Bibcode
DOI
Strader, Jay; Brodie, Jean P.; Forbes, Duncan A.; Beasley, Michael A.; Huchra, John P.
Referencia bibliográfica
The Astronomical Journal, Volume 125, Issue 3, pp. 1291-1297.
Fecha de publicación:
3
2003
Número de citas
58
Número de citas referidas
55
Descripción
We present low-resolution, integrated Keck spectra of the five globular
clusters (GCs) of the Fornax dwarf spheroidal galaxy. We find a
tentative age spread among the clusters, with the GC H5 younger by 2-3
Gyr than the others. The clusters generally appear to be very metal-poor
([Fe/H]~-1.8), with the cluster H4 slightly more metal-rich at
[Fe/H]=-1.5. We speculate that cluster H4 is similar to the Galactic GC
Ruprecht 106, which lacks the [α/Fe] enhancement typical among
metal-poor GCs in the Milky Way. High-resolution spectroscopy of
individual cluster and field stars will be needed to sort out the
surprisingly complex history of GC formation and evolution in this
galaxy.