Sabbi, Elena; Gallagher, John S; Tosi, Monica; Anderson, J; Nota, Antonella; Grebel, E.; Cignoni, M; Cole, A; Da Costa, Gary; Harbeck, Daniel; Glatt, Katharina; Marconi, M
We observed six fields of the Small Magellanic Cloud (SMC) with the Advanced Camera for Survey on board the Hubble Space Telescope in the F555W and F814W filters. These fields sample regions characterized by very different star and gas densities, and, possibly, by different evolutionary histories. We find that the SMC was already forming stars 12 Gyr ago, even if the lack of a clear horizontal branch suggests that in the first few billion years the star formation activity was low. Within the...[Show more]
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