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Spectral analysis of the He-enriched sdO-star HD 127493

Heber, Ulrich; Dorsch, Matti; Latour, Marilyn

The bright sdO star HD127493 is known to be of mixed H/He composition and excellent archival spectra covering both optical and ultraviolet ranges are available. UV spectra play a key role as they give access to many chemical species that do not show spectral lines in the optical, such as iron and nickel. This encouraged the quantitative spectral a…