Fluorine abundances in planetary nebulae
Astrophysics
2009-11-13 v1
Abstract
We have determined fluorine abundances from the F II 4789 and F IV 4060 nebular emission lines for a sample of planetary nebulae (PNe). Our results show that fluorine is generally overabundant in PNe, thus providing new evidence for the synthesis of fluorine in asymptotic giant branch (AGB) stars. [F/O] is found to be positively correlated with the C/O abundance ratio, in agreement with the predictions of theoretical models of fluorine production in thermally pulsing AGB stars. A large enhancement of fluorine is observed in the Wolf-Rayet PN NGC 40, suggesting that high mass-loss rates probably favor the survival of fluorine.
Keywords
Cite
@article{arxiv.astro-ph/0508339,
title = {Fluorine abundances in planetary nebulae},
author = {Y. Zhang and X-W. Liu},
journal= {arXiv preprint arXiv:astro-ph/0508339},
year = {2009}
}
Comments
4 pages, 3 figures, accepted for publication in ApJ Letters