Tracing the evolutionary history of NGC1316 with GEMINI+GMOS

Data: 
12/12/2018 - 14:00 - 15:00
Local: 
Auditório "Prof. Dr. Paulo Benevides Soares", Bloco G

Tracing the evolutionary history of NGC1316 with GEMINI+GMOS

 
Leandro Sesto
IALP- Facultad de Ciencias Astronómicas y Geofísicas de La Plata, Argentina
 
Many studies have shown that GCs are tracers of the underlying starlight of their host galaxies in terms of chemical abundance, spatial distributions, and ages. In this talk, we are going to present a combination of photometry and multi-object spectroscopy of the inner zone of the GC system associated to NGC 1316 and a preliminary spectroscopic analysis of the stellar field component of this galaxy at different galactocentric radii. 
The giant elliptical galaxy NGC 1316 is the brightest galaxy in the Fornax cluster and displays a number of morphological features which indicate that this galaxy is a merger remnant.
Through photometric and spectroscopic observations, we confirmed the existence of multiple stellar populations associated with NGC 1316, where the presence of a dominant subpopulation of very young GCs, with an average age of 2 Gyr and relatively high metallicities stands out.
The results have been analyzed with the aim of describing the different episodes of star formation and thus design a more complete picture of the evolutionary history of the galaxy. We conclude that these pieces of evidence could be indicating that this galaxy has cannibalized one or more gas-rich galaxies, where the last fusion event occurred about 2 Gyr ago.