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Fast Radio bursts (FRBs), bright transients with millisecond durations at $\sim$ GHz and typical redshifts probably $>0.8$, are likely to be gravitationally lensed by intervening galaxies. Since the time delay between images of strongly…

Cosmology and Nongalactic Astrophysics · Physics 2018-10-16 Zhengxiang Li , He Gao , Xu-Heng Ding , Guo-Jian Wang , Bing Zhang

By assuming the inverse square law of solar wind plasma density as representative of other stars, it is shown that just outside a star the {\it outward} deflection of a passing radio signal at $\nu\approx 1$~GHz (which is capable of…

High Energy Astrophysical Phenomena · Physics 2025-08-11 Richard Lieu

Fast Radio Bursts (FRBs) are a class of highly energetic, mostly extragalactic radio transients lasting for a few milliseconds. While over 600 FRBs have been published so far, their origins are presently unclear, with some theories for…

Context: Fast Radio Bursts are transient radio pulses from presumably compact stellar sources of extragalactic origin. With new telescopes detecting multiple events per day, statistical methods are required in order to interpret…

Cosmology and Nongalactic Astrophysics · Physics 2021-01-20 Stefan Hackstein , Marcus Brüggen , Franco Vazza , Luiz F. S. Rodrigues

Fast Radio Bursts (FRBs) are enigmatic radio pulses whose origins are poorly understood. The dispersion measure of host galaxy (${\rm DM_{host}}$) provides critical insights into the local environment of FRB sources. In this study, we…

Astrophysics of Galaxies · Physics 2025-12-09 Yu Sang , Hai-Nan Lin

Six cases of fast radio bursts (FRBs) have recently been discovered. The FRBs are bright (~0.1 - 1 Jy) and brief (~ 1 ms) pulses of radio emission with dispersion measures (DMs) that exceed Galactic values, and hence FRBs have been…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Abraham Loeb , Yossi Shvartzvald , Dan Maoz

Five fast radio bursts (FRBs), including three apparently non-repeating ones FRB 180924, FRB 181112, and FRB 190523, and two repeaters, FRB 121102 and FRB 180916.J0158+65, have already been localized so far. We apply a method developed…

High Energy Astrophysical Phenomena · Physics 2020-05-27 Zhengxiang Li , He Gao , Jun-Jie Wei , Yuan-Pei Yang , Bing Zhang , Zong-Hong Zhu

The detection of six Fast Radio Bursts (FRBs) has recently been reported. FRBs are short duration ($\sim$ 1 ms), highly dispersed radio pulses from astronomical sources. The physical interpretation for the FRBs remains unclear but is…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Divya Palaniswamy , Randall B. Wayth , Cathryn M. Trott , Jamie N. McCallum , Steven J. Tingay , Cormac Reynolds

Measuring the Hubble constant (H$_0$) is one of the most important missions in astronomy. Nevertheless, recent studies exhibit differences between the employed methods. Fast radio bursts (FRBs) are coherent radio transients with large…

Cosmology and Nongalactic Astrophysics · Physics 2025-06-03 Tsung-Ching Yang , Tetsuya Hashimoto , Tzu-Yin Hsu , Tomotsugu Goto , Chih-Teng Ling , Simon C. -C. Ho , Amos Y. -A. Chen , Ece Kilerci

Fast radio bursts (FRBs) are astronomical transients with millisecond timescales occurring at cosmological distances. The observed time lag between different energies of each FRB is well described by the inverse-square law of the observed…

Fast radio bursts (FRBs) are increasingly being used for cosmological applications such as measuring the Hubble constant and baryon abundance. The increasing number of localized FRBs and precise measurement of dispersion measure (DM) make…

Cosmology and Nongalactic Astrophysics · Physics 2025-10-20 Sandeep Kumar Acharya , Paz Beniamini

The dispersion measure of fast radio bursts (FRBs), arising from the interactions of the pulses with free electrons along the propagation path, constitutes a unique probe of the cosmic baryon distribution. Their constraining power is…

Using the results of the IllustrisTNG simulation we estimate the dispersion measure which may be attributed to halos of so called host galaxies of fast radio bursts sources (FRBs). Our results show that in contradiction to assumptions used…

Astrophysics of Galaxies · Physics 2020-08-14 M. Jaroszynski

Galaxies and groups of galaxies exist in dark-matter halos filled with diffuse gas. The diffuse gas represents up to 80\% of the mass in baryonic matter within the halos(1,2), but is difficult to detect because of its low density (particle…

Astrophysics of Galaxies · Physics 2022-09-14 Liam Connor , Vikram Ravi

The distances of Fast Radio Burst (FRB) sources are currently unknown. We show that the 21-cm absorption line of hydrogen can be used to infer the redshifts of FRB sources, and determine whether they are Galactic or extragalactic. We…

High Energy Astrophysical Phenomena · Physics 2016-04-20 Ben Margalit , Abraham Loeb

When fast radio burst (FRB) waves propagate through the local (< 1 pc) environment of the FRB source, electrons in the plasma undergo large-amplitude oscillations. The finite-amplitude effects cause the effective plasma frequency and…

High Energy Astrophysical Phenomena · Physics 2020-08-10 Wenbin Lu , E. Sterl Phinney

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

FRB 121102 is the only known repeating fast radio burst source. Here we analyze a wide-frequency-range (1-8 GHz) sample of high-signal-to-noise, coherently dedispersed bursts detected using the Arecibo and Green Bank telescopes. These…

Fast Radio Bursts (FRBs) have become an indispensable tool for studying the Universe's ionisation properties, as well as its cosmological parameters. This is achieved by analysing their diffuse dispersion measure (${\rm DM}_{\rm diff}$) as…

High Energy Astrophysical Phenomena · Physics 2025-12-03 Marios Kalomenopoulos , Jiaming Zhuge

Ultralight bosonic wave dark matter (DM) is preponderantly contesting the conventional cold DM paradigm in predicting diverse and rich phenomena on small scales. For a DM halo made of ultralight bosons, the wave interference naturally…

Astrophysics of Galaxies · Physics 2025-04-30 Ran Gao , Shuxun Tian , Zhengxiang Li , He Gao , Kai Liao , Bing Zhang , Zong-Hong Zhu
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