Image Details
Caption: Fig. 11.
Hδ/Fe I λ4045 vs. Ca II for [Fe/H] = −1.7. The trajectories are the same as in Fig. 9, but now the MC cluster index data are included. Clusters are placed on this and the subsequent Ca II figures based on their literature metallicity values given in Table 2. The dotted line is the trajectory for [Fe/H] = −0.4 with ages displayed as small labels, while the solid line is the track for [Fe/H] = −1.7 with large labels to mark the ages. All labelled ages are in gigayears. The two LMC clusters, NGC 2210 and NGC 1754, occupy the same region of the diagram as the Galactic globular M79. These two clusters may have blue horizontal‐branch stars contaminating their spectral indices (see text).
© 2003. The American Astronomical Society. All rights reserved. Printed in U.S.A.