Two chemically similar stellar overdensities on opposite sides of the plane of the Galactic disk

Two chemically similar stellar overdensities on opposite sides of the plane of the Galactic disk

Two chemically similar stellar overdensities on opposite sides of the plane of the Galactic disk, Published online: 26 February 2018; doi:10.1038/nature25490

Fourteen stars from stellar overdensities above and below the Galactic disk have the same elemental abundances as disk stars, suggesting that these stars originated in the disk, perhaps being removed during interaction with passing dwarf galaxies.
Source: Nature