GMOS photometry of the globular cluster system in the peculiar galaxy NGC4753

LILIA P. BASSINO; JUAN PABLO CASO; MATIAS GÓMEZ

Toronto

Workshop; Future and Science of Gemini Observatory; 2015

Observatorio Gemini

NGC 4753 is an early-type galaxy with prominent and twisted dust lanes, at a distance of ~17Mpc. It is the brightest galaxy of one of the MK-groups (Makarov & Karachentsev) that populate the Virgo Southern Extension.Originally classified as a peculiar lenticular galaxy, it is now assigned an irregular de Vaucouleurs type I0. This latter classification points to a merger or a galaxy distorted by gravitational interaction with a close neighbour. The apparently high SNe Ia rate exhibited by this galaxy (NGC 4753 hosted SN 1965I and SN 1983G) may be an indication of an intermediate-age population, an stellar population that may have formed in a merger a few Gyrs ago.With the aim of disentangling the evolutionary story of this galaxy, we perform a deep g',r',i' photometric study of its globular cluster (GC) system. The GC colour distribution and the specific frequency are the keys to search for evidence of the existence of an intermediate-age population.