Fluorine abundances in planetary nebulae

Details Fluorine abundances in planetary nebulae Fluorine abundances in planetary nebulae

2005-08-15

arxiv.org/abs/astro-ph/0508339v1

Astrophys.J.631:L61-L64,2005

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, accepted for publication in ApJ Letters

Scientific paper

10.1086/497113

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.

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