Fast radio bursts at the dawn of the 2020s

Petroff, E.; Hessels, J. W. T.; Lorimer, D. R.

doi:10.48550/arxiv.2107.10113

Cited by 23 publications

(40 citation statements)

References 119 publications

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“…Bursts with T B ≥ T B,cri are considered as "classical" FRBs. Since this critical value is unknown, tentatively we choose T B,cri = 10 33 K indicated by the plot of spectral luminosity-duration phase space (Keane 2018;Nimmo et al 2021;Petroff et al 2021). The influence of choosing different T B,cri will be discussed later in Section 3.…”

Section: Frb Classification By Brightness Temperaturementioning

confidence: 99%

“…In early years, doubt exists whether FRBs are astrophysical, until a new sample has been identified in 2013 (Thornton et al 2013). Ever since then this mysterious phenomenon starts to attract intense attention from the community with breakthroughs coming one after another (for reviews, see Katz 2018;Popov et al 2018;Petroff et al 2019;Cordes & Chatterjee 2019;Zhang 2020;Xiao et al 2021;Petroff et al 2021). One striking achievement is the discovery of the first repeating event FRB 20121102A in 2016 (Spitler et al 2016;Scholz et al 2016) and later the identification of its host galaxy (Chatterjee et al 2017;Marcote et al 2017;Tendulkar et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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New Insights into the Criteria of Fast Radio Burst in the Light of FRB 20121102A

Xiao,

Dai

2021

Preprint

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The total event number of fast radio bursts (FRBs) is accumulating rapidly with the improvement of existing radio telescopes and the completion of new facilities. Especially, the Five-hundred-meter Aperture Spherical radio Telescope (FAST) Collaboration has just reported more than one thousand bursts in a short observing period of 47 days (Li et al. 2021). The interesting bimodal distribution in their work motivates us to revisit the definition of FRBs. In this work, we ascribe the bimodal distribution to two physical kinds of radio bursts, which may have different radiation mechanisms. We propose to use brightness temperature to separate two subtypes. For FRB 20121102A, the critical brightness temperature is T B,cri ≃ 10 33 K. Bursts with T B ≥ T B,cri are denoted as "classical" FRBs, and further we find a tight pulse width-fluence relation (T ∝ F ν 0.306 ) for them. On the contrary, the other bursts are considered as "atypical" bursts that may originate from a different physical process. We suggest that for each FRB event, a similar dividing line should exist but T B,cri is not necessarily the same. Its exact value depends on FRB radiation mechanism and properties of the source.

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Section: Frb Classification By Brightness Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New Insights into the Criteria of Fast Radio Burst in the Light of FRB 20121102A

Xiao,

Dai

2021

Preprint

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“…FRBs have accurately measured dispersion measures (DMs), resulting from interaction with free electrons along the line of sight to their source [16,17,19]. Therefore, with a model for the free electron distribution in each FRB path, we can infer its redshift from the directly measured DM [20].…”

Section: A Redshift Width and Signal-to-noise Distributionsmentioning

confidence: 99%

Constraining Primordial Black Hole Dark Matter with CHIME Fast Radio Bursts

Krochek,

Kovetz

2021

Preprint

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Strong lensing of Fast Radio Bursts (FBRs) has been proposed as a relatively clean probe of primordial black hole (PBH) dark matter. Recently, the Canadian Hydrogen Intensity Mapping Experiment (CHIME) published a first catalog of 536 FRBs, 62 of which are from repeating sources. In light of this new data, we re-examine the prospects to constrain the abundance of PBHs via FRBs. Extending previous forecasts, we calculate a PBH dark matter bound using the intrinsic burst width and a calibrated flux-ratio threshold per FRB. In addition, we take into account the uncertainty in the relation between the FRB dispersion measure and source redshift. We outline an algorithm to detect lensed FRBs and a method to simulate its performance on real data and set a flux-ratio threshold for each event, which we use to infer realistic forecasts. We then attempt to extract a preliminary bound using the publicly available CHIME data. Unfortunately, both instrumental noise and the provided ∼ 1 ms time-resolution of the public data hinder this effort. We identify one candidate event where a double burst could be explained via strong lensing by a O(10 M )-mass PBH, which will require follow-up study at higher time resolution to either confirm or discard. We show that with a few times the size of the first catalog-sampled at the full instrumental timeresolution so that candidates can be efficiently scrutinized-CHIME will be able to find strong evidence for or robustly rule out PBHs with mass above ∼ 10 M as the dark matter. Finally, we demonstrate that stacking repeating FRBs can improve the constraints, especially for lower masses.

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“…Fast radio bursts (FRBs) are sub-ms radio pulses of extragalactic origin (Lorimer et al 2007;see Petroff et al 2019 andPetroff et al 2021 for the recent reviews). As the precise nature of FRBs is yet to be determined, dozens of theories abound to explain their properties (cf.…”

Section: What Can Psr B0950+08 Tell Us About Frbsmentioning

confidence: 99%

Dual-frequency single-pulse study of PSR B0950+08

Bilous,

Griessmeier,

Pennucci

et al. 2021

Preprint

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PSR B0950+08 is a bright non-recycled pulsar whose single-pulse fluence variability is reportedly large. Based on observations at two widely separated frequencies, 55 MHz (NenuFAR) and 1.4 GHz (Westerbork Synthesis Radio Telescope), we review the properties of these single pulses. We conclude that they are more similar to ordinary pulses of radio emission than to a special kind of short and bright Giant Pulses, observed from only a handful of pulsars. We argue that temporal variation of properties of interstellar medium along the line of sight to this nearby pulsar, namely the fluctuating size of decorrelation bandwidth of diffractive scintillation makes important contribution to observed single-pulse fluence variability. We further present interesting structures in the low-frequency single-pulse spectra that resemble the "sad trombones" seen in Fast Radio Bursts (FRBs); although for PSR B0950+08 the upward frequency drift is also routinely present. We explain these spectral features with radius-to-frequency mapping, similar to the model developed by Wang et al. (2019) for FRBs. Finally, we speculate that µs-scale fluence variability of the general pulsar population remains poorly known, and that its further study may bring important clues about the nature of FRBs.

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Fast radio bursts at the dawn of the 2020s

Cited by 23 publications

References 119 publications

New Insights into the Criteria of Fast Radio Burst in the Light of FRB 20121102A

New Insights into the Criteria of Fast Radio Burst in the Light of FRB 20121102A

Constraining Primordial Black Hole Dark Matter with CHIME Fast Radio Bursts

Dual-frequency single-pulse study of PSR B0950+08

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