Ramirez, I; Allende Prieto, C; Koesterke, Lars; Lambert, D.L.; Asplund, Martin
Aims. To explore the impact of surface inhomogeneities on stellar spectra, granulation models need to be computed. Ideally, the most fundamental characteristics of these models should be carefully tested before applying them to the study of more practical matters, such as the derivation of photospheric abundances. Our goal is to analyze the particular case of a K-dwarf.Methods. We construct a three-dimensional radiative-hydrodynamic model atmosphere of parameters Teff = 4820 K, log g = 4.5, and...[Show more]
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