The advent of the second data release of the Gaia mission, in combination with data from
large spectroscopic surveys, is revolutionizing our understanding of the Galaxy. Thanks to …

Our Galaxy, the Milky Way, is a benchmark for understanding disk galaxies. It is the only
galaxy whose formation history can be studied using the full distribution of stars from faint …

We use accurate estimates of aluminium abundance from the APOGEE Data Release 17
and Gaia Early Data Release 3 astrometry to select a highly pure sample of stars with …

In the ΛCDM paradigm, the Galactic stellar halo is predicted to harbor the accreted debris of
smaller systems. To identify these systems, the H3 Spectroscopic Survey, combined with …

Abstract The Gaia Sausage is the major accretion event that built the stellar halo of the Milky
Way galaxy. Here, we provide dynamical and chemical evidence for a second substantial …

Several lines of evidence suggest that the Milky Way underwent a major merger at z∼ 2 with
the Gaia-Sausage-Enceladus (GSE) galaxy. Here we use H3 Survey data to argue that GSE …

We investigate the nature of the double color–magnitude sequence observed in the Gaia
DR2 HR diagram of stars with high transverse velocities. The stars in the reddest-color …

Abstract The Galactic Archaeology with HERMES (GALAH) survey is a large high-resolution
spectroscopic survey using the newly commissioned High Efficiency and Resolution Multi …

Aims. We estimate the mass of the inner (< 20 kpc) Milky Way and the axis ratio of its inner
dark matter halo using globular clusters as tracers. At the same time, we constrain the …

The oldest, most metal-poor stars in the Galactic halo and satellite dwarf galaxies present an
opportunity to explore the chemical and physical conditions of the earliest star-forming …