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

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

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...324.1091s&link_type=abstract

Astronomy and Astrophysics, v.324, p.1091-1095

Astronomy and Astrophysics

Astrophysics

8

Stars: Fundamental Parameters, Stars: Late-Type, Stars: Abundances

Scientific paper

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 ɛ 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 ɛ Tau is slightly lower than that of γ Tau.

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