Yuxi Lu

Feb 11, 2025 | nature.com | Tiancheng Sun |Shaolan Bi |Yuqin Chen |Yuxi Lu |Chao Liu |Tobias Buck | +2 more

AbstractThe Milky Way underwent significant transformations in its early history, characterised by violent mergers and satellite galaxy accretion. However, recent observations reveal notable star formation events over the past 4 Gyr, likely triggered by perturbations from the Sagittarius dwarf galaxy. Here, we present chemical signatures of this accretion event, using the [Fe/H] (metallicity) and [O/Fe] (oxygen abundance) ratios of thin-disc stars.