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Linking insights into the Galactic disc, bulge and halo for a holistic approach to constraining the assembly of the Milky Way

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  • UserTed Mackereth, University of Toronto
  • ClockWednesday 02 September 2020, 14:00-15:00
  • Houseonline .

If you have a question about this talk, please contact Silvia Toonen.

Until recently, the limited extent of Galactic survey data has meant that we have commonly considered the components of the Milky Way in isolation from one another, concentrating on the bulge, bar, halo or disc, all of which are commonly divided into their own sub-components. The recent deluge of data from Galactic surveys (e.g Gaia, APOGEE , GALAH) has revealed a more complete view of our galaxy, and in turn warrants us now to make links between these components. In this talk I will propose that gaining strong constraints on the assembly history of the Milky Way is perhaps the most crucial step toward using Milky Way data to test general galaxy formation models. I will show that these constraints can be attained through this more `holistic’ view of the Galaxy, presenting novel results on the Galactic disc, bulge/bar and halo, and how they connect to provide deeper insights into the assembly of the Milky Way. I will propose how and why cosmological simulations provide the best means to test models which are built in this way, and how we can leverage these to provide strong predictions for the appearance of Milky Way analogues and their progenitors in local galaxy surveys and future high redshift studies, placing constraints on the assembly of structure and galaxy formation in general, using data in the near and far-field. Finally I will show new results enabled by precision asteroseismology, that reveal the detailed chronology of events in the assembly history Milky Way.

This talk is part of the Astrophysics Talks Series series.

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