text: 124,63,951717524122492928,749437811015704577,Ted Mackereth,"My latest efforts now on the arXiv (<LINK>, with @rcrain_astro and other fine folks), in which we study the origins of element abundance patterns like that of our Galaxy in the EAGLE simulations #MilkyWay <LINK> @rcrain_astro We show that galaxies with these patterns are rare in the sims (~5%), which is important to understand as we start to understand MW better with surveys like #Gaia In the paper, we relate this to an atypical dark matter accretion history in the galaxies that have these abund. trends - a prediction that can be tested in the MW",https://arxiv.org/abs/1801.03593,"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 accretion histories exhibit episodes of significant infall at both early and late times, with the former fostering more intense star formation than the latter. The shorter characteristic consumption timescale of gas accreted in the earlier episode suppresses its enrichment with iron synthesised by Type Ia SNe, resulting in the formation of a high-$\mathrm{[\alpha/Fe]}$ sequence. We find that bimodality in $\mathrm{[\alpha/Fe]}$ similar to that seen in the Galaxy is rare, appearing in approximately 5 percent of galaxies in our sample. We posit that this is a consequence of an early gas accretion episode requiring the mass accretion history of a galaxy's dark matter halo to exhibit a phase of atypically-rapid growth at early epochs. The scarcity of EAGLE galaxies exhibiting distinct sequences in the $\mathrm{[\alpha/Fe]}$-$\mathrm{[Fe/H]}$ plane may therefore indicate that the Milky Way's elemental abundance patterns, and its accretion history, are not representative of the broader population of $\sim L^\star$ disc galaxies. ",The origin of diverse $\alpha$-element abundances in galaxy discs,3,"['My latest efforts now on the arXiv (<LINK>, with @rcrain_astro and other fine folks), in which we study the origins of element abundance patterns like that of our Galaxy in the EAGLE simulations #MilkyWay <LINK>', '@rcrain_astro We show that galaxies with these patterns are rare in the sims (~5%), which is important to understand as we start to understand MW better with surveys like #Gaia', 'In the paper, we relate this to an atypical dark matter accretion history in the galaxies that have these abund. trends - a prediction that can be tested in the MW']",18,01,552