Polarization Position Angle Swing and the Rotating Vector Model of Repeating Fast Radio Bursts
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911010327101440 |
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| author | Liu, Xiaohui Xu, Heng Niu, Jiarui Zhang, Yongkun Jiang, Jinchen Zhou, Dejiang Han, Jinlin Zhu, Weiwei Lee, Kejia Li, Di Wang, Wei-Yang Zhang, Bing Chen, Xuelei Luo, Jia-Wei Luo, Rui Niu, Chenhui Qu, Yuanhong Wang, Bojun Wang, Fayin Wang, Pei Wang, Tiancong Wu, Qin Wu, Ziwei Xu, Jiangwei Yang, Yuan-Pei Zhang, Jun-Shuo |
| author_facet | Liu, Xiaohui Xu, Heng Niu, Jiarui Zhang, Yongkun Jiang, Jinchen Zhou, Dejiang Han, Jinlin Zhu, Weiwei Lee, Kejia Li, Di Wang, Wei-Yang Zhang, Bing Chen, Xuelei Luo, Jia-Wei Luo, Rui Niu, Chenhui Qu, Yuanhong Wang, Bojun Wang, Fayin Wang, Pei Wang, Tiancong Wu, Qin Wu, Ziwei Xu, Jiangwei Yang, Yuan-Pei Zhang, Jun-Shuo |
| contents | Fast radio bursts (FRBs), typically highly polarized, usually have a nearly constant polarization position angle (PA) during each burst. Some bursts show significant PA variations, and one of them was claimed to have a PA variation pattern consistent with the prediction of the rotating vector model (RVM) commonly adopted to fit the PA variations in radio pulsars. We systematically study the PA evolution pattern of 1727 bursts from three active repeating FRB sources monitored by the Five-hundred-meter Aperture Spherical Telescope (FAST). We identify 46 bursts whose PA variations are fully consistent with the RVM. However, the inferred geometrical parameters and rotation periods derived from these RVM fitting are inconsistent from each other. This suggests that the magnetosphere of the FRB central engine is constantly distorted by the FRB emitter, and the magnetic configuration is dynamically evolving. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_00391 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Polarization Position Angle Swing and the Rotating Vector Model of Repeating Fast Radio Bursts Liu, Xiaohui Xu, Heng Niu, Jiarui Zhang, Yongkun Jiang, Jinchen Zhou, Dejiang Han, Jinlin Zhu, Weiwei Lee, Kejia Li, Di Wang, Wei-Yang Zhang, Bing Chen, Xuelei Luo, Jia-Wei Luo, Rui Niu, Chenhui Qu, Yuanhong Wang, Bojun Wang, Fayin Wang, Pei Wang, Tiancong Wu, Qin Wu, Ziwei Xu, Jiangwei Yang, Yuan-Pei Zhang, Jun-Shuo High Energy Astrophysical Phenomena Fast radio bursts (FRBs), typically highly polarized, usually have a nearly constant polarization position angle (PA) during each burst. Some bursts show significant PA variations, and one of them was claimed to have a PA variation pattern consistent with the prediction of the rotating vector model (RVM) commonly adopted to fit the PA variations in radio pulsars. We systematically study the PA evolution pattern of 1727 bursts from three active repeating FRB sources monitored by the Five-hundred-meter Aperture Spherical Telescope (FAST). We identify 46 bursts whose PA variations are fully consistent with the RVM. However, the inferred geometrical parameters and rotation periods derived from these RVM fitting are inconsistent from each other. This suggests that the magnetosphere of the FRB central engine is constantly distorted by the FRB emitter, and the magnetic configuration is dynamically evolving. |
| title | Polarization Position Angle Swing and the Rotating Vector Model of Repeating Fast Radio Bursts |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2504.00391 |