Globular clusters systems in groups of galaxies

FAIFER, F. R.; ESCUDERO, C.; SMITH CASTELLI, A. V.; FORTE, J. C.; CELLONE, S. A.; BASSINO, L. P.

Prato

Workshop; Small stellar systems in Tuscany; 2013

From mosaics built from deep g?, r?, i? images obtained with the GMOS cameras of Gemini-North and Gemini-South, we developed a photometric study of globular cluster systems (GCSs) belonging to the central regions of three groups of galaxies: NGC 5044, Pegasus I and HCG 44. These groups present very different properties and their GCSs are poorly studied. NGC 5044 is dominated by the giant elliptical galaxy NGC 5044 while Pegasus I is dominated by two elliptical galaxies (NGC 7619 and NGC7626). In addition, HGC 44 is a Hickson Compact Groups that contains late-type galaxies. We analyze and compare their total population of GCs, spatial distribution, luminosity functions, the presence of GC sub-populations showing diferences in color and/or luminosity, the existence of a "blue-tilt", UCDs, etc.In addition, as in the literature additional analysis with the same instrumental and photometric system are found, we compare our results with them. We aim at obtaining clues about the evolutive history of the galaxies of these groups.