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Preprint 01d/02

Fe-deficiency in H-deficient post-AGB stars due to n-capture nucleosynthesis

Falk Herwig (1), Maria Lugaro (2), Klaus Werner (3)

(1) University of Victoria, Victoria, BC, Canada
(2) IoA, University of Cambridge, Cambridge, UK
(3) Institut für Astronomie und Astrophysik, Astronomie, Universität Tübingen, Sand 1, D-72076 Tübingen, Germany

in: M. Dopita et al. (eds.): Planetary Nebulae: Their Evolution and Role in the Universe. ASP Conference Series, Vol. 2XX (2002)

Abstract. H-deficient post-AGB objects, e.g. PG1159 type star K1-16 and born-again AGB star Sakurai's object, have been reported to be significantly iron-deficient. We find that the iron deficiencies expected due to neutron-capture nucleosynthesis during either the progenitor AGB evolution and/or the neutron burst that occurs as a result of the rapid burning of protons during a post-AGB He-flash are generally in line with observations.

Key words: -

Paper (34k gzip'ed Postscript including figures)

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