In general, the narrower the spectral line of a star

A.the hotter the star is
B.the bigger the star is
C.the denser the star is
D.the smaller that star is
E.the cooler the star is

E. the cooler the star is .
Lower temperatures result less Doppler broadening of lines in the stellar atmosphere.

1 answer

Therefore, cooler stars typically have narrower spectral lines.