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Despite the first detection of fast radio bursts (FRBs) being as recent as 2007, they have already been proven to be a fantastic tool as a unique cosmological probe. In this chapter, after a brief introduction to FRBs and how they are…

Cosmology and Nongalactic Astrophysics · Physics 2025-01-31 Marcin Glowacki , Khee-Gan Lee

I consider novel ways by which Gamma-Ray Bursts (GRBs) and quasars can be used to probe the universe. Clues about how and when was the intergalactic medium ionized can be read off the UV emission spectrum of GRB explosions from the first…

Astrophysics · Physics 2009-11-07 Abraham Loeb

The dispersion of fast radio bursts (FRBs) measures the column density of free electrons, tracing the diffuse ionized gas that contains more than $90\%$ of all baryons. On linear scales the FRB dispersion field is an approximately unbiased…

Cosmology and Nongalactic Astrophysics · Physics 2026-04-29 Shion Andrew , Haochen Wang , Kiyoshi Masui , Josh Borrow , Calvin Leung , Ryan Raikman , Matthieu Schaller , Joop Schaye , James M. Sullivan

Fast radio bursts (FRBs) represent one of the most exciting astrophysical discoveries of the recent past. The study of their low-frequency emission, which was only effectively picked up about ten years after their discovery, has helped…

High Energy Astrophysical Phenomena · Physics 2022-03-10 Maura Pilia

Extragalactic Fast Radio Bursts (FRBs) have large dispersion measures (DMs) and are unique probes of intergalactic electron density fluctuations. By using the recently released First CHIME/FRB Catalog, we reexamined the structure function…

Cosmology and Nongalactic Astrophysics · Physics 2021-12-08 Siyao Xu , David H. Weinberg , Bing Zhang

The dispersion measure-redshift relation of fast radio bursts (FRBs) provides a valuable cosmological probe for constraining the Hubble constant, offering an independent measurement that could help resolve the ongoing Hubble tension. In…

Cosmology and Nongalactic Astrophysics · Physics 2025-07-28 Chenyuan Xu , Yi Feng , Jiaying Xu

The rapid accumulation of observed Fast Radio Bursts (FRBs) originating from cosmological distances makes it likely that some will be strongly lensed by intervening matter along the line of sight. Detection of lensed FRB repeaters, which…

Cosmology and Nongalactic Astrophysics · Physics 2022-09-09 Tal Adi , Ely D. Kovetz

We briefly review main observational properties of fast radio bursts (FRBs) and discuss two most popular hypothesis for the explanation of these enigmatic intense millisecond radio flashes. FRBs most probably originate on extragalactic…

High Energy Astrophysical Phenomena · Physics 2018-08-08 S. B. Popov , K. A. Postnov , M. S. Pshirkov

The circumgalactic medium (CGM) is poorly constrained at the sub-parsec scales relevant to turbulent energy dissipation and regulation of multi-phase structure. Fast radio bursts (FRBs) are sensitive to small-scale plasma density…

Astrophysics of Galaxies · Physics 2025-07-25 S. K. Ocker , M. Chen , S. P. Oh , P. Sharma

Fast radio bursts (FRBs) are extremely strong radio flares lasting several milliseconds, most of which come from unidentified objects at a cosmological distance. They can be apparently repeating or not. In this paper, we analyzed 18…

Growing evidence indicates that some fast radio bursts (FRBs) reside in dense, magneto-ionic environments where extrinsic propagation effects can substantially reshape the observed signal. Within a 1D Gaussian plasma-lens framework, we show…

High Energy Astrophysical Phenomena · Physics 2026-01-19 R. N. Li , Y. B. Wang , S. X. Yi , X. Zhou , F. Y. Wang

Fast Radio Bursts are bright, unresolved, non-repeating, broadband, millisecond flashes, found primarily at high Galactic latitudes, with dispersion measures much larger than expected for a Galactic source. The inferred all-sky burst rate…

Fast radio bursts (FRBs) are extremely energetic, millisecond-duration radio flashes that reach Earth from extragalactic distances. Broadly speaking, FRBs can be classified as repeating or (apparently) non-repeating. It is still unclear,…

High Energy Astrophysical Phenomena · Physics 2023-06-28 F. Kirsten , O. Ould-Boukattine , W. Herrmann , M. Gawronski , J. Hessels , W. Lu , M. Snelders , P. Chawla , J. Yang , R. Blaauw , K. Nimmo , W. Puchalska , P. Wolak , R. van Ruiten

The millisecond-duration radio flashes known as Fast Radio Bursts (FRBs) represent an enigmatic astrophysical phenomenon. Recently, the sub-arcsecond localization (~ 100mas precision) of FRB121102 using the VLA has led to its unambiguous…

Recent observations indicate that magnetars may commonly reside in merging compact binaries and at least part of fast radio bursts (FRBs) are sourced by magnetar activities. It is natural to speculate that a class of merging neutron star…

High Energy Astrophysical Phenomena · Physics 2023-09-19 Zhen Pan , Huan Yang , Kent Yagi

Fast Radio Bursts (FRBs) carry fossil information about non-Gaussianity generated during inflation. This primordial signal is most accessible on the largest scales, where the scale-dependent bias correction $\propto…

Cosmology and Nongalactic Astrophysics · Physics 2026-04-07 Simthembile Dlamini

The population of fast radio bursts (FRBs) will continue to diverge into two groups depending on their method of discovery: those which can be localised, and those which cannot. Events potentially less useful for astronomical and…

High Energy Astrophysical Phenomena · Physics 2020-07-01 C. R. H. Walker , Y. -Z. Ma , R. P. Breton

Fast radio bursts (FRBs) are luminous millisecond-duration radio pulses with extragalactic origin, which were discovered more than a decade ago. Despite the numerous samples, the physical origin of FRBs remains poorly understood. FRBs have…

High Energy Astrophysical Phenomena · Physics 2024-04-08 Z. Y. Zhao , K. Chen , F. Y. Wang , Z. G. Dai

We propose measuring the arrival time difference of Fast Radio Bursts (FRBs) along two adjacent sightlines as a new probe to dark matter substructures on scales down to $\sim 1\,$AU. We discuss two observational scenarios in which it may be…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-16 Huangyu Xiao , Liang Dai , Matthew McQuinn

Fast radio bursts (FRBs) are millisecond radio transients observed at cosmological distances. The nature of their progenitors is still a matter of debate, although magnetars are invoked by most models. The proposed FRB-magnetar connection…