Globular clusters around massive elliptical galaxies in the Pegasus I group: clues about the early type galaxy formation.

FAIFER, F. R.; ESCUDERO, C. G.; FORTE, J. C.; SMITH CASTELLI, A. V.; GONZALEZ, N.; BASSINO, L. P

Buenos Aires

Workshop; Third Workshop on Numerical and Observational Astrophysics: Linking the Local Universe to the Early One.; 2014

Instituto de Astronomía y Física del Espacio

Pegasus I is a group of galaxies located at 50 Mpc, dominated by twoelliptical galaxies: NGC 7619 and NGC 7626. This group, though not very massive, is rich in late-type galaxies and represents an interesting environment to study several phenomena related to galaxy evolution (interactions, fusions, harrassment, etc.). Interestingly, there is evidence that the fusion of two sub-groups is taking place in Pegasus I. Therefore, it is expected that, in the future, the group will be dominated by one massive early-type object. In this context, we started the photometric study of the globular clusters associated to  the two dominant galaxies, and the dwarf galaxies around them, based on deep images obtained with GEMINI-GMOS. In this contribution we will present the first results of our project which aims at giving clues about the physical processes involved in the assembling of Pegasus I and, in particular, in the formation of massive early-type galaxies.