Structure Functions of Rotation Measures Revealing the Origin of Fast Radio Bursts

被引：0
作者：
Li, Rui-Nan [1 ]
Zhao, Zhen-Yin [1 ]
Wu, Qin [1 ]
Yi, Shuang-Xi [2 ]
Wang, Fa-Yin [1 ,3 ]
机构：
[1] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China
[2] Qufu Normal Univ, Sch Phys & Phys Engn, Qufu 273165, Peoples R China
[3] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing, Peoples R China
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2025年 / 979卷 / 02期
基金：
中国国家自然科学基金;
关键词：
GALACTIC MAGNETIC-FIELD; SMALL-SCALE VARIATIONS; SUPERNOVA REMNANT; PERIASTRON PASSAGE; DISPERSION MEASURE; FRB; 121102; PSR B1259-63; WIND NEBULA; TURBULENCE; POLARIZATION;
D O I：
10.3847/2041-8213/adabc2
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Structure function (SF) analysis is a powerful tool for studying plasma turbulence. Theoretically, the SF of Faraday rotation measure (RM) is expected to include a geometric component due to the relative orientation of sight lines through an ordered magnetic field. However, observational evidence for this component remains elusive. Here, we report that the SFs of the binary PSR B1744-24A and the repeating fast radio burst (FRB) 20201124A exhibit both a periodic geometric component, caused by binary orbital motion, and a flat statistical component. The statistical component, induced by stochastic fluctuations in electron density and magnetic field, aligns with RM scatter derived from pulse depolarization. These findings indicate that FRB 20201124A has a binary origin and suggest that the periodic geometric component can serve as a diagnostic tool to identify binary companions.
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页数：10
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