INVESTIGADORES
PIATTI Andres Eduardo
artículos
Título:
A search of extended Main Sequence Turnoff star clusters in the Large Magellanic Cloud"
Autor/es:
A.E. PIATTI; S.C. KELLER, A.D. MACKEY, G.D. DA COSTA
Revista:
Bol. Asociación Argentina de Astronomía
Editorial:
BAAA
Referencias:
Año: 2013 vol. 56 p. 265 - 268
ISSN:
1669-9521
Resumen:
We present Gemini South GMOS g, i photometry of 10 in-termediate age LMC star clusters, namely: NGC 2155, 2161, 2162, 2173,2203, 2209, 2213, 2231, 2249, and Hodge 6. Extensive artificial star testswere made over the observed field of view. These tests reveal the ob-served behaviour of photometric errors with magnitude and crowding.The cluster stellar density radial profiles were traced from star countsover the extent of the observed field. We adopt cluster radii and buildcolour-magnitude diagrams (CMDs) with cluster features clearly identi-fied; extended Main Sequence Turnoffs being possibly visible in a scarsenumber of studied clusters. We used the cluster (g, g − i) CMDs to es-timate ages and metallicities from the fit of theoretical isochrones. Thestudied LMC clusters are confirmed to be intermediate age clusters, whichrange in age 9.10 < log(t) < 9.60.
