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NGC 1817, NGC 2141, and Berkeley 81: three BOCCE clusters of intermediate age
P. Donati, G. Beccari, A. Bragaglia +2
In this paper we analyse the evolutionary status of three open clusters: NGC 1817, NGC 2141, and Berkeley 81. They are all of intermediate age, two are located in the Galactic anti…
Resolved photometry of Young Massive Clusters in the starburst galaxy NGC 4214
A. Sollima, M. Cignoni, R. G. Gratton +4
We present the results of deep high resolution imaging performed with ACS/HRC@HST in the most active region of the nearby starburst galaxy NGC 4214. We resolved the stellar populat…
Dwarf spheroidal satellites of M31: I. Variable stars and stellar populations in Andromeda XIX
Felice Cusano, Gisella Clementini, Alessia Garofalo +9
We present B,V time-series photometry of Andromeda XIX (And XIX), the most extended (half-light radius of 6.2') of Andromeda's dwarf spheroidal companions, that we observed with th…
Mean age gradient and asymmetry in the star formation history of the Small Magellanic Cloud
M. Cignoni, A. A. Cole, M. Tosi +5
We derive the star formation history in four regions of the Small Magellanic Cloud (SMC) using the deepest VI color-magnitude diagrams (CMDs) ever obtained for this galaxy. The ima…
The Star Formation History of the very metal poor BCD IZw18 from HST/ACS data
F. Annibali, M. Cignoni, M. Tosi +7
We have derived the star formation history (SFH) of the blue compact dwarf galaxy IZw18 through comparison of deep HST/ACS data with synthetic color magnitude diagrams. A statistic…