18) and, M supergiants and bright giants such as a Ori (M2 lab) (Ref. 19) and p Per (M4 II) (Ref. 18). Figure 1 (after Kaler, Ref. 20) shows an H-R diagram showing some of the stars where chromospheres are observed and is based onanbsp;...
|Title||:||Evolution in astrophysics|
|Author||:||Université Paul Sabatier|