We just found a way that 'invisible' gravity waves can literally turn into flashes of radio light in deep space.
April 17, 2026
Original Paper
Gravitational Gertsenshtein-Zeldovich mechanism for the Association between GW190425 and FRB 20190425A
arXiv · 2604.12775
The Takeaway
Gravity waves and light waves are usually two completely different things that don't talk to each other. But this paper proposes that when a gravity wave from a neutron star merger passes near a powerful magnetar, it can actually 'transform' into a radio burst. This 'Gertsenshtein-Zeldovich effect' provides a bridge between the two biggest mysteries in modern astronomy: Fast Radio Bursts and Gravitational Waves. It means that some of the light we see in the sky might actually be 'echoes' of gravity waves being converted by cosmic magnets. This gives us a 'universal translator' to see invisible gravitational events using regular radio telescopes.
From the abstract
The temporal and spatial coincidence between the gravitational wave (GW) event GW190425 and the fast radio burst (FRB) event FRB 20190425A raises the intriguing possibility of a physical connection between the two. The widely discussed possibility invoking the collapse of a supermassive neutron star as the merger product suffers the inconsistency between the model prediction and the measured inclination angle of the system. Here, we propose a novel physical mechanism to account for the associati