Long-term variation of the solar polar magnetic fields at different latitudes
Fuente:
arXiv
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866913482143694848 |
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| author | Yang, Shuhong Jiang, Jie Wang, Zifan Hou, Yijun Jin, Chunlan Song, Qiao Luo, Yukun Li, Ting Zhang, Jun Zhang, Yuzong Zhou, Guiping Deng, Yuanyong Wang, Jingxiu |
| author_facet | Yang, Shuhong Jiang, Jie Wang, Zifan Hou, Yijun Jin, Chunlan Song, Qiao Luo, Yukun Li, Ting Zhang, Jun Zhang, Yuzong Zhou, Guiping Deng, Yuanyong Wang, Jingxiu |
| contents | The polar magnetic fields of the Sun play an important role in governing solar activity and powering fast solar wind. However, because our view of the Sun is limited in the ecliptic plane, the polar regions remain largely uncharted. Using the high spatial resolution and polarimetric precision vector magnetograms observed by Hinode from 2012 to 2021, we investigate the long-term variation of the magnetic fields in polar caps at different latitudes. The Hinode magnetic measurements show that the polarity reversal processes in the north and south polar caps are non-simultaneous. The variation of the averaged radial magnetic flux density reveals that, in each polar cap, the polarity reversal is completed successively from the 70 degree latitude to the pole, reflecting a poleward magnetic flux migration therein. These results clarify the polar magnetic polarity reversal process at different latitudes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_15168 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Long-term variation of the solar polar magnetic fields at different latitudes Yang, Shuhong Jiang, Jie Wang, Zifan Hou, Yijun Jin, Chunlan Song, Qiao Luo, Yukun Li, Ting Zhang, Jun Zhang, Yuzong Zhou, Guiping Deng, Yuanyong Wang, Jingxiu Solar and Stellar Astrophysics Space Physics The polar magnetic fields of the Sun play an important role in governing solar activity and powering fast solar wind. However, because our view of the Sun is limited in the ecliptic plane, the polar regions remain largely uncharted. Using the high spatial resolution and polarimetric precision vector magnetograms observed by Hinode from 2012 to 2021, we investigate the long-term variation of the magnetic fields in polar caps at different latitudes. The Hinode magnetic measurements show that the polarity reversal processes in the north and south polar caps are non-simultaneous. The variation of the averaged radial magnetic flux density reveals that, in each polar cap, the polarity reversal is completed successively from the 70 degree latitude to the pole, reflecting a poleward magnetic flux migration therein. These results clarify the polar magnetic polarity reversal process at different latitudes. |
| title | Long-term variation of the solar polar magnetic fields at different latitudes |
| topic | Solar and Stellar Astrophysics Space Physics |
| url | https://arxiv.org/abs/2408.15168 |