An international team reports on a radio pulsar phase of a Galactic magnetar that emitted a fast radio burst in 2020; observations suggest unique origins for “bursts” and “pulses,' which adds to FRB formation theory. More than 15 years after the discovery of fast radio bursts (FRBs) – millisecond
The Chinese Five-hundred-meter Aperture Spherical radio Telescope . Credit: Bojun Wang, Jinchen Jiang & Qisheng Cuiphase of a Galactic magnetar that emitted a fast radio burst in 2020; observations suggest unique origins for “bursts” and “pulses,” which adds to FRB formation theory.
This dichotomy in emission modes from the region of a magnetosphere helps astronomers understand how – and where – FRBs and related phenomena occur within our galaxy and perhaps also those at further cosmological distances.Radio pulses are cosmic electromagnetic explosions, similar to FRBs, but typically emit a brightness roughly 10 orders of magnitude less than an FRB. Pulses are typically observed not in magnetars but in other rotating neutron stars known as pulsars.
Zhang said the April 2020 FRB, and several later, less energetic bursts were emitted in random phases not within the pulse window identified in the pulsar phase.
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