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Abundances and ADFs in planetary nebulae with [WC] central stars

Published online by Cambridge University Press:  30 August 2012

Jorge García-Rojas ,
Miriam Peña ,
Cristophe Morisset  and
Maria-Teresa Ruiz
Jorge García-Rojas
Affiliation:
IAC, E-38200, La Laguna, Tenerife, Spain. email: [email protected]
Miriam Peña
Affiliation:
IA-UNAM. Apdo Postal 70264, Mex. D. F., 04510Mexico. email: [email protected], [email protected]
Cristophe Morisset
Affiliation:
IAC, E-38200, La Laguna, Tenerife, Spain. email: [email protected] IA-UNAM. Apdo Postal 70264, Mex. D. F., 04510Mexico. email: [email protected], [email protected]
Maria-Teresa Ruiz
Affiliation:
DAS. U. Chile. Casilla 36D, Santiago, Chile. email: [email protected]
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Abstract

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We present preliminary results obtained from the analysis of very deep echelle spectra of a dozen planetary nebulae with [WC] or weak emission lines (wels) central stars. The computed abundance discrepancy factors (ADFs) are moderate, with values lower than 4. In principle, no evidence of the H-poor metal enriched inclusions proposed by Liu et al. (2000) have been found. However, a detailed analysis of the data is in progress.

Keywords

stars: AGB and post-AGBISM: abundancesplanetary nebulae: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 364 - 365
Copyright
Copyright © International Astronomical Union 2012

References

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