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The Physical Mechanisms of Fast Radio Bursts
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Fast radio bursts are mysterious millisecond-duration transients prevalent in the radio sky. Rapid accumulation of data in recent years has facilitated an understanding of the underlying physical mechanisms of these events. Knowledge gained from the neighboring fields of gamma-ray bursts and radio pulsars also offered insight. Here I review developments in this fast-moving field.Two generic categories of radiation model invoking either magnetospheres of compact objects (neutron stars or black holes) or relativistic shocks launched from such objects have been much debated. The recent detection of a Galactic fast radio burst in association with a soft gamma-ray repeater suggests that magnetar engines can produce at least some, and probably all, fast radio bursts. Other engines that could produce fast radio bursts are not required, but are also not impossible.
Forward citations
Cited by 6 Pith papers
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Fast Radio Bursts Trace Cosmic Star Formation with Little Delay
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.
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Universality in quasinormal modes of a magnetized black hole
For charged scalar perturbations of an Ernst-Schwarzschild black hole, the quasinormal-mode frequency scales as |q - q_c|^{1/2} near a critical charge q_c, with a mode-independent exponent.
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Constraints on Primordial Black Hole Dressed by Dark Matter Halo from Microlensing Effect of Fast Radio Bursts
A new conversion formula turns monochromatic bare-PBH microlensing bounds into extended-mass dressed-PBH bounds, and a 10^5-FRB forecast places f_PBH near 10^-4.
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Low-frequency observations of low-mass binary systems with neutron star candidates
A 111 MHz archival search finds no periodic radio emission from five compact-object binaries and one ambiguous 13 Jy, 0.13 s burst toward J1527+3536.
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On Ultra-long Period (53.8 min) Pulsar ASKAP J1935+2148: Coherent Radio Emission Triggered by Local Superstrong Magnetic Reconnection
Ultra-long period pulsars may be Crab-like pulsars spun down by particle winds, with their radio emission powered by local magnetic reconnection instead of rotation.
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H.E.S.S. programme searching for VHE gamma rays associated with FRBs
H.E.S.S. found no very high energy gamma-ray counterpart to targeted fast radio bursts, setting 99% confidence upper limits on their luminosity of 10^44 to 10^48 erg/s.
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