Abstract
Understanding the origin of galaxies remains a topic of debate in the current astronomy. In this work, we have focused on lenticular (S0) galaxies located in low-density environments, using their associated globular cluster (GC) systems as a tool. Initially, we have started the study of three S0 galaxies—NGC 2549, NGC 3414 and NGC 5838—using photometric data in several filters obtained with the GMOS camera mounted on the Gemini North telescope. The different GC systems, as well as their host galaxies, have shown particular features, such as multiple GC subpopulations and low-brightness substructures. These pieces of evidence show that the mentioned galaxies have suffered several merger/interaction events, even the accretion of satellite companions, probably causing their current morphologies.
Highlights
One of the biggest challenges that persists in astronomy today is understanding how the galaxies we observe were formed
The presence of trimodal colour distributions has been observed in some massive galaxies [2,3,4], which would indicate that new globular cluster (GC) have been formed through merger events, and/or have been stripped off of smaller galaxies
As each history has a beginning, the beginning of the work presented here focused on the analysis of the GC systems associated with lenticular galaxies (S0) located in relatively low-density environments, such as groups and/or the field (Escudero et al, in preparation)
Summary
One of the biggest challenges that persists in astronomy today is understanding how the galaxies we observe were formed In this context, a fundamental aspect lies in identifying those influential factors in the formation and evolution of galaxies of a given morphological type. As each history has a beginning, the beginning of the work presented here focused on the analysis of the GC systems associated with lenticular galaxies (S0) located in relatively low-density environments, such as groups and/or the field (Escudero et al, in preparation). To this end, we have used excellent photometric data obtained with Gemini/GMOS through the filters g0 r 0 i0. This data set in itself constitutes an important contribution to the study of this type of galaxy, since it will serve as the starting point for future spectroscopic work, and will allow the different processes that govern the galaxies and their GC systems to be delineated
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