Comparative study of low-temperature opacities with GARSTEC models
Abstract
We present a comparative study of the effect of low-temperature opacities on stellar models up to the Red Giant branch (RGB), computed with the GARching STellar Evolution Code. We have used two sets of low-temperature opacities; {\AE}SOPUS ({\AE}) from the University of Padova and those from the Wichita State University group (F05). In the relevant range of temperatures for this study, log \k{appa}{\AE} < log \k{appa}F 05. Therefore, to compare stellar evolutionary tracks, we performed a solar calibration of the {\alpha}mlt, for each set of low-temperature opacities. After carrying such a calibration, we find that stellar evolutionary tracks are almost unaffected by the choice of low-temperature opacities, with largest variations of 25-30 K at the latest evolutionary stages of the RGB phase.
Keywords
Cite
@article{arxiv.2309.10490,
title = {Comparative study of low-temperature opacities with GARSTEC models},
author = {Pedro Diaz Reeve and Aldo Serenelli},
journal= {arXiv preprint arXiv:2309.10490},
year = {2023}
}