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Title:
Abundances of Trace Elements in PG 1159 Stars
Authors:
Reiff, E.; Jahn, D.; Rauch, T.; Werner, K.; Kruk, J. W.; Herwig, F.
Publication:
15th European Workshop on White Dwarfs ASP Conference Series, Vol. 372, proceedings of the conference held 7-11 August, 2006 in Leicester, United Kingdom. Edited by Ralf Napiwotzki and Matthew R. Burleigh. San Francisco: Astronomical Society of the Pacific, 2007., p.237
Publication Date:
09/2007
Origin:
ASP
Bibliographic Code:
2007ASPC..372..237R

Abstract

We present results of a new spectral analysis of four hydrogen deficient post-AGB stars of the spectral type PG1159. We analysed high-resolution FUV spectra obtained with FUSE (Far Ultraviolet Spectroscopic Explorer) by means of NLTE model atmospheres in order to determine the abundances of light metals, e.g. silicon, phosphorus, and sulphur in the atmospheres of these objects. We compared our results to stellar evolution models and find consistent abundances for silicon and phosphorus, but for sulphur the observed strongly subsolar abundance cannot be explained.
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