The nature of fast radio bursts

Pen, Ue-Li

doi:10.1038/s41550-018-0620-z

Cited by 32 publications

(29 citation statements)

References 30 publications

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“…Ravi et al (2015)) have failed to find secondary bursts from the 60-70 other known FRBs (Petroff et al 2016). This is in contrast to the numerous theories of FRB origin, which, while perhaps now less numerous than the number of FRBs themselves, continues to grow (Pen 2018).…”

Section: Introductionmentioning

confidence: 87%

Limits on the population of repeating fast radio bursts from the ASKAP/CRAFT lat50 survey

James

2019

Monthly Notices of the Royal Astronomical Society

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A method is presented to limit the volumetric density of repeating fast radio bursts based on the number (or lack) of repeating bursts identified in a survey. The method incorporates the instantaneous sensitivity of the instrument, its beam pattern, and the dwell time per pointing, as well as the energy and timing distribution of repeat bursts. Applied to the Australian Square Kilometre Array Pathfinder's (ASKAP's) Commensal Real-time ASKAP Fast Transients (CRAFT) 'lat50' survey, the presence of an FRB similar to FRB 121102 is excluded within a volume of 1.9 · 10 6 Mpc 3 at 95% confidence level (C.L.). Assuming a burst energy cut-off at 10 42 erg, the 95% C.L. upper limit on the population density of repeating FRBs in the current epoch is 27 Gpc −3 , assuming isotropic (unbeamed) emission. This number is much lower than expected from even rare scenarios such as magnetar formation in gamma-ray bursts. Furthermore, the maximally allowed population under-predicts the observed number of single bursts in the survey. Comparisons with the observed dispersion measure distribution favours a larger population of less rapidly repeating objects, or the existence of a second population of non-repeating FRBs. In any scenario, FRB 121102 must be an atypical object.

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Section: Introductionmentioning

confidence: 87%

Limits on the population of repeating fast radio bursts from the ASKAP/CRAFT lat50 survey

James

2019

Monthly Notices of the Royal Astronomical Society

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“…Numerous theoretical models have been proposed to account for such an enigmatic class of radio transients. The number of models is almost comparable to that of the observed FRBs up to date [29,30]. Most of those progenitor models involve compact objects (e.g., Neutron Stars (NS), Black Holes (BH) and White Dwarfs(WD)) outside of the Milky Way.…”

Section: Introductionmentioning

confidence: 64%

Statistical properties of the repeating fast radio burst source FRB 121102

Li¹,

Li²,

Zhang³

et al. 2019

Int J Cosmol Astron Astrophys

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Currently, FRB 121102 is the only fast radio burst source that was observed to give out bursts repeatedly. It shows a high repeating rate, with more than one hundred bursts being spotted, but with no obvious periodicity in the activities. Thanks to its repetition, the source was well localized with a subarcsecond accuracy, leading to a redshift measurement of about 0.2. FRB 121102 is a unique source that can help us understand the enigmatic nature of fast radio bursts. In this study, we analyze the characteristics of the waiting times between bursts from FRB 121102. It is found that there is a clear bimodal distribution for the waiting times. While most waiting times cluster at several hundred seconds, a small portion of the waiting times are strikingly in the range of 2 -40 millisecond. More interestingly, it is found that the waiting time does not correlate with the burst intensity, either for the preceding burst or for the subsequent burst. It strongly indicates that the repeating bursts should be generated by some external mechanisms, but not internal mechanisms. As a result, the models involving collisions between small bodies and neutron stars could be competitive mechanisms for this interesting source. * libing@ihep.ac.cn †

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“…Some theoretical models considering that bursts are originated due to strong plasma turbulence within the jet of a massive black hole [45] or as synchrotron masers [37] have also been proposed, but these ones present a reduced observational support. In addition, there are a large number of speculative scenarios [7].…”

Section: Scenarios Explaining Frb 121102mentioning

confidence: 99%