Red clump stars from LAMOST and APOGEE reveal a localized North-South metallicity asymmetry in the outer Milky Way disk, stronger for younger stars, possibly linked to the Sagittarius dwarf's recent passage.
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A North-South Metallicity Asymmetry in the Outer Galactic disk -- Evidence for the Pericentric Passage of the Sagittarius Dwarf Galaxy
Red clump stars from LAMOST and APOGEE reveal a localized North-South metallicity asymmetry in the outer Milky Way disk, stronger for younger stars, possibly linked to the Sagittarius dwarf's recent passage.