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Fast radio bursts (FRBs) are millisecond-duration extragalactic radio transients of unknown origin. Rotation measures (RMs) probe their local magneto-ionic environments and provide important clues to their nature. While RM variability has…

High Energy Astrophysical Phenomena · Physics 2026-04-23 Ye Li

Recent studies of fast radio bursts (FRBs) have led to many theories associating them with young neutron stars. If this is the case, then the presence of supernova ejecta and stellar winds provide a changing dispersion measure (DM) and…

High Energy Astrophysical Phenomena · Physics 2018-08-01 Anthony L. Piro , B. M. Gaensler

Since the discovery of FRB 200428 associated with the Galactic SGR 1935+2154, magnetars are considered to power fast radio bursts (FRBs). It is widely believed that magnetars could form by core-collapse (CC) explosions and compact binary…

High Energy Astrophysical Phenomena · Physics 2021-02-17 Z. Y. Zhao , G. Q. Zhang , Y. Y. Wang , Z. L. Tu , F. Y. Wang

Fast radio bursts (FRBs) are millisecond-duration radio bursts with unidentified extra-galactic origin. Some FRBs exhibit mild magneto-ionic environmental variations, possibly attributed to plasma turbulence or binary configuration. We…

The repeating fast radio burst (FRB) 121102 was recently localized in a dwarf galaxy at a cosmological distance. The dispersion measure (DM) derived for each burst from FRB 121102 so far has not shown significant evolution, even though an…

High Energy Astrophysical Phenomena · Physics 2017-09-27 Yuan-Pei Yang , Bing Zhang

Variations in the Faraday rotation measure (RM) of repeating fast radio bursts (FRBs) provide critical diagnostics of the dynamically evolving magneto-ionic environments surrounding their progenitors. Sudden, transient ``RM flares'' can…

High Energy Astrophysical Phenomena · Physics 2026-05-28 Yuan-Pei Yang , Boyang Liu

Fast radio bursts (FRB) will become important cosmological tools, as the number of observed FRBs is increasing rapidly with more surveys being carried out. A large sample of FRBs with dispersion measures (DM) and rotation measures (RM) can…

Astrophysics of Galaxies · Physics 2024-10-02 Timea Orsolya Kovacs , Sui Ann Mao , Aritra Basu , Yik Ki Ma , Laura G. Spitler , Charles R. H. Walker

Fast radio bursts (FRBs) provide a sensitive probe of ionized baryons through their dispersion measure (DM). In addition to slowly evolving cosmological terms, at least two repeaters now show clear secular DM-decrease episodes:…

High Energy Astrophysical Phenomena · Physics 2026-03-11 Zhao Joseph Zhang , Gaku Kawashima , Shiu-Hang Lee , Kentaro Nagamine , Bing Zhang , Yusei Fujimaru

Recently, some fast radio burst (FRB) repeaters were reported to exhibit complex, diverse variations of Faraday rotation measures (RMs), which implies that they are surrounded by an inhomogeneous, dynamically evolving, magnetized…

High Energy Astrophysical Phenomena · Physics 2023-01-25 Yuan-Pei Yang , Siyao Xu , Bing Zhang

Recent observations discovered that some repeating fast radio bursts (FRBs) show complicated variations and reversals of Faraday rotation measures (RMs), indicating that the sources of these FRBs are embedded in a dynamically magnetized…

High Energy Astrophysical Phenomena · Physics 2023-01-25 Z. Y. Zhao , G. Q. Zhang , F. Y. Wang , Z. G. Dai

Fast radio bursts (FRBs) are mysterious millisecond-duration radio transients of extragalactic origin. Some of them repeat, while others apparently do not. Investigations of periodic activity in repeating FRB have been conducted to probe…

Fast radio bursts (FRBs) are luminous, millisecond-duration transients that offer great potential for probing the universe, yet their physical origins remain unclear. The dispersion measure (DM) and scattering time ($\tau$) distributions…

High Energy Astrophysical Phenomena · Physics 2025-06-24 Jian-Feng Mo , Weishan Zhu , Long-Long Feng

Fast radio bursts (FRBs) are transient intense radio pulses with duration of milliseconds. Although the first FRB was detected more than a decade ago, the progenitors of these energetic events are not yet known. The currently preferred…

High Energy Astrophysical Phenomena · Physics 2020-01-08 Esha Kundu , Lilia Ferrario

The rotation measure (RM) and dispersion measure (DM) of fast radio bursts (FRBs) serve as critical probes of the magneto-ionic environments along the line of sight. The significant temporal evolution of RM observed in some repeating FRBs…

High Energy Astrophysical Phenomena · Physics 2026-04-29 Qing Zhao , Di Xiao , Xue-Feng Wu

The origin of fast radio bursts (FRBs), the brightest cosmic radio explosions, is still unknown. Bearing critical clues to FRBs' origin, the long-term evolution of FRBs has yet to be confirmed, since the field is still young and most FRBs…

Fast radio bursts (FRBs) are millisecond-duration radio transients. As they propagate through the interstellar medium, they interact with free electrons, resulting in dispersion. The corresponding dispersion measure (DM) is referred to as…

High Energy Astrophysical Phenomena · Physics 2026-04-03 Yi Feng , Dengke Zhou , Y. -K. Zhang , D. Li , Jianhua Fang , Jiaying Xu , Chenyuan Xu , Jintao Xie

Fast radio bursts (FRBs) are bright, millisecond-duration radio bursts with poorly known origins. Most FRB sources are detected only once, while some are repeaters. Variation patterns observed in the rotation measure (RM) of some repeaters…

High Energy Astrophysical Phenomena · Physics 2026-02-16 Ying-ze Shan , Wei-Hua Lei , Hao-Tian Lan , Shao-yu Fu , Jumpei Takata , Yuan-chuan Zou , Jia-xin Liu , Long-xuan Zhang , Tong-lun Wang , Fa-Yin Wang

Nearly 700 fast radio burst (FRB) sources have been detected till now, among which 29 FRBs are found to burst out repeatedly. Although a firm connection between at least some FRBs and magnetars has been established, the trigger mechanism…

High Energy Astrophysical Phenomena · Physics 2023-10-31 Chen-Ran Hu , Yong-Feng Huang

Fast radio bursts (FRBs) are cosmic sources emitting millisecond-duration radio bursts. Although several hundreds FRBs have been discovered, their physical nature and central engine remain unclear. The variations of Faraday rotation measure…

High Energy Astrophysical Phenomena · Physics 2022-09-23 F. Y. Wang , G. Q. Zhang , Z. G. Dai , K. S. Cheng
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