Table of Contents
ISRN Astronomy and Astrophysics
Volume 2014 (2014), Article ID 398182, 12 pages
http://dx.doi.org/10.1155/2014/398182
Research Article

CCD SDSS Photometry of Poorly Studied Star Clusters in the Large Magellanic Cloud

1Observatorio Astronómico, Universidad Nacional de Córdoba, Laprida 854, 5000 Córdoba, Argentina
2Consejo Nacional de Investigaciones Científicas y Técnicas, Avenida Rivadavia 1917, C1033AAJ Buenos Aires, Argentina

Received 19 November 2013; Accepted 18 March 2014; Published 11 May 2014

Academic Editors: M. Marconi and L. Pulone

Copyright © 2014 Andrés E. Piatti. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present for the first time CCD SDSS photometry, obtained at the Gemini South telescope with the GMOS attached, of stars in the field of the poorly studied star clusters NGC1768, HS 85, SL 676, NGC2107, NGC2190, and SL 866, which are distributed in the main body of the Large Magellanic Cloud. We applied a subtraction procedure to statistically clean the cluster CMDs from field star contamination. In order to disentangle cluster features from those belonging to their surrounding fields, we applied a subtraction procedure which makes use of variable cells to reproduce the field star color-magnitude diagrams (CMDs) as closely as possible. We then traced their stellar density radial profiles from star counts performed over the cleaned field stars dataset and derived their radii. Using the cleaned cluster CMDs, we estimated ages and metallicities from matching theoretical isochrones computed for the SDSS system. The studied star clusters have ages from 0.1 up to 2.0 Gyr and are of slightly metal-poor metal content (  dex).