Paper:	Determining Element Abundances of [WC]-type Central Stars for Probing Stellar Evolution and Nucleosynthesis
Volume:	391, Hydrogen-Deficient Stars
Page:	95
Authors:	Todt, H.; Peña, M.; Hamann, W.-R.; Gräfener, G.
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.

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