Characteristically highly polarized and continuous, it occurs when charged particles that are moving at speeds close to the speed of light when their paths are altered by magnetic fields.  
Quasars, electrons which move though the supernova remnant of the Crab Nebula, and electrons spiraling through the lines of force around the planet Jupiter all emit this type of radiation. Characteristically highly polarized and continuous, it occurs when charged particles that are moving at speeds close to the speed of light when their paths are altered by magnetic fields.  Because it is not dependant on the temperature of the objects which emit it, it is often called nonthermal radiation. FTP, identify this type of radiation named for devices, such as those found at Fermilabs and CERN, which produce it.
Quasars, electrons which move though the supernova remnant of the Crab Nebula, and electrons spiraling through the lines of force around the planet Jupiter all emit this type of radiation.
synchrotron radiation (prompt on "nonthermal" radiation)