A search for star clusters in the outskirts of the Large Magellanic Cloud: indication of clusters in the age gap
Cignoni, M.; Tosi, M.; Ripepi, V.; Marconi, M.; Bellazzini, M.; Cioni, M. -R. L.; Longo, G.; Schipani, P.; Dall'Ora, M.; Gatto, M.
Italy, Germany
Abstract
The YMCA (Yes, Magellanic Clouds Again) and STEP (The SMC in Time: Evolution of a Prototype interacting late-type dwarf galaxy) projects are deep g, i photometric surveys carried out with the VLT Survey Telescope (VST) and devoted to study the outskirts of the Magellanic System. A main goal of YMCA and STEP is to identify candidate stellar clusters and complete their census out to the outermost regions of the Magellanic Clouds. We adopted a specific overdensity search technique coupled with a visual inspection of the colour-magnitude diagrams to select the best candidates and estimate their ages. To date, we analysed a region of 23 square degrees in the outskirts of the Large Magellanic Cloud, detecting 85 candidate cluster candidates, 16 of which have estimated ages falling in the so-called age gap. We use these objects together with literature data to gain insight into the formation and interaction history of the Magellanic Clouds.