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Galactic archaeology with Gaia

Wyse, Rosemary

Science (American Association for the Advancement of Science), 2019-09, Vol.365 (6457), p.979-980 [Periódico revisado por pares]

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Título:
Galactic archaeology with Gaia
Autor: Wyse, Rosemary
Assuntos: Acquisitions & mergers ; Archaeology ; Dwarf galaxies ; Galaxies ; Milky Way ; Satellites
É parte de: Science (American Association for the Advancement of Science), 2019-09, Vol.365 (6457), p.979-980
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Satellite data reveal the Milky Way's turbulent past The past and present merger activity of the Milky Way galaxy has recently been put into sharp focus through the analysis of data from the Gaia astrometric satellite. These data were released by the European Space Agency in 2016 (DR1) and 2018 (DR2). The emerging picture created is one of persistent disequilibrium, with high merger activity some 10 billion years ago that plausibly created the stellar halo and thick disk (see the figure), followed by a lull during which only lower-mass satellite galaxies were accreted. The Milky Way is now acquiring the Sagittarius dwarf galaxy, which is likely sculpting the galaxy's thin disk.
Editor: United States: The American Association for the Advancement of Science
Idioma: Inglês

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