The disrupted chemical enrichment history of the Milky Way driven by gas accretion

arXiv:2607.21937 · astro-ph.GA · Submitted 2026-07-24 · Read on arXiv

Jianhui Lian, Qinhao Shao, Min Du, Hanyuan Zhang, Xinxin Duan, Xin Wang, Zheng Zheng

Yunnan Uni. · Yunnan Uni. · Xiamen Uni. · Uni. of Cambridge · Xiamen Uni. · UCAS · NAOC

astro-ph.GA

Submitted: 2026-07-24

Comments: 13 pages, 5 figures, accepted for publication in ApJ Letters

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Metallicity — 106× in this paper · explained in 3 episodes
• Abundance — 32× in this paper · explained in 1 episode
• Core — 3× in this paper · explained in 2 episodes
• Degeneracy — 1× in this paper · explained in 3 episodes
• Population Synthesis — 1× in this paper · explained in 2 episodes
• Robustness — 1× in this paper · explained in 5 episodes
• Trace — 1× in this paper · explained in 2 episodes
• Velocity Dispersion — 1× in this paper · explained in 2 episodes

Sources

• The origin of strong $\alpha$-element bimodalities in FIRE simulations of Milky Way-mass galaxies
• Stellar Migration and Chemical Enrichment in the Milky Way Disc: A Hybrid Model
• Orbital migration and heating history of the Galactic disc: a transition between the bimodal discs

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