THE DIFFERENTIAL REDSHIFT OF TITANIUM LINES IN K STARS
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Published:2022-10-01
Issue:2
Volume:58
Page:173-180
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ISSN:0185-1101
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Container-title:Revista Mexicana de Astronomía y Astrofísica
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language:
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Short-container-title:RMxAA
Author:
Oostra B.1,
Vargas Muñoz P. C.1
Affiliation:
1. Departamento de Física, Universidad de los Andes, Bogotá, Colombia.
Abstract
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.
Publisher
Universidad Nacional Autonoma de Mexico
Subject
Space and Planetary Science,Astronomy and Astrophysics