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The origin of the Galactic halo as traced by globular clusters

Dr. Julio Carballo
Pontificia Universidad Católica de Chile

October 3rd, 2017


The assembly history of the stellar halo of our Galaxy might be encoded in the kinematics, metallicities, ages and spatial distribution of the tidal streams, remnants of accreted galaxies. Globular clusters have also played an important role in the study of the processes that led to the formation of our Galaxy. Moreover, the dual Galactic globular cluster system is considered a manifestation of its hierarchical formation in the context of the Lambda-CDM scenario. Wide-field imaging and spectroscopy are crucial tools to unveil the remnants of their progenitor dwarf galaxies, already assimilated by the Milky Way. In this talk, I will summarize the evidence on the presence of accreted globulars in the Galactic halo, gathered during the last decades. I will also present our results probing that the surroundings of Galactic globular clusters are still one of the best places to detect and characterize tidal streams in the Milky Way halo.