INVESTIGADORES
PIATTI Andres Eduardo
artículos
Título:
A new Extended Main Sequence Turnoff star cluster in the Large Magellanic Cloud
Autor/es:
PIATTI, ANDRÉS E.
Revista:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2013 vol. 430 p. 2358 - 2362
ISSN:
0035-8711
Resumen:
We present results on the age and metallicity estimates of the poorly studied LMC cluster SL,529, from CCD SDSS $gr$ photometry obtained at the Gemini South telescopewith the GMOS attached. The cluster MSTO region possesses anextended structure, with an age spread ($sim$ 0.5 Gyr) bigger than the mean age width of known EMSTO LMC clusters.We report for the first time a mean cluster age of 2.25 Gyr and a meancluster metallicity of Z=0.004, which place it as the most metal-poor and oldest cluster in the EMSTO LMC cluster group.In addition, the cluster RC appears tobe formed by two concentrations of stars - although it is not clear whether this feature can be caused, inpart, by binary interactions and mergers -,whereas the cluster core radius of 4.2 pc is in excellent agreement with those determined for the previously 12 known EMSTO LMC clusters.
