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2018 Fall Science Colloquia

Galactic Archeology in the Gaia Era

Presented by: Sergey Koposov (Carnegie Mellon University)
Category: Science Colloquia   Duration: 1 hour and 10 minutes   Broadcast date: October 31, 2018
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Title: Galactic Archeology in the Gaia Era Abstract: Galactic archaeology is the field that studies tiny remnants and traces of processes that lead to the formation of our Galaxy. In the past decade, this field was pushed forward by large imaging surveys, allowing us to detect large populations of faint dwarf galaxies around the Milky Way, discover new stellar streams and probe the Milky Way stellar halo in unprecedented detail. This year, however, this field was revolutionized by the arrival of Gaia astrometric dataset that for the first time offers a 3-D map of our Galaxy, as well as provides precise proper motions for more than a billion stars. In my talk, I will discuss some of the recent results and discoveries of various sub-structures in the Milky Way halo done before the arrival of the Gaia data as well as highlight some of the interesting fresh results obtained with the help of Gaia.