Program: GN-2017A-Q-26

The aim of this proposal is to perform the first deep (g',r',i') photometric study of the globular cluster (GC) system around the massive S0 galaxy NGC 3665, by means of GMOS-N images. Through color-color diagrams of the point-sources, we will select the GC candidates and study their color, radial, and azimuthal distributions. The turn-over of the luminosity function will be reached thanks to the deep photometry, and then total GC population, specific frequency, and a new distance to the galaxy will be calculated. Most of the studied GC systems in such environments present quite peculiar or "non-standard" properties. By means of the properties of the GC systems we are able to gather information on the singular evolutionary history of each galaxy, and compare it with those of early-type galaxies in high-density environments like clusters. Most of the GC systems in low-density environments studied in the past years presented quite peculiar or "non-standard" properties. In this sense, as NGC 3665 hosted a SNIa, we will seek for evidence of the presence of an intermediate-age population analyzing the GC color distribution. Also, we will investigate the dwarf galaxies close to NGC 3665, which have been detected but not studied so far.