Bibcode
Piatti, A. E.; Geisler, D.; Sarajedini, A.; Gallart, C.
Referencia bibliográfica
Boletín de la Asociación Argentina de Astronomía, vol.52, p.125-128
Fecha de publicación:
2009
Número de citas
0
Número de citas referidas
0
Descripción
From C, T1 Washington photometry in the field of NGC 1697, SL 133, NGC
1997, SL 663, and OHSC 28, five mostly unstudied star clusters in the
LMC, we estimate the cluster radii, ages and metallicities. With the
exception of NGC 1697 (age = 0.7 Gyr, [Fe/H] = 0.0 dex), the remaining
four clusters are of intermediate-age (from 2.2 to 3.0 Gyr) and
relatively metal-poor ([Fe/H] = -0.7 dex). We combine our sample with 49
clusters with ages and metal- licities on a similar scale and examine
relationships between position in the LMC, age and metallicity. We
confirm previous results that clusters younger than 1 Gyr were formed
during an outside-in process; this occurred af- ter a burst of cluster
formation that took place mainly in the outer disk and peaked at 2 Gyr
ago. Finally, the cluster and field AMRs show evidence for a metallicity
offset but do overlap, particularly on the upper envelope side of the
cluster AMR.
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