Be stars in Messier 45
The spectra are taken with a LHIRES III spectrograph (at R=15000 - 2400 lines/mm grating), the September 05, 2006.
The Pleiades image is taken with a Canon 400 mm f5:6 lens and a Canon EOS 350D camera, the August 27, 2006 (click here for details).
Click here for enlarge.
Note: 17 Tau, 23 Tau, Eta Tau
and 28 Tau are well know Be stars. 27 Tau is a spectroscopic binary star.
Go to the Be stars page's