Course notes

These are all variations on the theme of solar and stellar spectrum formation. The first course is an in-depth treatment at masters astrophysics or graduate student level. The second course is an extensive text for beginning bachelor students physics and astronomy. The third course is a condensed version of the second, concentrating on the solar spectrum. The fourth course is a brief refresher for solar physicists.

Start with the second course if you don't know what the Wien approximation is. Start with the third course if you do know that but wonder about solar source functions. Try the first course if you need insight on the Lambda operator or NLTE radiative equilibrium. The last one teaches NLTE context to IRIS spectrometry.