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We have monitored the pulse frequencies of the two soft gamma repeaters SGR 1806-20 and SGR 1900+14 through the beginning of year 2001 using primarily Rossi X-ray Timing Explorer Proportional Counter Array observations. In both sources, we…

Fast radio bursts (FRBs) were discovered only in 2007. However, the number of known events and sources of repeating bursts grows very rapidly. In the near future the number of events will be $\gtrsim 10^4$ and the number of repeaters…

High Energy Astrophysical Phenomena · Physics 2023-03-13 Popov S. B. , Pshirkov M. S.

The origin of fast radio bursts (FRBs) still remains a mystery, even with the increased number of discoveries in the last three years. Growing evidence suggests that some FRBs may originate from magnetars. Large, single-dish telescopes such…

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

Fast radio bursts are millisecond-duration radio pulses of extragalactic origin. A recent statistical analysis has found that the burst energetics of the repeating source FRB 121102 follow a power-law, with an exponent that is curiously…

High Energy Astrophysical Phenomena · Physics 2019-08-20 Arthur G. Suvorov , Kostas D. Kokkotas

Fast radio bursts (FRBs) are short pulses observed in radio frequencies usually originating from cosmological distances. The discovery of FRB 200428 and its X-ray counterpart from the Galactic magnetar SGR J1935+2154 suggests that at least…

High Energy Astrophysical Phenomena · Physics 2022-11-08 Mingyu Ge , Yuan-Pei Yang , Fangjun Lu , Shiqi Zhou , Long Ji , Shuangnan Zhang , Bing Zhang , Liang Zhang , Pei Wang , Kejia Lee , Weiwei Zhu , Jian Li , Xian Hou , Qiao-Chu Li

If gamma-ray bursts originate in our Galaxy, they probably involve violent disturbances in the magnetospheres of neutron stars. Any event of this kind is likely to trigger the sudden expulsion of magnetic flux and plasma at relativistic…

Astrophysics · Physics 2016-06-08 Mitchell C. Begelman , P. Meszaros , Martin J. Rees

Some fast radio bursts (FRBs) are expected to be associated with the afterglow emission of gamma-ray bursts (GRBs), while a short-lived, supermassive neutron star (NS) forms during the GRBs. I investigate the possible contributions to the…

Solar and Stellar Astrophysics · Physics 2014-11-14 Yun-Wei Yu

We present one possible mechanism for the giant flares of the Soft Gamma-Ray Repeaters (SGRs) within the framework of magnetar, i.e., superstrongly magnetized neutron star model, motivated by the positive period increase associated with the…

Astrophysics · Physics 2009-10-31 Kunihito Ioka

FRBs are puzzling, millisecond, energetic radio transients with no discernible source; observations show no counterparts in other frequency bands. The birth of a quark star from a parent neutron star experiencing a quark nova - previously…

High Energy Astrophysical Phenomena · Physics 2016-05-25 Zachary Shand , Amir Ouyed , Nico Koning , Rachid Ouyed

The puzzling mechanism of coherent radio emission remains unknown, but fortunately, repeating fast radio bursts (FRBs) provide a precious opportunity, with extremely bright subpulses created in a clear and vacuum-like pulsar magnetosphere.…

High Energy Astrophysical Phenomena · Physics 2023-12-12 Renxin Xu , Weiyang Wang

Soft gamma-ray repeaters and anomalous X-ray pulsars are a small (but growing) group of X-ray sources characterized by the emission of short bursts and by a large variability in their persistent flux. They are believed to be magnetars, i.e.…

High Energy Astrophysical Phenomena · Physics 2015-05-27 P. Esposito , N. Rea , R. Turolla , G. L. Israel , S. Zane , L. Stella , C. Kouveliotou , S. Mereghetti , A. Tiengo , D. Gotz , E. Gogus

Among more than 1000 known fast radio bursts (FRBs), only five sources - FRBs 20121102A, 20190520B, 20201124A, 20240114A and 20190417A - have confirmed associations with persistent radio sources (PRS). The observed quasi-steady emission is…

High Energy Astrophysical Phenomena · Physics 2026-03-10 Mukul Bhattacharya , Kohta Murase , Kazumi Kashiyama

Fast radio bursts (FRBs) at cosmological distances still hold concealed physical origins. Previously Liu (2018) proposes a scenario that the collision between a neutron star (NS) and a white dwarf (WD) can be one of the progenitors of…

High Energy Astrophysical Phenomena · Physics 2020-02-24 Xiang Liu

Magnetars are the most promising progenitors of Fast Radio Bursts (FRBs). Strong radio waves propagating through the magnetar wind are subject to non-linear effects, including modulation/filamentation instabilities. We derive the dispersion…

High Energy Astrophysical Phenomena · Physics 2022-02-09 Emanuele Sobacchi , Yuri Lyubarsky , Andrei Beloborodov , Lorenzo Sironi

On 2010 March 19, the Swift/Burst Alert Telescope triggered on a short burst with temporal and spectral characteristics similar to those of Soft Gamma Repeater (SGR) bursts. The source location, however, did not coincide with any known SGR.…

Gamma Ray Bursts (GRBs) are notorious for their diversity. Yet, they have a series of common features. The typical energy of their $\gamma$ rays is a fraction of an MeV. The energy distributions are well described by a ``Band spectrum'',…

Astrophysics · Physics 2009-11-10 Arnon Dar , A. De Rujula

Fast radio bursts (FRBs) are brief, intense flashes of radio waves from unidentified extragalactic sources. Polarized FRBs originate in highly magnetized environments. We report observations of the repeating FRB 20190520B spanning seventeen…

Fast radio bursts (FRBs) are sufficiently energetic to be detectable from luminosity distances up to at least seven billion parsecs (redshift $z > 1$). Probing the maximum energies and luminosities of FRBs constrains their emission…

Fast radio bursts (FRBs) are bright, energetic, radio pulses of extragalactic origin. A dichotomy has emerged in the population: some produce repeat bursts, while the majority do not. Most repeating sources only show rare repetitions, and…

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