UV Spectroscopy of the Central Star of the Planetary Nebula A43

Details UV Spectroscopy of the Central Star of the Planetary Nebula A43 UV Spectroscopy of the Central Star of the Planetary Nebula A43

2011-02-15

arxiv.org/abs/1102.3090v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 3 figures, part of the proceedings of the Asymmetric Planetary Nebulae V Conference in Bowness-on-Windermere, UK, Jun

Scientific paper

About 25% of all post-AGB stars are hydrogen-deficient, e.g. the PG1159 stars with a typical abundance pattern He:C:O = 33:50:17 (by mass). Only four of about 40 known PG1159 stars exhibit H in their spectra. The exciting star of the planetary nebula A43 is one of these so-called hybrid PG1159 stars. We present preliminary results of an on-going spectral analysis by means of NLTE model-atmosphere techniques based on UV spectra obtained with FUSE, HST/GHRS, and IUE as well as on optical observations.

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