Abundances and ADFs in planetary nebulae with [WC] central stars
Abstract
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.
- Publication:
-
Planetary Nebulae: An Eye to the Future
- Pub Date:
- August 2012
- DOI:
- 10.1017/S1743921312011441
- arXiv:
- arXiv:1109.1957
- Bibcode:
- 2012IAUS..283..364G
- Keywords:
-
- stars: AGB and post-AGB;
- ISM: abundances;
- planetary nebulae: general;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- Poster contribution (2 pages, 1 figure) to IAU Symposium 283: "Planetary Nebulae: An Eye to the Future" held in Puerto de la Cruz, Tenerife, Spain in July 25th-29th 2011