Volume 395, Number 2, November IV 2002
|Page(s)||L35 - L38|
|Published online||14 November 2002|
Letter to the Editor
Cerium: The lithium substitute in post-AGB stars*
Departement Natuurkunde en Sterrenkunde, K.U. Leuven, Celestijnenlaan 200B, 3000 Leuven, Belgium
2 Astrophysique et Spectroscopie, Université de Mons-Hainaut, 7000 Mons, Belgium
3 Institut de Physique Nucléaire, Atomique et de Spectroscopie (IPNAS), Université de Liège, 4000 Liège, Belgium
Corresponding author: M. Reyniers, email@example.com
Accepted: 14 October 2002
In this letter we present an alternative identification for the line detected in the spectra of s-process enriched low-mass post-AGB stars around 6708 Å and which was interpreted in the literature as due to Li. Newly released line lists of lanthanide species reveal, however, the likely identification of the line to be due to a Ce ii transition. We argue that this identification is consistent with the Ce abundance of all the objects discussed in the literature and conclude that in none of the low-mass s-process enriched post-AGB stars there is indication for Li-production.
Key words: atomic data / line: identification / stars: AGB and post-AGB / stars: abundances / stars: chemically peculiar
© ESO, 2002
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