Catalogue of Large Magellanic Cloud star clusters observed in the Washington photometric system

PALMA, T.; GRAMAJO, L. V.; CLARIÁ, J. J.; LARES, M.; GEISLER, D.; AHUMADA, A. V.

ASTRONOMY AND ASTROPHYSICS

EDP SCIENCES S A

Lugar: Paris; Año: 2016 vol. 586 p. 1 - 17

0004-6361

Aims: The main goal of this study is to compile a catalogue ofthe fundamental parameters of a complete sample of 277 star clusters(SCs) of the Large Magellanic Cloud (LMC) observed in the Washingtonphotometric system. A set of 82 clusters was recently studied by ourteam. Methods: All the clusters´ parameters such as radii,deprojected distances, reddenings, ages, and metallicities were obtainedby applying essentially the same procedures, which are briefly describedhere. We used empirical cumulative distribution functions to examineage, metallicity and deprojected distance distributions for differentcluster subsamples of the catalogue. Results: Our new sample of82 additional clusters represents about a 40% increase in the totalnumber of LMC SCs observed to date in the Washington photometric system.In particular, we report here the fundamental parameters obtained forthe first time for 42 of these clusters. We found that single LMC SCsare typically older than multiple SCs. Both single and multiple SCsexhibit asymmetrical distributions in log (age). We compared clusterages derived through isochrone fittings obtained using different modelsof the Padova group. Although ages obtained using recent isochrones areconsistent in general terms, we found that there is some disagreement inthe obtained values and their uncertainties.