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The stellar halo of our Galaxy, as revealed by Gaia

Paola Di Matteo et Misha Haywood

Associated events

  • On Monday 10 December 2018 from 11:00 to 12:00

The Gaia DR2 has permitted to understand that the major part of what was thought to be the in-situ Galactic halo of the Milky Way is in fact the remnant of one important merger that probably occurred more than 9 Gyr ago. These results have opened new interesting questions: what are the characteristics of this accretion event ? Where is the in-situ Galactic halo ? How is it connected to the Galactic thick disk ? We will present these results and discuss the new perspective about the old stellar populations of our Galaxy.