In a Milky Way analogue simulation, accreted stars from the last major merger retain a measurable memory of their birth radius: core-born stars are more bound and metal-rich, outer-born stars less bound and metal-poor, and standard selections miss the core.
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The chemodynamical memory of a major merger in a NIHAO-UHD Milky Way analogue -- I. A golden thread through time and space
In a Milky Way analogue simulation, accreted stars from the last major merger retain a measurable memory of their birth radius: core-born stars are more bound and metal-rich, outer-born stars less bound and metal-poor, and standard selections miss the core.