Study of the global environment of small galaxy groups

FEDERICO DÁVILA KURBÁN; DRA. FERNANDA DUPLANCIC; DRA. GEORGINA COLDWELL

Congreso; XV Latin American Regional IAU Meeting Cartagena 2016; 2016

The present work presents a study of the global density environment of small galaxy groups. To this end we use a catalog of small galaxy systems constructed from the 10th Data Release of the Sloan Digital Sky Survey. To characterize the global environment of small galaxy groups we use different estimators, including the number of significant neighbors within a fixed aperture, the distance to the nearest neighbor and the number density profile of these systems. In order to perform a comparative study, we select different categories of systems considering galaxy pairs, triplets of galaxies and groups with at least four member galaxies. We found differences between the global environment of pairs compared to triplet of galaxies and groups. Galaxy pairs inhabit environments of lower global density than triplets and groups which are located in higher global density regions. This result is in agreement with different studies in the literature which propose that triplets of galaxies and compact groups have similarities in their fundamental properties and are different from galaxy pairs. Our findings suggest that the global density environment of small galaxy groups plays a fundamental role in the characterization of the main properties of these systems and their member galaxies.