[0905.3175] CN Variations in High Metallicity Globular and Open Clusters →
Sarah L. Martell, Graeme H. Smith :: We present a comparison of CN bandstrength variations in the high-metallicity globular clusters NGC 6356 and NGC 6528 with those measured in the old open clusters NGC 188, NCG 2158 and NGC 7789 (…) We find that the open clusters have narrow, unimodal distributions of CN bandstrength, as expected from the literature, while the globular clusters have broad, bimodal distributions of CN bandstrength, similar to moderate-metallicity halo globular clusters (…)
