Iron Abundance in Hydrogen-Rich Central Stars of Planetary Nebulae

Details Iron Abundance in Hydrogen-Rich Central Stars of Planetary Nebulae Iron Abundance in Hydrogen-Rich Central Stars of Planetary Nebulae

2004-11-15

arxiv.org/abs/astro-ph/0411404v1

Astronomy and Astrophysics

Astrophysics

4 pages, to appear in "White Dwarfs", eds. D. Koester, S. Moehler, ASP Conf. Series

Scientific paper

We report on an on-going analysis of high-resolution UV spectra of hot hydrogen-rich central stars of planetary nebulae (CSPN), obtained with the Hubble Space Telescope and FUSE. Since UV spectra of many CSPN are dominated by Fe and Ni lines, we intend to use them as temperature indicators to check the CSPN temperature scale we have derived earlier from CNO ionization balances. Furthermore, the observed line strengths of heavy metals show large variations between different objects suggesting a possible spread in abundances. We will determine abundances of iron group elements by quantitative spectral analyses with non-LTE model atmospheres.

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