Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-04-06
Mon.Not.Roy.Astron.Soc.360:375-379,2005
Astronomy and Astrophysics
Astrophysics
6 pages, 3 figures. Accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2005.09081.x
In the light of recent recalculations of the \el{19}{F}(alpha,p)\el{22}{Ne} reaction rate we present results of the expected yield of \el{19}{F} from Wolf-Rayet (WR) stars. We have computed models using the upper and lower limits for the rate in addition to the recommended rate and hence we constrain the uncertainty in the yield with respect to this reaction. We find a yield of 3.1x10^{-4}M_sol of \el{19}{F} with our recommended rate and a difference of a factor of two between the yields computed with the upper and lower limits. In comparison with previous work we find a difference in the yield of approximately a factor of 4, connected to a different choice of mass loss. Model uncertainties must be carefully evaluated in order to obtain a reliable estimate of the yield of fluorine from WR stars together with its uncertainties.
Görres Joachim
Lugaro Maria
Stancliffe Richard J.
Tout Christopher A.
Ugalde Claudio
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