Matches in SemOpenAlex for { <https://semopenalex.org/work/W4308248434> ?p ?o ?g. }
- W4308248434 endingPage "A17" @default.
- W4308248434 startingPage "A17" @default.
- W4308248434 abstract "Aims. Stars with strong enhancements of r-process elements are rare and tend to be metal-poor, generally with [Fe/H] < −2 dex, and located in the halo. In this work, we aim to investigate a candidate r-process enriched bulge star with a relatively high metallicity of [Fe/H] ~ − 0.65 dex and to compare it with a previously published r-rich candidate star in the bulge. Methods. We reconsidered the abundance analysis of a high-resolution optical spectrum of the red-giant star 2MASS J18082459-2548444 and determined its europium (Eu) and molybdenum (Mo) abundance, using stellar parameters from five different previous studies. Applying 2MASS photometry, Gaia astrometry, and kinematics, we estimated the distance, orbits, and population membership of 2MASS J18082459-2548444 and a previously reported r-enriched star 2MASS J18174532-3353235. Results. We find that 2MASS J18082459-2548444 is a relatively metal-rich, enriched r-process star that is enhanced in Eu and Mo, but not substantially enhanced in s -process elements. There is a high probability that it has a Galactic bulge membership, based on its distance and orbit. We find that both stars show r-process enhancement with elevated [Eu/Fe]-values, even though 2MASS J18174532-3353235 is 1 dex lower in metallicity. Additionally, we find that the plausible origins of 2MASS J18174532-3353235 to be either that of the halo or the thick disc. Conclusions. We conclude that 2MASS J18082459-2548444 represents the first example of a confirmed r -process enhanced star confined to the inner bulge. We assume it is possibly a relic from a period of enrichment associated with the formation of the bar." @default.
- W4308248434 created "2022-11-09" @default.
- W4308248434 creator A5004226024 @default.
- W4308248434 creator A5025090986 @default.
- W4308248434 creator A5028301941 @default.
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- W4308248434 creator A5039552721 @default.
- W4308248434 creator A5058242812 @default.
- W4308248434 creator A5058696335 @default.
- W4308248434 date "2022-12-23" @default.
- W4308248434 modified "2023-10-17" @default.
- W4308248434 title "First <i>r</i>-process enhanced star confirmed as a member of the Galactic bulge" @default.
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