Stellar Spectra


Fig. 1. Spectrum of Sirius (type A0 Va). The star is on the left; wavelength increases to the right. Note the distinct but somewhat broad lines of hydrogen.
Fig. 2. Spectrum of Betelgeuse (type M2 Iab). The star is on the left; wavelength increases to the right. Note the profusion of molecular bands.
Fig. 3. Spectrum of Aldebaran (type K5 III). The star is on the left; wavelength increases to the right. Note the metal lines.
Fig. 4. Spectrum of Rigel (type B8 Ia). The star is on the left; wavelength increases to the right. Narrow hydrogen lines may be visible.
Fig. 5. Spectra of gamma Velorum (type WC7). The star is on the left, with a fainter companion; wavelength increases to the right. Note the brilliant emission lines!
Fig. 6. Spectrum of the Orion Nebula. The trapezium stars are on the left; wavelength increases to the right. Note that while the stars appear as streaks, an image of the nebula is still visible.

Joshua E. Barnes (barnes@ifa.hawaii.edu)

Last modified: February 9, 2004
http://www.ifa.hawaii.edu/~barnes/ASTR110L_F03/spectrastar.html