Name the spectral class of a star whose spectrum shows the following absorption lines: very strong Ca II lines; weak Fe I and Ca I lines; no He I,He II,or TiO lines.(Hint: Use the absorption line strengths shown in Figure 10-5 and Table 10-1 of Comins,Discovering the Essential Universe,6th ed.)
A) F
B) O
C) A
D) K

Question

Quizplus · Accepted Answer

The presence of very strong Ca II lines and weak Fe I and Ca I lines, along with the absence of He I, He II, or TiO lines, is characteristic of a K-type star.

Name the Spectral Class of a Star Whose Spectrum Shows