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Paper: The Red Supergiants CO 1.62 micron and 2.29 micron Features
Volume: 147, Abundance Profiles: Diagnostic Tools for Galaxy History
Page: 201
Authors: Devost, Daniel; Origlia, Livia
Abstract: The modeled equivalent width (EW) of the CO(6-3) 1.62 micron and CO(2-0) 2.29 micron features are compared with the observed EW(CO) and age of young LMC star clusters. It is shown that evolutionary spectral synthesis predicts values of EW(CO) significantly lower than what is observed, specially for subsolar metallicity clusters. The observations are best fitted by forcing the temperature of the red supergiant (RSG) phase to be between 3500 and 4000 K and the fraction of time spent on the He burning phase to be at least 50%.
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