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Fast radio bursts at the dawn of the 2020s

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arxiv 2107.10113 v2 pith:XH74QPE7 submitted 2021-07-21 astro-ph.HE astro-ph.CO

E. Petroff , J. W. T. Hessels , D. R. Lorimer This is my paper · ORCID
classification astro-ph.HEastro-ph.CO
keywords frbspopulationsourcesbursthostrepeatersreviewactivity
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Since the discovery of the first fast radio burst (FRB) in 2007, and their confirmation as an abundant extragalactic population in 2013, the study of these sources has expanded at an incredible rate. In our 2019 review on the subject we presented a growing, but still mysterious, population of FRBs -- 60 unique sources, 2 repeating FRBs, and only 1 identified host galaxy. However, in only a few short years new observations and discoveries have given us a wealth of information about these sources. The total FRB population now stands at over 600 published sources, 24 repeaters, and 19 host galaxies. Higher time resolution data, sustained monitoring, and precision localisations have given us insight into repeaters, host galaxies, burst morphology, source activity, progenitor models, and the use of FRBs as cosmological probes. The recent detection of a bright FRB-like burst from the Galactic magnetar SGR~1935+2154 provides an important link between FRBs and magnetars. There also continue to be surprising discoveries, like periodic modulation of activity from repeaters and the localisation of one FRB source to a relatively nearby globular cluster associated with the M81 galaxy. In this review, we summarise the exciting observational results from the past few years. We also highlight their impact on our understanding of the FRB population and proposed progenitor models. We build on the introduction to FRBs in our earlier review, update our readers on recent results, and discuss interesting avenues for exploration as the field enters a new regime where hundreds to thousands of new FRBs will be discovered and reported each year.

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Cited by 8 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 293 citations worldwide. Full citation record

  1. Interaction of Strong Electromagnetic Waves with Unmagnetized Pair Plasmas

    physics.plasm-ph 2026-04 unverdicted novelty 7.0 of 10

    The propagation length of strong electromagnetic waves through unmagnetized pair plasmas scales as ε_p^{-2/3}, where ε_p combines wave strength and frequency, verified by kinetic simulations.

  2. Fast Inference on Astronomical Time Series with Trans-Dimensional Flow Matching Posterior Estimation

    astro-ph.IM 2026-07 conditional novelty 6.0 of 10

    t-FMPE uses transformer-based flow matching to infer the number and parameters of pulses in astronomical light curves, producing posteriors comparable to MCMC but orders of magnitude faster.

  3. Fast Radio Bursts Trace Cosmic Star Formation with Little Delay

    astro-ph.HE 2026-07 conditional novelty 6.0 of 10

    Hierarchical Bayesian analysis of CHIME/FRB finds the FRB volumetric rate peaks with the cosmic star-formation history at mean delays of 0.1–0.3 Gyr, consistent with zero delay and ruling out multi-Gyr merger-like delays.

  4. Detection of Partial Coherence due to Multipath Propagation for FRB 20220413B with CHIME/FRB

    astro-ph.HE 2025-12 conditional novelty 6.0 of 10

    FRB 20220413B's components share a common Milky Way scintillation pattern but show no phase-coherent lensing signature, so the complex morphology is not confirmed as plasma lensing.

  5. Measurement of the Dispersion$\unicode{x2013}$Galaxy Cross-Power Spectrum with the Second CHIME/FRB Catalog

    astro-ph.CO 2025-06 conditional novelty 6.0 of 10

    FRB dispersion and foreground galaxy density are spatially correlated at 5.1 sigma, with a fitted plasma clustering cutoff near 0.9 Mpc, measured from 2,873 CHIME FRBs and about 6 million DESI galaxies.

  6. Semi-supervised morphological classification of fast radio bursts from the second CHIME/FRB catalogue

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    A simulation-trained convolutional autoencoder identifies three distinct FRB morphological classes and classifies repeatability with 86% recall.

  7. Constraining the Baryon Fraction in Extragalactic Diffuse Ionized Gas with 124 Localized Fast Radio Bursts

    astro-ph.CO 2025-06 conditional novelty 5.0 of 10

    Analyzing 92 localized FRBs with a Jacobian-corrected IGM dispersion PDF plus CMB, BAO, and supernova data gives f_IGM = 0.864 ± 0.041 (YMW16, ΛCDM); the abstract's '124 bursts, f_d > 90%' headline is not supported by...

  8. Pad\'e Approximants for cosmic Dispersion Measures

    astro-ph.HE 2025-12 conditional novelty 4.0 of 10

    Padé approximants reproduce the FRB diffuse dispersion measure integral to within a few percent while evaluating 2–17 times faster than numerical quadrature.

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