Star formation history of stellar systems in NGC 1316

FAIFER, F. R.; BARBOSA, C E; SESTO, L. A.; SMITH CASTELLI, A. V.; ESCUDERO, C. G.; REYNALDI, M. V.

Rosario

Congreso; 62 reunión Anual de la AAA; 2020

Universidad Nacional de Rosario

Galaxy mergers are often mentioned in the literature as ideal places to study diverse starbursts triggered during the fusion events. In that sense, the intermediate-age merger remnant NGC 1316, constitutes a perfect merger scenario to study complex large-scale star formation events in the Local Universe. This colossal galaxy, which dominates an important sub-group of the Fornax galaxy cluster, still shows the scars of its violent near past. In a series of previous works we confirmed the existence of a complex globular cluster system associated with NGC 1316. Using photometric and spectroscopic data, we found that the globular cluster system is dominated by the presence of an unusual young and metal-rich subpopulation. In addition, several objects in our sample seem to show similarities with some nuclei of early-type dwarf galaxies. Some of these objects could actually be stripped nuclei, possibly accreted during minor merger events. We will present an exhaustive study of the most outstanding stellar systems associated to this galaxy. Indeed, some of them appear to be composed of more than one stellar population. We will show the analysis of its most relevant physical properties and their star formation history, which we have obtained through the full spectral fitting technique. In this new approach we propose to obtain a more detailed picture of the recent past of this galaxy, and its different fusion events, which have given rise to a complex family of stellar systems.