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Fast Radio Bursts
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Fast Radio Bursts
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The discovery of radio pulsars over a half century ago was a seminal moment in astronomy. It demonstrated the existence of neutron stars, gave a powerful observational tool to study them, and has allowed us to probe strong gravity, dense matter, and the interstellar medium. More recently, pulsar surveys have led to the serendipitous discovery of fast radio bursts (FRBs). While FRBs appear similar to the individual pulses from pulsars, their large dispersive delays suggest that they originate from far outside the Milky Way and hence are many orders-of-magnitude more luminous. While most FRBs appear to be one-off, perhaps cataclysmic events, two sources are now known to repeat and thus clearly have a longer-lived central engine. Beyond understanding how they are created, there is also the prospect of using FRBs -- as with pulsars -- to probe the extremes of the Universe as well as the otherwise invisible intervening medium. Such studies will be aided by the high implied all-sky event rate: there is a detectable FRB roughly once every minute occurring somewhere on the sky. The fact that less than a hundred FRB sources have been discovered in the last decade is largely due to the small fields-of-view of current radio telescopes. A new generation of wide-field instruments is now coming online, however, and these will be capable of detecting multiple FRBs per day. We are thus on the brink of further breakthroughs in the short-duration radio transient phase space, which will be critical for differentiating between the many proposed theories for the origin of FRBs. In this review, we give an observational and theoretical introduction at a level that is accessible to astronomers entering the field.
Forward citations
Cited by 11 Pith papers
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Dispersion Measure Distribution of Unlocalized Fast Radio Bursts as a Probe of the Hubble Constant
The DM distribution of unlocalized FRBs yields H0 = 73.8 +14.0/-12.3 km/s/Mpc with 18% uncertainty.
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Scattering of Strong Radio Waves by Particles in Strongly Magnetized Plasmas and Implications for Fast Radio Bursts
Relativistic single-particle scattering cross sections for strong electromagnetic waves in strongly magnetized plasma are computed for arbitrary polarization and angle, showing strong suppression and sub-unity optical...
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Interaction of Strong Electromagnetic Waves with Unmagnetized Pair Plasmas
Strong EM waves in pair plasmas are governed by nonlinearity parameter ε_p, producing attenuation over ε_p^{-2/3} wavelengths when small and shock formation when large.
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Probing Collapsed Dark Matter Halos with Fast Radio Bursts
Core-collapsed SIDM halos produce longer FRB image time delays than CDM halos, enabling future surveys to constrain self-interaction cross sections above roughly 18-40 cm²/g depending on collapse timing.
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Fast Radio Bursts produced during collapse of macroscopic X-mode in magnetized pair plasma
Nonlinear collapse of X-modes in magnetized pair plasma near current starvation produces short bright EM pulses identified as Fast Radio Bursts.
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Constraints on the baryon density from fast radio bursts using a non-parametric reconstruction of the Hubble parameter
FRB dispersion measures combined with non-parametric H(z) reconstruction yield Ω_b h² = 0.02236 ± 0.00090, agreeing with BBN and Planck CMB to within 0.05%.
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Dipole Radiation and Kinetic Mixing from Dark Photon Solitons
Dark photon solitons emit photons through external-field dipole radiation and kinetic mixing, offering a novel astrophysical signature for wave-like dark matter.
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Signatures of Two Distinct Epochs of FRB 20240114A from January to August 2024 Based on its Energy and Waiting Time Analysis
FRB 20240114A shows two epochs with distinct energy distribution indices and waiting time statistics, suggesting different burst types before and after March 21 2024.
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Low-frequency VLBI with the SKA-Low
LAMBDA proposes megameter-scale baselines using additional Australian stations to extend SKA-Low for high-resolution low-frequency VLBI.
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Gravitational particle production, the cosmological tensions and fast radio bursts
Gravitational vacuum polarization explains the Hubble tension by increasing direct H0 measurements while leaving indirect ones unaffected, does not impact the sigma8 tension, and predicts FRB measurements match CMB/BA...
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Fast Radio Bursts as Cosmological Probes
FRBs serve as cosmological probes via dispersion measure, scattering, and Faraday rotation to constrain baryon distribution, expansion history, magnetic fields, and fundamental physics effects.
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