Surface Inhomogeneities and Semi-Empirical Modeling of Metal-Poor Stellar Photospheres
The interpretation of detailed spectroscopic observations of different stars reveals inconsistencies, due likely to inadequacies of the underlying hypothesis. The high accuracy of the parallaxes measured by the Hipparcos satellite established a firm reference frame that is used here to test theoretical classical model atmospheres for cool stars
Allende Prieto, C.
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12
1998