Wisniewski, M; Marquette, J B; Beaulieu, J.-P; Schwarzenberg-Czerny, A; Tisserand, Patrick; Lesquoy, E.
Context. The carbon-to-oxygen (C/O) ratio of asymptotic giant branch (AGB) stars constitutes an important index of evolutionary and environment/metallicity factor. Aims. We develop a method for mass C/O classification of AGBs in photometric surveys without using periods. Methods. For this purpose we rely on the slopes in the tracks of individual stars in the colour-magnitude diagram. Results. We demonstrate that our method enables the separation of C-rich and O-rich AGB stars with little...[Show more]
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