15 Vul, an evolved Am star, abundances

DOI

Understanding the evolution of metallic-line (Am) stars requires well determined atmospheric parameters and abundance patterns of the selected candidates. In this study, we presented a detailed abundance analysis of 15 Vul (HD 189849), identified as a marginal star, using a combination of equivalent width and spectrum synthesis techniques, under the LTE assumption. We compared our findings to previous analyses of the star, providing critique on both their results and our own. Our results suggest that although 15 Vul exhibits some underabundances of calcium and scandium, which are typically associated with stars, it might be more accurately identified as a normal A star in terms of its abundance pattern of all other elements and microturbulence velocity. The stars position on the HR diagram, along with our findings, may indicate that it is potentially a classical star that has evolved into the subgiant phase as a quasi-normal star. This may be the first identification of an evolved star.

Identifier
DOI http://doi.org/10.26093/cds/vizier.75373054
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/537/3054
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/537/3054
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/537/3054
Provenance
Creator Cay M.T.; Cay I.H.; Civelekler B.
Publisher CDS
Publication Year 2025
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy