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Unravelling clues on the evolution of S0 galaxies through kinematics of discrete tracers – Emilio Zanatta (IF/UFRGS)
22 de novembro de 2017: 12:30 - 14:00
Recovering the origins of lenticular galaxies can shed light on the understanding of galaxy evolution, since they present properties that can be found in both elliptical or spiral galaxies. In this presentation I will present our work on the kinematics of the globular cluster (GC) systems of three lenticular galaxies (NGC 2768, NGC 3115 and NGC 7457), and how we compare them with the kinematics of planetary nebulae (PNe). We performed the analysis using PNe and GC data from the Planetary Nebulae Spectrograph (PN.S) and the SLUGGS Survey. We modeled the galaxies’ kinematics using PNe as tracers of their stellar population. With this information and a spheroid-disk decomposition of the galaxies’ light from K-band images, we found the probability for a given GC to be compatible with its host galaxy as well as with its disk or spheroidal components separately. Overall we find that there is a great variety in the kinematics of the GC systems for the sample of S0 galaxies studied, suggesting that the evolutionary processes that lead to the formation of lenticular galaxies are also varied.