Spectrophotometry of early type supergiants in the Large Magellanic Cloud.

Abstract

A sample of LMC supergiants ranging in type from O5 to A1 has been subjected to equivalent width measurements of major stellar features in the visible and UV spectral regions, using methods that are entirely numerical and to the greatest possible degree free from subjective estimates. LMC member results are compared with those obtained for their galactic counterparts. It is noted that O and early B supergiants of the LMC have smaller equivalent widths for Si IV 1400 and C IV 1550 than galactic supergiants of similar spectral type, and that middle and late B supergiant members of the LMC have He I line strengths that are lower than those of the corresponding classes in the Galaxy.