Spectral analysis of the sdO standard star Feige 34
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.
Keywords
Cite
@article{arxiv.1610.01306,
title = {Spectral analysis of the sdO standard star Feige 34},
author = {M. Latour and P. Chayer and E. M. Green and G. Fontaine},
journal= {arXiv preprint arXiv:1610.01306},
year = {2016}
}
Comments
to be published by Astronomical Society of the Pacific Conference Series in the proceedings of the "20th European Workshop on White Dwarfs"