Physical parameters of evolved stars in clusters and in the field from line-depth ratios
Astrophysics
2009-11-13 v1
Abstract
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.
Keywords
Cite
@article{arxiv.0704.1462,
title = {Physical parameters of evolved stars in clusters and in the field from line-depth ratios},
author = {K. Biazzo and L. Pasquini and A. Frasca and L. da Silva and L. Girardi and A. P. Hatzes and J. Setiawan and S. Catalano and E. Marilli},
journal= {arXiv preprint arXiv:0704.1462},
year = {2009}
}
Comments
4 pages, 1 figure, to appear in the Proceedings of the ESO Workshop "Precision Spectroscopy in Astrophysics", eds. L. Pasquini, M. Romaniello, N.C. Santos, A. Correia