Random Polarization Position Angle Behaviors across Bursts of Repeating Fast Radio Bursts
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arXiv
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2026
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| author | Liu, Xiaohui Niu, Jiarui Wang, Tiancong Zhang, Jun-Shuo Qu, Yuanhong Jiang, Jinchen Zhang, Yongkun Xu, Heng Zhou, Dejiang Wang, Wei-Yang Zhu, Weiwei Zhang, Bing Chen, Xuelei Cui, Xiang-Han Han, Jinlin Lee, Kejia Li, Di Luo, Jiawei Luo, Rui Liang, Chengwei Niu, Chenhui Sun, Wan-Peng Wang, Bojun Wang, Fayin Wang, Pei Wu, Qin Wu, Ziwei Xu, Jiangwei Yang, Yuan-Pei Zhao, Shiqian |
| author_facet | Liu, Xiaohui Niu, Jiarui Wang, Tiancong Zhang, Jun-Shuo Qu, Yuanhong Jiang, Jinchen Zhang, Yongkun Xu, Heng Zhou, Dejiang Wang, Wei-Yang Zhu, Weiwei Zhang, Bing Chen, Xuelei Cui, Xiang-Han Han, Jinlin Lee, Kejia Li, Di Luo, Jiawei Luo, Rui Liang, Chengwei Niu, Chenhui Sun, Wan-Peng Wang, Bojun Wang, Fayin Wang, Pei Wu, Qin Wu, Ziwei Xu, Jiangwei Yang, Yuan-Pei Zhao, Shiqian |
| contents | Fast radio bursts (FRBs), highly polarized, mostly have a nearly constant polarization position angle (PA) during each burst. Their PAs are observed to vary from burst to burst, with the statistical properties remaining stable across different observation sessions. We found that the intrinsic PAs of repeating FRBs are approximately Gaussian distributed, suggesting that the emission likely originates from a localized region within the neutron star's magnetosphere. A periodicity search of the PA time series using the Lomb-Scargle periodogram reveals no credible periodic signal in the period range from 10 ms to $10^7$ ms, and similar analyses of several active observations also yield null detections. We interpret these properties by extending the rotating vector model to include a dynamically evolving magnetosphere, in which the effective magnetic axis varies from burst to burst due to stochastic perturbations. In this framework, the observed PA distributions can naturally arise from geometric projection effects, and the absence of periodicity reflects the random wandering of the magnetic axis within a confined region. This scenario provides a natural explanation for both repeating and apparently non-repeating FRBs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_00372 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Random Polarization Position Angle Behaviors across Bursts of Repeating Fast Radio Bursts Liu, Xiaohui Niu, Jiarui Wang, Tiancong Zhang, Jun-Shuo Qu, Yuanhong Jiang, Jinchen Zhang, Yongkun Xu, Heng Zhou, Dejiang Wang, Wei-Yang Zhu, Weiwei Zhang, Bing Chen, Xuelei Cui, Xiang-Han Han, Jinlin Lee, Kejia Li, Di Luo, Jiawei Luo, Rui Liang, Chengwei Niu, Chenhui Sun, Wan-Peng Wang, Bojun Wang, Fayin Wang, Pei Wu, Qin Wu, Ziwei Xu, Jiangwei Yang, Yuan-Pei Zhao, Shiqian High Energy Astrophysical Phenomena Fast radio bursts (FRBs), highly polarized, mostly have a nearly constant polarization position angle (PA) during each burst. Their PAs are observed to vary from burst to burst, with the statistical properties remaining stable across different observation sessions. We found that the intrinsic PAs of repeating FRBs are approximately Gaussian distributed, suggesting that the emission likely originates from a localized region within the neutron star's magnetosphere. A periodicity search of the PA time series using the Lomb-Scargle periodogram reveals no credible periodic signal in the period range from 10 ms to $10^7$ ms, and similar analyses of several active observations also yield null detections. We interpret these properties by extending the rotating vector model to include a dynamically evolving magnetosphere, in which the effective magnetic axis varies from burst to burst due to stochastic perturbations. In this framework, the observed PA distributions can naturally arise from geometric projection effects, and the absence of periodicity reflects the random wandering of the magnetic axis within a confined region. This scenario provides a natural explanation for both repeating and apparently non-repeating FRBs. |
| title | Random Polarization Position Angle Behaviors across Bursts of Repeating Fast Radio Bursts |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2605.00372 |