NGC 5694: another extra-galactic globular cluster
link https://repositorio.uc.cl/handle/11534/81423account_box Mucciarelli, A.account_box Bellazzini, M.account_box Catelan, Márcioaccount_box Amigo, P.account_box Correnti, M.account_box Cortés, C.account_box Dalessandro, E.account_box D'Orazi, V.
Comparte este registro
We discuss the chemical composition of six giant stars of the outer Halo globular cluster NGC 5694, 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 NGC 5694, likely from a dwarf spheroidal galaxy....
Registro Sencillo
Registro Completo
| Autor | Mucciarelli, A. Bellazzini, M. Catelan, Márcio Amigo, P. Correnti, M. Cortés, C. Dalessandro, E. D'Orazi, V. |
| Título | NGC 5694: another extra-galactic globular cluster |
| Fecha de publicación | 2013 |
| Resumen | We discuss the chemical composition of six giant stars of the outer Halo globular cluster NGC 5694, 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 NGC 5694, likely from a dwarf spheroidal galaxy.... |
| Derechos | acceso restringido |
| Enlace | |
| Tipo de documento | preprint |