A carbon star in the globular cluster Lindsay 102

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Carbon Stars, Globular Clusters, Magellanic Clouds, Stellar Spectra, Image Dissector Tubes, Stellar Evolution, Stellar Spectrophotometry

Scientific paper

The SMC globular cluster Lindsay 102 possesses a carbon star which is tentatively identified in light of its low-dispersion IDS spectrum as C5,4. The spectrum is in general found to contain many of the features illustrated in the higher-resolution spectra of LMC 65 and 229, with weak CN bands at 5753 A and 6206 A. Photometry of Lindsay yields V=14.82, and B-V=0.52, which, in combination with the cluster's large distance from the bar of the SMC, is used to infer that the age of the cluster is either intermediate, between 200 million and one billion years, or perhaps old, and greater than one billion years.

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