Question

Unit 2: Star Composition Lab Portfolio
19. It is a spectral type M star. Using the table above, what spectral features does Kapteyn's Star have?
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1 point
Helium, some hydrogen
Strong titanium oxide and some calcium
Hydrogen and ionized metals such as calcium and iron
Both metals and ionized metals, especially ionized calcium

Answer 1

Kapteyn's Star is classified as a spectral type M star. M stars are characterized by their cool temperatures and specific spectral features. Based on the characteristics of M stars, the correct answer for the spectral features of Kapteyn's Star would be:

**Strong titanium oxide and some calcium.**

This is because M stars typically exhibit strong titanium oxide (TiO) bands in their spectra, along with some absorption lines from metals like calcium.