Physical parameters of evolved stars in clusters and in the field from line-depth ratios

Details Physical parameters of evolved stars in clusters and in the field from line-depth ratios Physical parameters of evolved stars in clusters and in the field from line-depth ratios

2007-04-11

arxiv.org/abs/0704.1462v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, to appear in the Proceedings of the ESO Workshop "Precision Spectroscopy in Astrophysics", eds. L. Pasquini

Scientific paper

10.1007/978-3-540-75485-5_7

We present a high-resolution spectroscopic analysis of two samples of evolved stars selected in the field and in the intermediate-age open cluster IC 4651, for which detailed measurements of chemical composition were made in the last few years. Applying the Gray's method based on ratios of line depths, we determine the effective temperature and compare our results with previous ones obtained by means of the curves of growth of iron lines. The knowledge of the temperature enables us to estimate other fundamental stellar parameters, such as color excess, age, and mass.

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