Tracing the assembly history of NGC 1395

ESCUDERO, C. G.; FAIFER, F. R.; SMITH CASTELLI, A. V.; FORTE, J. C.; SESTO, L. A.; GONZALEZ, N. M.; SCALIA, M. C.

San Francisco

Congreso; Science and Evolution of Gemini Observatory 2018; 2018

Observatorio Internacional Gemini

In the scenario of galaxy formation, major fusions and tidal interactions play important roles. In the paradigm of hierarchical ΛCDM structure formation, massive early-type galaxies we see in the local Universe would have been built through a combination of two phases: in situ and ex situ formation (e.g., Oser et al. 2010). In the first phase (z ≳ 2), there is rapid in situ star formation driven by the infall of cold gas flows (Naab et al. 2009), followed by a largely quiescent evolution. The second phase (i.e. ex situ) is dominated mainly by successive accretion of smaller structures (Zolotov et al. 2010; Wellons et al. 2016). These two mechanisms should leave their signatures on the dynamics, chemistry, and kinematics of the galaxies, both in their inner regions and in their halos. In this context, globular clusters (GCs) have proved to be important tools for examing the early stages of galaxy formation, and also to trace major star forming episodes in a galaxy.