'2 billion light-years away': Mysterious signals traced to a galaxy’s ancient edge

Produced by: Mohsin Shaikh

Representative pic

Mystery Signals

Fast radio bursts (FRBs) are fleeting, intense flashes of radio light, lasting mere milliseconds, baffling astronomers for years.

Representative pic

Magnetar Connection

These bursts are likely linked to magnetars—highly magnetic neutron stars—but much about their origin remains unknown.

Representative pic

Repeating Clues

FRB 20240209A, observed 21 times in 2024 by the CHIME telescope, provided rare data due to its repetitive bursts.

Pinpoint Source

Astronomers traced this FRB to a galaxy two billion light-years away, pinpointing its origin to the galaxy’s outer edge.

Representative pic

Old Galaxy

Surprisingly, the host galaxy is 11 billion years old and past its star-forming days, challenging the theory that FRBs stem from young magnetars.

Representative pic

Ancient Stars

The study proves that even old neutron stars—long thought inactive—can generate FRBs under certain conditions.

Representative pic

Merging Magnetars

One theory suggests the burst originated in a dense globular cluster where merging magnetars triggered the FRB.

Representative pic

Unexpected Diversity

The discovery reveals that FRBs are produced by more varied astrophysical processes than previously believed.

Representative pic

Next Steps

Astronomers are now focused on further observations to confirm whether stellar mergers are behind such repeating FRBs.

Representative pic