Paper:	Spectral Analysis of the sdO Standard Star Feige 34
Volume:	509, 20th European Workshop on White Dwarfs (EuroWD16)
Page:	219
Authors:	Latour, M.; Chayer, P.; Green, E. M.; Fontaine, G.
Abstract:	We present our current work on the spectral analysis of the hot sdO star Feige 34. We combine high S/N optical spectra and fully-blanketed non-LTE model atmospheres to derive its fundamental parameters (Teff, log g) and helium abundance. Our best fits indicate Teff = 63 000 K, log g = 6.0 and log N(He)/N(H) = –1.8. We also use available ultraviolet spectra (IUE and FUSE) to measure metal abundances. We find the star to be enriched in iron and nickel by a factor of ten with respect to the solar values, while lighter elements have subsolar abundances. The FUSE spectrum suggests that the spectral lines could be broadened by rotation.

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