Electromagnetic radiation emitted by a charged particle circling in a magnetic field substantially below the speed of light. It is named after the type of particle accelerator in which it was first observed. The radiation is circularly polarized and appears at a single frequency, the gyrofrequency, which is independent of the velocity of the particle. Cyclotron radiation has been detected from the magnetospheres of the outer planets. See also gyrosynchrotron radiation.
Subjects: Astronomy and Astrophysics.