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We investigate the 21-cm signature that may arise from the intergalactic medium (IGM) prior to the epoch of full reionization (z>5). In scenarios in which the IGM is reionized by discrete sources of photoionizing radiation, the neutral gas…

Astrophysics · Physics 2009-10-28 Piero Madau , Avery Meiksin , Martin J. Rees

We collect 133 Fast Radio Bursts (FRBs), including 110 non-repeating and 23 repeating ones, and systematically investigate their observational properties. To check the frequency dependence of FRB classifications, we define our samples with…

High Energy Astrophysical Phenomena · Physics 2022-01-05 X. J. Li , X. F. Dong , Z. B. Zhang , D. Li

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

We report on the discovery of a new fast radio burst, FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6$\pm$0.8 pc cm^{-3}, a pulse duration of…

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

For future surveys of fast radio bursts (FRBs), we clarify information available from cosmic dispersion measures (DMs) through cross-correlation analyses of foreground dark matter haloes (hosting galaxies and galaxy clusters) with their…

Cosmology and Nongalactic Astrophysics · Physics 2022-03-02 Masato Shirasaki , Ryuichi Takahashi , Ken Osato , Kunihito Ioka

Fast Radio Bursts (FRBs) are highly energetic, extremely short-lived bursts of radio flashes. Despite extensive research, the exact cause of these outbursts remains speculative. The high luminosity, short duration, and high dispersion…

High Energy Astrophysical Phenomena · Physics 2025-08-26 F. Aharonian , A. Archaryya , J. Aschersleben , H. Ashkar , M. Backes , V. Barbosa. Martins , R. Batzofin , Y. Becherini , D. Berge , K. Bernlöhr , M. Böttcher , C. Boisson , J. Bolmont , M. de. Bony. de. Lavergne , J. Borowska , F. Bradascio , R. Brose , A. Brown , F. Brun , B. Bruno , C. Burger-Scheidlin , S. Casanova , J. Celic , M. Cerruti , T. Chand , S. Chandra , A. Chen , J. Chibueze , O. Chibueze , J. Damascene. Mbarubucyeye , J. de. Assis. Scarpin , A. Djannati-Ataï , J. Djuvsland , A. Dmytriiev , K. Egberts , S. Einecke , J. -P. Ernenwein , C. Escañuela. Nieves , M. Filipovic , G. Fontaine , S. Funk , S. Gabici , J. F. Glicenstein , J. Glombitza , G. Grolleron , B. Heß , W. Hofmann , T. L. Holch , M. Holler , D. Horns , Zhiqiu. Huang , A. Jaitly , M. Jamrozy , F. Jankowsky , I. Jung-Richardt , E. Kasai , K. Katarzyński , D. Kerszberg , R. Khatoon , B. Khélifi , W. Kluźniak , Nu. Komin , K. Kosack , D. Kostunin , A. Kundu , R. G. Lang , S. Le. Stum , A. Lemière , M. Lemoine-Goumard , J. -P. Lenain , A. Luashvili , J. Mackey , D. Malyshev , V. Marandon , R. Marx , A. Mehta , M. Meyer , A. Mitchell , R. Moderski , M. O. Moghadam , E. Moulin , M. de. Naurois , J. Niemiec , P. O'Brien , L. Olivera-Nieto , E. de. Ona. Wilhelmi , M. Ostrowski , S. Panny , M. Panter , R. D. Parsons , U. Pensec , S. Pita , G. Pühlhofer , M. Punch , A. Quirrenbach , S. Ravikularaman , M. Regeard , O. Reimer , H. Ren , B. Reville , F. Rieger , G. Rowell , B. Rudak , K. Sabri , V. Sahakian , H. Salzmann , A. Santangelo , M. Sasaki , J. Schäfer , F. Schüssler , H. M. Schutte , J. N. S. Shapopi , A. Sharma , S. Spencer , Ł. Stawarz , R. Steenkamp , S. Steinmassl , C. Steppa , T. Takahashi , T. Tanaka , M. Tsirou , C. van. Eldik , M. Vecchi , C. Venter , T. Wach , S. J. Wagner , A. Wierzcholska , A. A. Zdziarski , A. Zech , N. Żywucka

Cosmic filaments are thought to host a substantial fraction of the missing baryons at redshifts $z<2$. In this study, we constraint the baryonic content of these filaments using localized Fast Radio Bursts (FRBs). Filaments are identified…

Cosmology and Nongalactic Astrophysics · Physics 2025-11-04 Jian-Feng Mo , Weishan Zhu , Qi-Rui Yang , Yi Zheng , Long-Long Feng

Fast radio bursts (FRBs) are brief, energetic, extragalactic flashes of radio emission whose progenitors are largely unknown. Although studying the FRB population is essential for understanding how these astrophysical phenomena occur, such…

Fast radio bursts (FRBs) are mysterious extragalactic radio signals. Revealing their origin is one of the central foci in modern astronomy. Previous studies suggest that occurrence rates of non-repeating and repeating FRBs could be…

The dispersion measure (DM) of high-redshift $(z \gtrsim 6)$ transient objects such as Fast Radio Bursts can be a powerful tool to probe the intergalactic medium during the Epoch of Reionization. In this paper, we study the variance of the…

Cosmology and Nongalactic Astrophysics · Physics 2017-11-08 Shintaro Yoshiura , Keitaro Takahashi

We present GeMS/GSAOI observations of five fast radio burst (FRB) host galaxies with sub-arcsecond localizations. We examine and quantify their spatial distributions and locations with respect to their host galaxy light distributions,…

HII regions made of gas ionized by radiations from young massive stars, are widely distributed in the Milky Way. They are tracers for star formation, and their distributions are correlated with the Galactic spiral structure. Radio…

Astrophysics of Galaxies · Physics 2021-11-03 Chuan-Peng Zhang , Jin-Long Xu , Guang-Xing Li , Li-Gang Hou , Nai-Ping Yu , Peng Jiang

If Gamma-Ray-Bursts (GRBs) occur at high redshifts, then their bright afterglow emission can be used to probe the ionization and metal enrichment histories of the intervening intergalactic medium during the epoch of reionization. In…

Astrophysics · Physics 2009-10-31 Benedetta Ciardi , Abraham Loeb

The dispersion of extragalactic fast radio bursts (FRBs) can serve as a powerful probe of the diffuse plasma between and surrounding galaxies, which contains most of the Universe's baryons. By cross-correlating the dispersion of background…

Fast radio bursts (FRBs) are an emerging class of bright, highly dispersed radio pulses. Recent work by Thornton et al. (2013) has revealed a population of FRBs in the High Time Resolution Universe (HTRU) survey at high Galactic latitudes.…

Fast radio burst (FRB) is a type of extragalactic radio signal characterized by millisecond duration, extremely high brightness temperature, and large dispersion measure. It remains a mystery in the universe. Advancements in instrumentation…

High Energy Astrophysical Phenomena · Physics 2024-09-23 Qin Wu , Fa-Yin Wang

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

We model the Fast Radio Burst (FRB) dispersion measure (DM) distribution for the Five-hundred-meter Aperture Spherical Telescope (FAST) and compare this with the four FRBs published in the literature to date. We compare the DM distribution…

High Energy Astrophysical Phenomena · Physics 2022-03-18 W. R. Arcus , C. W. James , R. D. Ekers , R. B. Wayth

Fast radio bursts (FRBs) are bright, millisecond-duration radio pulses whose origins are unknown. To date, only one (FRB 121102) out of several dozen has been seen to repeat, though the extent to which it is exceptional remains unclear. We…

High Energy Astrophysical Phenomena · Physics 2018-07-11 Liam Connor , Emily Petroff
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