Stars on ancient prograde disk orbits show a distinct negative [Sc/Mg] versus [Fe/H] trend (slope -0.6 dex/dex), significantly different from the halo at 3.95σ, though the result is driven by a small number of stars.
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Detailed Abundance Determination of Metal-Poor Stars with X-Shooter II. - Chemically Disentangling the Halo, Disk and GSE
Stars on ancient prograde disk orbits show a distinct negative [Sc/Mg] versus [Fe/H] trend (slope -0.6 dex/dex), significantly different from the halo at 3.95σ, though the result is driven by a small number of stars.