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Paper detail

NGC5694: another extra-galactic globular cluster

We discuss the chemical composition of six giant stars of the outer Halo globular cluster NGC5694, through the analysis of UVES@FLAMES high-resolution spectra. The cluster has an average iron content [Fe/H]=--1.83+-0.01, solar-scaled [alpha/Fe] ratios and a very low Ba abundance ([Ba/Fe]=--0.71+-0.06). These anomalous abundance patterns are different from those observed in other Halo globular clusters but similar to those of the metal-poor stars in typical dwarf spheroidal galaxies. These findings suggest an extra-galactic origin for NGC5694, likely from a dwarf spheroidal galaxy.

preprint2013arXivOpen access
A. MucciarelliM. BellazziniM. CatelanP. AmigoM. CorrentiC. CortésE. DalessandroV. D'Orazi
astro-ph.GA
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A. MucciarelliM. BellazziniM. CatelanP. AmigoM. CorrentiC. CortésE. DalessandroV. D'Orazi

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