James Webb Space Telescope identifies most distant fast radio burst

Astronomers using the James Webb Space Telescope (JWST) have identified the host galaxy of the most distant fast radio burst (FRB) ever recorded with a known location. The signal, designated FRB 20240304B, was initially detected on March 4, 2024, by the MeerKAT radio telescope in South Africa.

JWST observations revealed that the burst originated from a small, young, star-forming dwarf galaxy. The signal traveled for over 11 billion years, emitted when the universe was approximately 3 billion years old. This discovery more than doubles the previous record for a burst with a confirmed host galaxy. While the findings suggest that young magnetars could be the source, the exact cause remains unproven.

In a separate observation, JWST detected a mysterious, bright infrared signal in the southern constellation Fornax. Despite extensive monitoring by the Hubble Space Telescope, no visible object appears at the source of this signal. The emission line is unique because it lacks accompanying lines, and its brightness suggests it was not present during previous observations, presenting a new mystery for researchers.