Authors: Sven Buder, Karin Lind, Melissa K Ness, Diane K Feuillet, Danny Horta, Stephanie Monty, Tobias Buck, Thomas Nordlander, Joss Bland-Hawthorn, Andrew R Casey, Gayandhi M De Silva, Valentina D’Orazi, Ken C Freeman, Michael R Hayden, Janez Kos, Sarah L Martell, Geraint F Lewis, Jane Lin, Katharine J Schlesinger, Sanjib Sharma, Jeffrey D Simpson, Dennis Stello, Daniel B Zucker, Tomaž Zwitter, Ioana Ciucă, Jonathan Horner, Chiaki Kobayashi, Yuan-Sen Ting (丁源森), Rosemary F G Wyse

Venue: Monthly Notices of the Royal Astronomical Society

Type: Article

Abstract: Since the advent of Gaia astrometry, it is possible to identify massive accreted systems within the Galaxy through their unique dynamical signatures. One such system, Gaia-Sausage-Enceladus (GSE), appears to be an early ‘building block’ given its virial mass $\gt 10^{10}\, \mathrm{M_\odot }$ at infall (z ∼ 1−3). In order to separate the progenitor population from the background stars, we investigate its chemical properties with up to 30 element abundances from the GALAH+ Survey Data Release 3 (DR3). To inform our choice of elements for ... (read more)

DOI: 10.1093/mnras/stab3504