FAST Polarization Catalog of FRB 20240114A
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2026
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| author | Wang, Tian-Cong Zhang, Jun-Shuo Liu, Xiao-Hui Wang, Wei-Yang Wang, Pei Gao, He Li, Di Zhang, Bing Zhu, Wei-Wei Han, Jin-Lin Lee, Ke-Jia Li, Ye Zhou, Dengke Lu, Wan-Jin Xie, Jintao Fang, Jianhua Cao, Jin-Huang Miao, Chen-Chen Zhu, Yu-Hao Chen, Yunchuan Xu, Si-Lu Chen, Huaxi Cheng, Xiao-Feng Wu, Qin Cao, Shuo Zhang, Long-Xuan Tian, Shi-Yan Zhang, Yong-Kun Feng, Yi Zhou, De-Jiang Niu, Jia-Rui Xu, Heng Chen, Xuelei Yang, Yuan-Pei Li, Dong-Zi Wang, Fa-Yin Tsai, Chao-Wei Yu, Wen-Fei Niu, Chen-Hui Luo, Jia-Wei Luo, Rui Gugercinoglu, E. Wu, Zi-Wei Zhang, Chun-Feng Chen, Xiang-Lei Feng, Shuai Cui, Xiang-Han Qu, Qing-Yue Qu, Yuan-Hong Wang, Bo-Jun Wang, Yi-Dan Lin, Lin Yang, Ai-Yuan Zou, Yuan-Chuan Huang, Yu-Xiang Jing, Wei-Cong Li, Jian Huang, Yong-Feng Weng, Su-Ming Yew, Shi-Han Wu, Xue-Feng Zhang, Lei Zhao, Ru-Shuang |
| author_facet | Wang, Tian-Cong Zhang, Jun-Shuo Liu, Xiao-Hui Wang, Wei-Yang Wang, Pei Gao, He Li, Di Zhang, Bing Zhu, Wei-Wei Han, Jin-Lin Lee, Ke-Jia Li, Ye Zhou, Dengke Lu, Wan-Jin Xie, Jintao Fang, Jianhua Cao, Jin-Huang Miao, Chen-Chen Zhu, Yu-Hao Chen, Yunchuan Xu, Si-Lu Chen, Huaxi Cheng, Xiao-Feng Wu, Qin Cao, Shuo Zhang, Long-Xuan Tian, Shi-Yan Zhang, Yong-Kun Feng, Yi Zhou, De-Jiang Niu, Jia-Rui Xu, Heng Chen, Xuelei Yang, Yuan-Pei Li, Dong-Zi Wang, Fa-Yin Tsai, Chao-Wei Yu, Wen-Fei Niu, Chen-Hui Luo, Jia-Wei Luo, Rui Gugercinoglu, E. Wu, Zi-Wei Zhang, Chun-Feng Chen, Xiang-Lei Feng, Shuai Cui, Xiang-Han Qu, Qing-Yue Qu, Yuan-Hong Wang, Bo-Jun Wang, Yi-Dan Lin, Lin Yang, Ai-Yuan Zou, Yuan-Chuan Huang, Yu-Xiang Jing, Wei-Cong Li, Jian Huang, Yong-Feng Weng, Su-Ming Yew, Shi-Han Wu, Xue-Feng Zhang, Lei Zhao, Ru-Shuang |
| contents | Polarization measurements of fast radio bursts (FRBs) probe the magnetized plasma surrounding their central engines. FRB~20240114A is an exceptionally active repeating source, with 17,356 bursts detected between 2024 January 28 and 2025 May 30 by FAST, enabling time-resolved polarimetric studies. In this work, we present a polarimetric catalog of 6,131 bright bursts (with a signal-to-noise ratio S/N $\geq$ 20, 35.3% of the total sample), including arrival time (MJD$_{\text{topo}}$), dispersion measure (DM), burst width (W$_{\text{eff}}$), bandwidth, Faraday rotation measure (RM), linear and circular polarization degrees (DOL, DOC), and intrinsic polarization angle (PA$_0$). We detect a clear temporal evolution of RM: after an initial stable phase, it decreases linearly by $\sim$200 $\rm rad\ m^{-2}$ over 200 days, forming a bimodal distribution, whereas DM remains stable at 528.9 $\rm pc\ cm^{-3}$. The linear polarization fraction is generally high, with the 3$σ$ lower bound around 76%, while circular polarization is low, with 1,157 of 17,356 bursts (6.67%) having DOC $\geq$10%. We perform a power-law fit between $|\textrm{V}|$/I and $|\textrm{RM}|$, which yields an index of $-2.98 \pm 0.80$. It is found that the combined 2D distribution of L/I versus V/I remains stable, implying that the emission mechanism is largely invariant. Our PA$_0$ measurements show a broad, non-uniform distribution, implying a complex emission geometry. These results suggest that FRB~20240114A resides in a dynamically evolving magneto-ionic environment. This catalog provides a foundation for studies of repeating FRB progenitors and their environments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_20663 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | FAST Polarization Catalog of FRB 20240114A Wang, Tian-Cong Zhang, Jun-Shuo Liu, Xiao-Hui Wang, Wei-Yang Wang, Pei Gao, He Li, Di Zhang, Bing Zhu, Wei-Wei Han, Jin-Lin Lee, Ke-Jia Li, Ye Zhou, Dengke Lu, Wan-Jin Xie, Jintao Fang, Jianhua Cao, Jin-Huang Miao, Chen-Chen Zhu, Yu-Hao Chen, Yunchuan Xu, Si-Lu Chen, Huaxi Cheng, Xiao-Feng Wu, Qin Cao, Shuo Zhang, Long-Xuan Tian, Shi-Yan Zhang, Yong-Kun Feng, Yi Zhou, De-Jiang Niu, Jia-Rui Xu, Heng Chen, Xuelei Yang, Yuan-Pei Li, Dong-Zi Wang, Fa-Yin Tsai, Chao-Wei Yu, Wen-Fei Niu, Chen-Hui Luo, Jia-Wei Luo, Rui Gugercinoglu, E. Wu, Zi-Wei Zhang, Chun-Feng Chen, Xiang-Lei Feng, Shuai Cui, Xiang-Han Qu, Qing-Yue Qu, Yuan-Hong Wang, Bo-Jun Wang, Yi-Dan Lin, Lin Yang, Ai-Yuan Zou, Yuan-Chuan Huang, Yu-Xiang Jing, Wei-Cong Li, Jian Huang, Yong-Feng Weng, Su-Ming Yew, Shi-Han Wu, Xue-Feng Zhang, Lei Zhao, Ru-Shuang High Energy Astrophysical Phenomena Polarization measurements of fast radio bursts (FRBs) probe the magnetized plasma surrounding their central engines. FRB~20240114A is an exceptionally active repeating source, with 17,356 bursts detected between 2024 January 28 and 2025 May 30 by FAST, enabling time-resolved polarimetric studies. In this work, we present a polarimetric catalog of 6,131 bright bursts (with a signal-to-noise ratio S/N $\geq$ 20, 35.3% of the total sample), including arrival time (MJD$_{\text{topo}}$), dispersion measure (DM), burst width (W$_{\text{eff}}$), bandwidth, Faraday rotation measure (RM), linear and circular polarization degrees (DOL, DOC), and intrinsic polarization angle (PA$_0$). We detect a clear temporal evolution of RM: after an initial stable phase, it decreases linearly by $\sim$200 $\rm rad\ m^{-2}$ over 200 days, forming a bimodal distribution, whereas DM remains stable at 528.9 $\rm pc\ cm^{-3}$. The linear polarization fraction is generally high, with the 3$σ$ lower bound around 76%, while circular polarization is low, with 1,157 of 17,356 bursts (6.67%) having DOC $\geq$10%. We perform a power-law fit between $|\textrm{V}|$/I and $|\textrm{RM}|$, which yields an index of $-2.98 \pm 0.80$. It is found that the combined 2D distribution of L/I versus V/I remains stable, implying that the emission mechanism is largely invariant. Our PA$_0$ measurements show a broad, non-uniform distribution, implying a complex emission geometry. These results suggest that FRB~20240114A resides in a dynamically evolving magneto-ionic environment. This catalog provides a foundation for studies of repeating FRB progenitors and their environments. |
| title | FAST Polarization Catalog of FRB 20240114A |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.20663 |