On the basis of the graph of absorption line strengths (in Figure 17-12), what is the spectral type of a star with the following spectral pattern: very strong He I lines, moderately strong H lines, weak Si III lines, and no Ca II, Fe II, or He II lines?

Question

Quizplus · Accepted Answer

The spectral pattern matches that of a B-type star, which typically has very strong He I lines, moderately strong H lines, weak Si III lines, and no Ca II, Fe II, or He II lines.

On the Basis of the Graph of Absorption Line Strengths