Ninety percent circular polarization detected in a repeating fast radio burst.

ABSTRACT: Fast radio bursts (FRBs) are extra-galactic sources with unknown physical mechanisms. They emit millisecond-duration radio pulses with isotropic equivalent energy of [Formula: see text]-[Formula: see text] ergs. This corresponds to a brightness temperature of FRB emission typically reaching the level of [Formula: see text] K, but can be as high as above [Formula: see text] K for sub-microsecond timescale structures, suggesting the presence of underlying coherent relativistic radiation mechanisms. Polarization carries key information to understand the physical origin of FRBs, with linear polarization usually tracing the geometric configuration of magnetic fields and circular polarization probing both intrinsic radiation mechanisms and propagation effects. Here we show that the repeating sou

SUBMITTER: Jiang J 

PROVIDER: S-EPMC11884807 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature