{"paper":{"title":"The origin of diverse $\\alpha$-element abundances in galaxy discs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Joop Schaye, J. Ted Mackereth, Matthieu Schaller, Ricardo P. Schiavon, Robert A. Crain, Tom Theuns","submitted_at":"2018-01-11T00:13:48Z","abstract_excerpt":"Spectroscopic surveys of the Galaxy reveal that its disc stars exhibit a spread in $\\mathrm{[\\alpha/Fe]}$ at fixed $\\mathrm{[Fe/H]}$, manifest at some locations as a bimodality. The origin of these diverse, and possibly distinct, stellar populations in the Galactic disc is not well understood. We examine the Fe and $\\alpha$-element evolution of 133 Milky Way-like galaxies from the EAGLE simulation, to investigate the origin and diversity of their $\\mathrm{[\\alpha/Fe]}$-$\\mathrm{[Fe/H]}$ distributions. We find that bimodal $\\mathrm{[\\alpha/Fe]}$ distributions arise in galaxies whose gas accreti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03593","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}