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- W2034143195 abstract "Chemical abundances in five stars in M54, a globular cluster associated with the Sagittarius dwarf galaxy, have been determined using high-resolution echelle spectra. We find the cluster to have [Fe/H] = -1.55 and possibly halo-normal abundance patterns, although the [O/Fe] and [α/Fe] ratios lie between solar and the normal halo values. One star shows the combination of low oxygen and enhanced Na and Al, symptomatic of deep mixing of ON-cycle and other proton-capture products; a second star shows a lesser degree of O depletion unaccompanied by Na and Al excesses. In the cluster Eu is also enhanced, indicating that about 30% of the Ba in the cluster is due to the r-process. In general, M54 is similar to globulars of comparable metallicity in the inner Galactic halo, despite its clear association with the Sagittarius dwarf spheroidal." @default.
- W2034143195 created "2016-06-24" @default.
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- W2034143195 date "1999-09-01" @default.
- W2034143195 modified "2023-09-25" @default.
- W2034143195 title "Elemental Abundances in Five Stars in M54, A Globular Cluster Associated with the Sagittarius Galaxy" @default.
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- W2034143195 doi "https://doi.org/10.1086/300996" @default.
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