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Multi-year polarimetric monitoring of four CHIME-discovered repeating fast radio bursts with FAST

文献类型：期刊论文

作者Feng, Yi2,3; Zhang, Yong-Kun4; Xie, Jintao5; Yang, Yuan-Pei6,7; Qu, Yuanhong8,9; Zhou, Dengke2; Li, Di4,10; Zhang, Bing8,9; Zhu, Weiwei4,11; Lu, Wenbin12,13
刊名SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
出版日期2025-08-01
卷号68期号:8页码:289511
关键词radio fast radio bursts polarization
ISSN号1674-7348
DOI10.1007/s11433-024-2668-5
产权排序13
英文摘要Fast radio bursts (FRBs) are bright, millisecond-duration radio emissions originating from cosmological distances. In this study, we report multi-year polarization measurements of four repeating FRBs initially discovered by the Canadian Hydrogen Intensity Mapping Experiment (CHIME): FRBs 20190117A, 20190208A, 20190303A, and 20190417A. We observed the four repeating FRBs with the Five-hundred-meter Aperture Spherical Radio Telescope (FAST), detecting a total of 66 bursts. Two bursts from FRB 20190417A exhibit a circular polarization signal-to-noise ratio greater than 7, with the highest circular polarization fraction recorded at 35.7%. While the bursts from FRBs 20190208A and 20190303A are highly linearly polarized, those from FRBs 20190117A and 20190417A show depolarization due to multi-path propagation, with sigma RM = 2.78 +/- 0.05 and 5.19 +/- 0.09 rad m-2, respectively. The linear polarization distributions among five repeating FRBs-FRBs 20190208A, 20190303A, 20201124A, 20220912A, and 20240114A-are nearly identical but show distinct differences from those of non-repeating FRBs. FRBs 20190117A, 20190303A, and 20190417A exhibit substantial rotation measure (RM) variations between bursts, joining other repeating FRBs in this behavior. Combining these findings with published results, 64% of repeating FRBs show RM variations greater than 50 rad m-2, and 21% exhibit RM reversals. A significant proportion of repeating FRBs reside in a dynamic magneto-ionic environment. The structure function of RM variations shows a power-law index of gamma similar to (0-0.8), corresponding to a shallow power spectrum alpha = -(gamma + 2) similar to -(2.0-2.8) of turbulence, if the RM variations are attributed to turbulence. This suggests that the variations are dominated by small-scale RM density fluctuations. We perform K-S tests to compare the RMs of repeating and non-repeating FRBs, which reveal a marginal dichotomy in the distribution of their RMs. We caution that the observed dichotomy may be due to the small sample size and selection biases.
WOS关键词INVERSE COMPTON-SCATTERING ; POLARIZATION PROPERTIES ; ROTATION MEASURE ; CURVATURE RADIATION ; DISPERSION MEASURE ; NARROW SPECTRA ; FRB 121102 ; EMISSION ; BUNCHES ; ENVIRONMENT
资助项目National Natural Science Foundation of China[12588202] ; National Natural Science Foundation of China[12203045] ; National Natural Science Foundation of China[12233002] ; National Natural Science Foundation of China[12403100] ; National Natural Science Foundation of China[12103069] ; National Natural Science Foundation of China[12403042] ; National Natural Science Foundation of China[12473047] ; Leading Innovation and Entrepreneurship Team of Zhejiang Province of China[2023R01008] ; Key R&D Program of Zhejiang[2024SSYS0012] ; National SKA Program of China[2022SKA0130100] ; Xinjiang Tianchi Program
WOS研究方向Physics
语种英语
WOS记录号WOS:001518858600003
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China ; Leading Innovation and Entrepreneurship Team of Zhejiang Province of China ; Key R&D Program of Zhejiang ; National SKA Program of China ; Xinjiang Tianchi Program
源URL[http://ir.xao.ac.cn/handle/45760611-7/7876]  
专题脉冲星研究团组
通讯作者Feng, Yi; Li, Di; Zhang, Bing
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Zhejiang Lab, Res Ctr Astron Comp, Hangzhou 311100, Peoples R China
3.Zhejiang Univ, Inst Astron, Sch Phys, Hangzhou 310027, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
5.Sichuan Univ Sci & Engn, Sch Comp Sci & Engn, Yibin 644000, Peoples R China
6.Yunnan Univ, South Western Inst Astron Res, Kunming 650504, Peoples R China
7.Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China
8.Univ Nevada, Nevada Ctr Astrophys, Las Vegas, NV 89154 USA
9.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA
10.Tsinghua Univ, Dept Astron, New Cornerstone Sci Lab, Beijing 100084, Peoples R China
推荐引用方式
GB/T 7714		 Feng, Yi,Zhang, Yong-Kun,Xie, Jintao,et al. Multi-year polarimetric monitoring of four CHIME-discovered repeating fast radio bursts with FAST[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2025,68(8):289511.
APA Feng, Yi.,Zhang, Yong-Kun.,Xie, Jintao.,Yang, Yuan-Pei.,Qu, Yuanhong.,...&Zhu, Yuhao.(2025).Multi-year polarimetric monitoring of four CHIME-discovered repeating fast radio bursts with FAST.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,68(8),289511.
MLA Feng, Yi,et al."Multi-year polarimetric monitoring of four CHIME-discovered repeating fast radio bursts with FAST".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 68.8(2025):289511.

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