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Preprint 10i/00

FUSE observation of the PG 1159-type central star K1-16

S. Miksa (1), J.L. Deetjen (1), S. Dreizler (1), F. Herwig (2), J.W. Kruk (3), T. Rauch (1), and K. Werner (1)

(1) Institut für Astronomie und Astrophysik, Astronomie, Universität Tübingen, Waldhäuser Str. 64, D-72076 Tübingen, Germany
(2) University of Victoria, BC, Canada
(3) Johns Hopkins University, Baltimore, MD, USA

To appear in: The 12th European Workshop on White Dwarfs, ASP Conference Series, Vol. xxx, 2001, H.L. Shipman and J.L. Provencal, eds.

Abstract. We present FUSE observations of the PG 1159-type central star of the planetary nebula K1-16 (Teff=140.000 K) covering the wavelength region 900-1188Å. Surprisingly, no Fe VII lines are detected. A preliminary analysis with a new set of metal line blanketed model atmospheres suggests an iron deficiency of 1-2 dex, however, detailed error estimates still need to be performed. We shortly discuss dust fractionation and s-process neutron-captures as origins for the possible iron-deficiency. We also announce the first identification of sulfur in a PG 1159 star.

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Paper (93k gzip'ed Postscript including figures)

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