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Astron. Astrophys. 324, 1091-1095 (1997)

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Research Note

Stellar parameters from strong-line profiles: applications to Hyades cluster stars

G. Smith and M.J. Ruck

Department of Physics, Nuclear and Astrophysics Laboratory, Keble Road, Oxford, OX1 3RH, UK

Received 29 May 1996 / Accepted 13 February 1997

Abstract

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), [FORMULA] Tau (K0 III) and [FORMULA] Tau (K0 III) have been recorded at high resolution and with signal/noise [FORMULA]. 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 [FORMULA] 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 [FORMULA] about 2.5 but the surface gravity of [FORMULA] Tau is slightly lower than that of [FORMULA] Tau.

Key words: stars: fundamental parameters – stars: late-type – stars: abundances

Send offprint requests to: G. Smith

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© European Southern Observatory (ESO) 1997

Online publication: May 5, 1998

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