Chemical abundances for A-and F-type supergiant stars

TL;DR

This study analyzes elemental abundances and stellar parameters of A--F-type supergiants using high-resolution spectra, identifying their evolutionary stages and population memberships, with new data for two stars and reaffirmed results for two others.

Contribution

First abundance analysis for HD 45674 and HD 224893, reaffirming previous results for HD 180028 and HD 194951, and insights into their evolutionary phases.

Findings

HD 45674, HD 194951, and HD 224893 are in post-1DUP phase.

Objects belong to the thin disc population.

HD 180028 shows typical Population I abundances but uncertain evolutionary status.

Abstract

We present the stellar parameters and elemental abundances of a set of A--F-type supergiant stars HD\,45674, HD\,180028, HD\,194951 and HD\,224893 using high resolution ($R$\,$\sim$\,42,000) spectra taken from ELODIE library. We present the first results of the abundance analysis for HD\,45674 and HD\,224893. We reaffirm the abundances for HD\,180028 and HD\,194951 studied previously by Luck (2014) respectively. Alpha-elements indicates that objects belong to the thin disc population. From their abundances and its location on the Hertzsprung-Russell diagram seems point out that HD\,45675, HD\,194951 and HD\,224893 are in the post-first dredge-up (post-1DUP) phase and they are moving in the red-blue loop region. HD~180028, on the contary, shows typical abundances of the population I but its evolutionary status could not be satisfactorily defined.