Nucleosynthesis in AGB stars traced by oxygen isotopic ratios. I - Determining the stellar initial mass by means of the ${}^{17}$O/${}^{18}$O ratio

R. De Nutte, L. Decin, H. Olofsson +8

The aim of this paper is to investigate the ${}^{17}$O/${}^{18}$O ratio for a sample of AGB stars, containing M-, S- and C-type stars. These ratios are evaluated in relation to fundame…