Globular cluster system of the NGC7626/NGC7619 pair of giant elliptical galaxies in the Pegasus I group

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

Garching

Workshop; Fornax, Virgo, Coma et al.: Stellar Systems in High Density Environments; 2011

European Southern Observatory

NGC 7619 and NGC 7626 are the two dominant elliptical galaxies in  the Pegasus I group (~50 Mpc). This group includes about 13 members and firm evidence that it hosts an ongoing merger. This kind of event is one of the most powerful ways of modifying the galaxies and group structure, morphologies and contents. The globular clusters (GCs) are known to be good tracers of the galaxies formation and evolution. In this context, we present the first complete analysis of the GC system (GCS) surrounding the NGC 7619/7626 pair, based on recently obtained deep Gemini+GMOS images in the g´, r´ and i´ bands. A mosaic of four fields has been taken along the line that joins both galaxies and high quality psf photometry has been achieved. We characterize the GC integrated colour distribution, studying the presence of bimodality, as well as the spatial projected distribution. The likely existence of some Ultra Compact Dwarf candidates is also considered.