Morel, Thierry[Osservatorio Astronomico di Palermo G. S. Vaiana, Istituto Nazionale di Astrofisica > > > >]
Forcada, J. S.[Astrophysics Division â Research and Science Support Department of ESA, ESTEC]
Favata, F.[Astrophysics Division â Research and Science Support Department of ESA, ESTEC]
Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites, ESO ASTROPHYSICS SYMPOSIA. ISBN 978-3-540-34135-2. Springer-Verlag, 2006, p. 31
[en] We have performed a detailed abundance analysis of six inactive K-type stars using high-resolution optical spectra. We have used three different techniques and compared the results obtained in order to establish their respective merits and faults. The two spectroscopic methods give consistent results suggesting that non- LTE effects are small, whereas the â mixedâ spectroscopic-photometric method leads to photospheric parameters and abundances systematically lower than those obtained with the other two. We have also determined the starsâ positions in H-R diagrams and made a comparison between the gravities derived from the ionization equilibrium of the iron lines and from the evolutionary tracks: the agreement is reasonably good.