NLTE spectral analysis of helium-rich sdO stars from the southern HK survey.
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Author
Drilling, J.S.
Napiwotzki, R.
Dreizler, S.
Heber, U.
Beers, T.C.
Attention
2299/1419
Abstract
We have determined effective temperatures, surface gravities, and helium-to-hydrogen abundance ratios by fitting NLTE model atmospheres to high signal-to-noise- spectra of eight helium-rich sdO stars detected in the southern HK survey.