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The Draco and Ursa Minor dwarf spheroidals. A comparative study
M. Bellazzini, F. R. Ferraro, L. Origlia +3
We present (V,I) photometry of two wide (~25 X 25 arcmin^2) fields centered on the low surface brightness dwarf spheroidal galaxies Draco and Ursa Minor. New estimates of the dista…
First detection of the RGB-bump in the Sagittarius dSph
L. Monaco, F. R. Ferraro, M. Bellazzini +1
We present V, I photometry of the Sagittarius Dwarf Spheroidal galaxy (Sgr) for a region of ~ 1^{circ} times 1^{circ}, centered on the globular cluster M 54. This catalog is the la…
Discovery of an accreted stellar system within the globular cluster omega Centauri
F. R. Ferraro, M. Bellazzini, E. Pancino
Recent wide-field photometric surveys (Lee et al.; Pancino et al.) have shown the existence of a previously unknown metal-rich ([Fe/H] -0.6) stellar population in the galactic glob…
High resolution spectroscopy of metal rich giants in omega Cen: first indication of SNe Ia enrichment
E. Pancino, L. Pasquini, V. Hill +2
We have obtained high-resolution, high S/N spectra for six red giants in omega Cen: three belonging to the recently discovered, metal-rich Red Giant Branch (RGB-a, Pancino et al. 2…