately 1 to 6.5 before returning to 1. This observation provides, for the first time, compelling evidence for the transition from imbalanced kinetic Alfvénic turbulence to balanced kinetic Alfvénic turbulence. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_04764 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observations of Transition from Imbalanced to Balanced Kinetic Alfvénic Turbulence Zhao, Jinsong Bowen, Trevor A. Bale, Stuart D. Shi, Chen de Wit, Thierry Dudok Sioulas, Nikos Space Physics Solar and Stellar Astrophysics Plasma Physics We report observations of solar wind turbulence derived from measurements by the Parker Solar Probe. Our findings reveal the emergence of finite magnetic helicity within the transition range of the turbulence, aligning with signatures of kinetic Alfvén waves (KAWs). Notably, as the wave scale transitions from super-ion to sub-ion scales, the ratio of KAWs with opposing signs of magnetic helicity initially increases from approximately 1 to 6.5 before returning to 1. This observation provides, for the first time, compelling evidence for the transition from imbalanced kinetic Alfvénic turbulence to balanced kinetic Alfvénic turbulence. |
| title | Observations of Transition from Imbalanced to Balanced Kinetic Alfvénic Turbulence |
| topic | Space Physics Solar and Stellar Astrophysics Plasma Physics |
| url | https://arxiv.org/abs/2502.04764 |