Determining element abundances of [WC]-type Central Stars for probing stellar evolution and nucleosynthesis

Details Determining element abundances of [WC]-type Central Stars for probing stellar evolution and nucleosynthesis Determining element abundances of [WC]-type Central Stars for probing stellar evolution and nucleosynthesis

2007-12-20

arxiv.org/abs/0712.3453v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, to appear in the ASP conference proceedings of "Hydrogen-deficient Stars" conference in 2007, editors: K.

Scientific paper

[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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