nonthermal emission

nonthermal emission

(non-th'er -măl) (nonthermal radiation) Electromagnetic radiation, such as synchrotron emission, that is produced, like thermal emission, by the acceleration of electrons or other charged particles but is nonthermal in origin, i.e. its spectrum is not that of a perfect black-body radiator.
References in periodicals archive ?
In fact, the signal received from the Sun is more than 100 [degrees] and somewhat variable, owing to nonthermal emission associated with sunspots or active regions.