Determining element abundances of [WC]-type Central Stars for probing stellar evolution and nucleosynthesis
Abstract
[WC]-type CSPNs are hydrogen-deficient Central Stars of Planetary Nebulae showing strong stellar winds and a carbon-rich chemistry. We have analyzed new high-resolution spectra of [WC]-type CSPNs with the Potsdam Wolf-Rayet (PoWR) non-LTE expanding atmosphere models, using upgraded model atoms and atomic data. Previous analyses are repeated on the basis of the current models which account for iron-line blanketing. We especially focus on determining the chemical composition, including some trace elements like nitrogen which are of key importance for understanding the evolutionary origin of the hydrogen-deficient Central Stars.
Cite
@article{arxiv.0712.3453,
title = {Determining element abundances of [WC]-type Central Stars for probing stellar evolution and nucleosynthesis},
author = {H. Todt and M. Peña and W. -R. Hamann and G. Gräfener},
journal= {arXiv preprint arXiv:0712.3453},
year = {2007}
}
Comments
4 pages, 3 figures, to appear in the ASP conference proceedings of "Hydrogen-deficient Stars" conference in 2007, editors: K. Werner and T. Rauch