Modeling star formation bursts in a Milky Way disk with radial migration can reproduce the observed wiggles in the age evolution of the abundance gradient, but the burst times are set to match those wiggles.
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Recent star formation episodes in the Galaxy: impact on its chemical properties and the evolution of its abundance gradient
Modeling star formation bursts in a Milky Way disk with radial migration can reproduce the observed wiggles in the age evolution of the abundance gradient, but the burst times are set to match those wiggles.