M35 lithium, rotation and metallicity

We have measured iron abundances, Li equivalent widths, and Li abundances for the 110 M35 members added to the existing sample by this study. Finally, rotation periods for cluster members have been obtained from the literature or derived from Zwicky Transient Facility light curves. As a result, we have confirmed that fast G and K rotators are Li-rich in comparison with slow rotators of similar effective temperature.

Furthermore, while we derived subsolar metallicity for M35 from our spectra, the distribution of Li in this cluster is similar to those observed for the Pleiades and M34, which have solar metallicity and slightly different ages. In addition, we have shown that an empirical relationship proposed to remove the contribution of the FeI line at 670.75nm to the blended feature at 670.78 nm overestimates the contribution of this iron line for M35 members.

We conclude that a 0.2-0.3dex difference in metallicity makes little difference in the Li distributions of open clusters with ages between 100 and 250Myr.