Those mysterious, insanely bright radio flashes from deep space? They might just be normal signals that got a massive boost from a star’s gravity.
March 16, 2026
Original Paper
Gravitational self-lensing of Fast Radio Bursts in neutron star magnetospheres: II. Applications to strong repeaters and the CHIME population
arXiv · 2603.12386
The Takeaway
Fast Radio Bursts are so bright that they usually require extreme, cataclysmic explanations. This model suggests they are actually standard radio 'hotspots' on a neutron star that pass behind the star's own gravity, which acts like a massive magnifying glass to boost the signal into the blinding flashes we see.
From the abstract
Paper I in this series introduced a model in which seed radio bursts produced by a hotspot anchored in the magnetosphere of a highly-magnetic neutron star (NS) are greatly amplified by strong gravitational self-lensing and thus give rise to Fast Radio Bursts (FRBs). Key features of the FRB population such as the observed dichotomy between repeating and non-repeating sources, their large luminosities and the high-energy power-law distribution of their bursts naturally arise in the model from the