All the colours of sky (continued)
- Synchrotron radiation – Non-thermal processes
Relativistic electrons
in a relatively weak magnetic field (10-6
– 10-4 Gauss) move on helicoidal
trajectories, emitting
electromagnetic waves. The peak of emission depends both on the energy of the electrons and the
magnetic field strength and is typically in the range of radio waves.
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| Fig. 1: A charged particle moving in a magnetic field emits electromagnetic waves. |
Relativistic electrons are emitted in violent phenomena such as the
explosion of
supernovae
The radio sky shows the result of
spectacular violent processes of galactic dimensions! or
the activity of
galactic nuclei,where
matter accretes onto massive
black holes
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