Water isotopologues in the circumstellar envelopes of M-type AGB stars
Aims. In this study we intend to examine rotational emission lines of two isotopologues of water: H2 17O and H2 18O. By determining the abundances of these molecules, we aim to use the derived isotopologue - and hence oxygen isotope - ratios to put constraints on the masses of a sample of M-type AGB stars that have not been classified as OH/IR stars. Methods. We have used detailed radiative transfer analysis based on the accelerated lambda iteration method to model the circumstellar molecular...[Show more]
|Collections||ANU Research Publications|
|Source:||Astronomy and Astrophysics|
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