SGR-like behaviour of the repeating FRB 121102

Wang, F. Y.; Yu, Hai

doi:10.1088/1475-7516/2017/03/023

Cited by 94 publications

(69 citation statements)

References 55 publications

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“…This power-law index is shallower than that of the Crab giant pulses (β ∼ 2.1-3.5, Mickaliger et al 2012) but consistent with magnetar X-ray bursts (β ∼ 1.4-2.0, Turolla, Zane & Watts 2015) and other systems displaying self-organized criticallity (Katz 1986;Bak, Tang & Wiesenfeld 1987). This lends indirect support to the magnetar nature of FRB progenitors (as pointed out earlier by Lu & Kumar 2016;Wang & Yu 2017;Cheng, Zhang & Wang 2020).…”

Section: S U M M a Rysupporting

confidence: 83%

Implications of Canadian Hydrogen Intensity Mapping Experiment repeating fast radio bursts

Piro

Waxman

2020

Monthly Notices of the Royal Astronomical Society

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CHIME has now detected 18 repeating fast radio bursts (FRBs). We explore what can be learned about the energy distribution and activity level of the repeaters by fitting realistic FRB population models to the data. For a power-law energy distribution dN/dE∝E−γ for the repeating bursts, there is a critical index γcrit that controls whether the dispersion measure (DM, a proxy for source distance) distribution of repeaters is bottom or top-heavy. We find γcrit = 7/4 for Poisson wait-time distribution of repeaters in Euclidean space and further demonstrate how it is affected by temporal clustering of repetitions and cosmological effects. It is especially interesting that two of the CHIME repeaters (FRB 181017 and 190417) have large $\rm DM\sim 10^3\rm \, pc\, cm^{-3}$. These can be understood if: (i) the energy distribution is shallow $\gamma =1.7^{+0.3}_{-0.1}$ ($68\%$ confidence) or (ii) a small fraction of sources are extremely active. In the second scenario, these two high-DM sources should be repeating more than 100 times more frequently than FRB 121102, and the energy index is constrained to be $\gamma = 1.9^{+0.3}_{-0.2}$ ($68\%$ confidence). In either case, this γ is consistent with the energy dependence of the non-repeating ASKAP sample, which suggests that they are drawn from the same population. Finally, our model predicts how the CHIME repeating fraction should decrease with redshift, and this can be compared with observations to infer the distribution of activity level in the whole population.

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Section: S U M M a Rysupporting

confidence: 83%

Implications of Canadian Hydrogen Intensity Mapping Experiment repeating fast radio bursts

Piro

Waxman

2020

Monthly Notices of the Royal Astronomical Society

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“…Pertinently, the lack of observed correlation between burst wait times and energy ( Figure 6) is consistent with pulsar giant pulse emission (Karuppusamy et al 2010). Of relevance to magnetar related models, the lognormal shape of the burst wait time distribution from Figure 6 is also seen for soft gamma repeaters, which are a type of magnetar (Göǧüş et al 1999;Göǧüş et al 2000;Wang & Yu 2017).…”

Section: Burst Energies and Wait Timessupporting

confidence: 70%

A Sample of Low-energy Bursts from FRB 121102

Gourdji

Michilli

Spitler

et al. 2019

ApJL

181

214

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We present 41 bursts from the first repeating fast radio burst discovered (FRB 121102). A deep search has allowed us to probe unprecedentedly low burst energies during two consecutive observations (separated by one day) using the Arecibo telescope at 1.4 GHz. The bursts are generally detected in less than a third of the 580-MHz observing bandwidth, demonstrating that narrowband FRB signals may be more common than previously thought. We show that the bursts are likely faint versions of previously reported multi-component bursts. There is a striking lack of bursts detected below 1.35 GHz and simultaneous VLA observations at 3 GHz did not detect any of the 41 bursts, but did detect one that was not seen with Arecibo, suggesting preferred radio emission frequencies that vary with epoch. A power law approximation of the cumulative distribution of burst energies yields an index −1.8 ± 0.3 that is much steeper than the previously reported value of ∼ −0.7. The discrepancy may be evidence for a more complex energy distribution. We place constraints on the possibility that the associated persistent radio source is generated by the emission of many faint bursts (∼ 700 ms −1 ). We do not see a connection between burst fluence and wait time. The distribution of wait times follows a log-normal distribution centered around ∼ 200 s; however, some bursts have wait times below 1 s and as short as 26 ms, which is consistent with previous reports of a bimodal distribution. We caution against exclusively integrating over the full observing band during FRB searches, because this can lower signal-to-noise.

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“…A magnetar that emits bursts at irregular intervals is a soft gamma repeater (SGR). Although SGRs and FRBs share similar properties, such as: characteristic timescales, low duty factors and repetition Postnov, 2007, 2013; Thornton et al, 2013;Kulkarni et al, 2014;Lyubarsky, 2014;Yu, 2014;Pen and Connor, 2015;Katz, 2016b,c,d;Murase et al, 2016;Wang and Yu, 2017;Beloborodov, 2017;Metzger et al, 2017;Lieu, 2017), there is a crucial difference. SGRs are observed to be entirely thermal with frequencies above the X-ray range, whereas FRBs are observed in radio frequencies.…”

Section: Magnetar Wind Bubble (Clustered Flares)mentioning

confidence: 99%

A living theory catalogue for fast radio bursts

et al. 2019

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At present, we have almost as many theories to explain Fast Radio Bursts as we have Fast Radio Bursts observed. This landscape will be changing rapidly with CHIME/FRB, recently commissioned in Canada, and HIRAX, under construction in South Africa. This is an opportune time to review existing theories and their observational consequences, allowing us to efficiently curtail viable astrophysical models as more data becomes available. In this article we provide a currently up to date catalogue of the numerous and varied theories proposed for Fast Radio Bursts so far. We also launched an online evolving repository for the use and benefit of the community to dynamically update our theoretical knowledge and discuss constraints and uses of Fast Radio Bursts.

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SGR-like behaviour of the repeating FRB 121102

Cited by 94 publications

References 55 publications

Implications of Canadian Hydrogen Intensity Mapping Experiment repeating fast radio bursts

Implications of Canadian Hydrogen Intensity Mapping Experiment repeating fast radio bursts

A Sample of Low-energy Bursts from FRB 121102

A living theory catalogue for fast radio bursts

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