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Astron. Astrophys. 324, 1091-1095


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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 Åand 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 +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 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


© European Southern Observatory (ESO) 1997

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