Lithium survey in the solar age cluster M67

Abstract

We present atmospheric parameters, Li abundances, obtained from a detailed spectroscopic analysis, for a sample of stars with different evolutionary stages (turn–off, subgiant, giant stars) in the solar age cluster M67. Observations were carried out with high resolution ($R\sim47000$) at high S/N using the UVES${+}$FLAMES at VLT/UT2. From available photometry, computed synthetic spectra for the region around the Lithium line at 6707.78Å, we derived atmospheric parameters (T$_{\scriptsize\it eff}$, $\log g$, [Fe/H], $v\sin i$), A$_{Li}$ for each star, in order to better underst, the level of mixing, convective dilution of evolved stars in M67.