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Astro Seminar

The build-up of the Milky Way's stellar halo

Speaker: Azadeh Fattahi (Durham)
Date: Wednesday 3 March 2021
Time: 14:00
Venue: Zoom

The hierarchical nature of galaxy formation in the standard model of cosmology (LCDM) predicts a diffuse stellar halo component around Milky Way-mass galaxies, formed from the accretion and disruption of dwarf galaxies. Using cosmological hydrodynamical simulations, I will compare the properties of these destroyed dwarfs which are the building blocks of Galactic stellar halos, with those of existing satellites. I will discuss the radial build up of stellar halos from the accreted dwarfs and will connect these results with recent findings from the Gaia mission related to the major event in the formation history of the Milky Way.