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Oxygen- and carbon-rich variable red giant populations in the Magellanic Clouds from EROS, OGLE, MACHO, and 2MASS photometry

Wisniewski, M; Marquette, J B; Beaulieu, J.-P; Schwarzenberg-Czerny, A; Tisserand, Patrick; Lesquoy, E.

Description

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]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
URI: http://hdl.handle.net/1885/69264
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201014319

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