Chemical abundances and kinematics of a sample of metal-rich barium stars

TL;DR

This study analyzes the chemical abundances and kinematics of metal-rich barium stars using high-resolution spectroscopy, revealing their enrichment patterns and kinematic properties, and concluding they are not part of the bulge population.

Contribution

It provides detailed abundance patterns and kinematic analysis of metal-rich barium stars, highlighting their role in studying s-process enrichment at high metallicity.

Findings

Stars have [s/Fe] from 0.25 to 1.16.

Their abundance patterns are similar to other metal-rich stars.

They are not part of the bulge population.

Abstract

We determined the atmospheric parameters and abundance pattern for a sample of metal-rich barium stars. We used high-resolution optical spectroscopy. Atmospheric parameters and abundances were determined using the local thermodynamic equilibrium atmosphere models of Kurucz and the spectral analysis code MOOG. We show that the stars have enhancement factors, [s/Fe], from 0.25 to 1.16. Their abundance pattern of the Na, Al, alpha-elements, and iron group elements as well as their kinematical properties are similar to the characteristics of the other metal-rich and super metal-rich stars already analyzed. We conclude that metal-rich barium stars do not belong to the bulge population. We also show that metal-rich barium stars are useful targets for probing the s-process enrichment in high-metallicity environments.