Bibcode
Piatti, Andrés E.; Sarajedini, Ata; Geisler, Doug; Gallart, Carme; Wischnjewsky, Marina
Bibliographical reference
Monthly Notices of the Royal Astronomical Society: Letters, Volume 381, Issue 1, pp. L84-L88.
Advertised on:
10
2007
Citations
38
Refereed citations
33
Description
We present the results on the age and metallicity estimates of the Small
Magellanic Cloud (SMC) clusters L110, L112 and L113 obtained from CCD
Washington CT1 photometry. We confirm L113 as a relatively
old and metal-poor cluster, and report for the first time that L110 and
112 are also relatively old clusters (t ~ 6.5 Gyr). Their derived ages
and metallicities reinforce previous suggestions that the farther a
cluster is from the centre of the galaxy, the older and more metal-poor
it is, with some dispersion. In addition, the bursting star formation
model still appears to be the most probable paradigm to describe the
SMC's star formation history. We call attention to a second possible
burst at ~6-7 Gyr, besides the known burst at ~3 Gyr.