Canonical textbook on the subject of
radiation from astrophysical objects.
Authored by George B. Rybicki
and Alan P. Lightman
. The latter later left the field to
pursue a carrer as a writer and science journalist.
When an electron is accelerated it emits
electromagnetic radiation. This book delas with this
processes in every imaginable way, from relativisitc electons in
vaccuo to plasma exitations. It is a small book at 373
pages, but there is no fluff.