Resumo

OOSTRA, Benjamin  e  VARGAS MUNOZ, Paula Catalina. The Differential Redshift of Titanium Lines in K Stars. Rev. mex. astron. astrofis [online]. 2022, vol.58, n.2, pp.173-180.  Epub 20-Mar-2023. ISSN 0185-1101.  https://doi.org/10.22201/ia.01851101p.2022.58.02.01.

We present measurements of line core positions in UVES spectra of a sample of K-type stars, using the technique of bisector tracing. In all but two of these stars we detect an excess redshift of Ti I lines with respect to Fe I lines. We explain this invoking the temperature-dependence of the line depths. We conclude that the granulation curve is not unique but depends on the chemical species.

Palavras-chave : convection; Sun; techniques.

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