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The early merger that made the galaxy’s stellar halo

Published online by Cambridge University Press:  14 May 2020

N. Wyn Evans Open the ORCID record for N. Wyn Evans [Opens in a new window]
N. Wyn Evans*
Affiliation:
Institute of Astronomy, Madingley Rd, Cambridge CB3 0HA
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Abstract

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The last two years have seen widespread acceptance of the idea that the Milky Way halo was largely created in an early (8-10 Gyr ago) and massive (>1010Mȯ) merger. The roots of this idea pre-date the Gaia mission, but the exquisite proper motions available from Gaia have made the hypothesis irresistible. We trace the history of this idea, reviewing the series of papers that led to our current understanding.

Keywords

Galaxy: haloGalaxy: formationGalaxy structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S353: Galactic Dynamics in the Era of Large Surveys , June 2019 , pp. 113 - 120
Copyright
© International Astronomical Union 2020

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