Lithium evolution in intermediate age and old open clusters: NGC 752 revisited

Abstract

We present new high resolution spectroscopic observations of the intermediate age (~2 Gyr) open cluster NGC 752. We investigate the Li vs. Teff distribution and we obtain a new accurate determination of the cluster metallicity. We compare the results for NGC 752 with other intermediate age and old clusters spanning the age range from the Hyades (~0.6 Gyr) to NGC 188 (~6-8 Gyr). We find that NGC 752 has a solar iron content ([Fe/H]=+0.01+/-0.04), at variance with early reports of sub-solar metallicity. We find that NGC 752 is only slightly more Li depleted than the younger Hyades and has a Li pattern almost identical to that observed in the ~2 Gyr old IC 4651 and NGC 3680. As for the latter clusters, we find that NGC 752 is characterized by a tight Li vs. Teff distribution for solar-type stars, with no evidence for a Li spread as large as the one observed in the solar age solar metallicity M 67. We discuss these results in the framework of mixing mechanisms and Li depletion on the main sequence (MS). We conclude that the development of a large scatter in Li abundances in old open clusters might be an exception rather than the rule (additional observations of old clusters are required), and that metallicity variations of the order of ~0.2 dex do not affect Li depletion after the age of the Hyades.

A&A accepted, 10 pages, 5 ps figures

References in corpus (8)

• Abundances for Globular Cluster Giants: I. Homogeneous Metallicities for 24 Clusters
• Stellar Models with Microscopic Diffusion and Rotational Mixing II: Application to Open Clusters
• Lithium Depletion in Pre-Mainsequence Solar-Like Stars
• Detailed chemical composition of the open cluster IC 4651: The iron peak, alpha elements, and Li
• The evolution of lithium depletion in young open clusters: NGC 6475
• Evolution of lithium beyond the solar age: a Li survey of the old open cluster NGC 188
• UVES Be observations of early-G dwarfs in old clusters
• Lithium in Blanco1: Implications for Stellar Mixing

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