1997A&A...324.1091S

Profiles of the strong lines Ca II 8542 Å and Mg I 8806 Å in the spectra of the Hyades stars vB 37 (F4 V), vB 52 (G1 V), vB 64 (G6 V), vB 73 (G1 V), γ Tau (K0 III) and ε Tau (K0 III) have been recorded at high resolution and with signal/noise≥100. The usefulness of these lines as indicators of global metallicity and, in the cases of the late-type giant stars, surface gravity is illustrated. Our results support other recent spectral analyses which conclude that the Hyades cluster has a global metallicity of about +0.13 in logarithmic units relative to the Sun. We confirm that the star vB 52 is anomalous in having near-solar metallicity. We find that both giant stars have logg about 2.5 but the surface gravity of ε Tau is slightly lower than that of γ Tau.