text:   Metallicities and the Age-Metallicity Relations of Milky Way Progenitors",3,"[""Paper day! We've studied the effect of supernova self-enrichment in globular clusters (GCs) to figure out what the Milky Way's GCs looked like when they formed based on their current metallicity and iron abundance spread and/or mass. 1/3 <LINK>"", 'Self enrichment (a) makes GCs more metal-rich than the gas they originally formed from, and (b) introduces star-to-star variation in iron abundance. We can measure (b) and use it to correct for (a)! The correction is usually small, but can be up to 0.5 dex. 2/3 https://t.co/b06jmwKAAF', 'This allows us to get a more accurate view of how individual pieces of the Milky Way enriched themselves with heavy elements over time.\n\n""We"" = me + excellent undergrad researcher Ryker von Klar. Keep an eye out for his grad school apps next year! 3/3 https://t.co/iUslGfcytc']",21,10,771