The spectrum of EZ Canis Majoris (HD 50896) to the Lyman limit with the Hopkins Ultraviolet Telescope

A unique flux-calibrated spectrum, extending to the Lyman limit of the Wolf-Rayet star EZ CMa (also known as WR 6, HD 50896, spectral type WN5) has been recorded by the Hopkins Ultraviolet Telescope. We compare the spectrum to a pure He continuum model with the stellar parameters L * =10 5.2 L ○. , R * =4.5 R ○. T eff =57,000 K, V∞=1700 km s −1 , and M˙=10 −4 yr −1 . These parameters are very close to those derived by Hamann et al. (1988) from quantitative spectroscopy of ultraviolet, visual, and infrared He emission lines (although they represent only one solution from a locus of solutions that scale with distance)