The bimodal [Mg/Fe] versus [Fe/H] bulge sequence as revealed by APOGEE DR14
Context. The Galactic bulge has a bimodal metallicity distribution function: different kinematic, spatial, and, potentially, age distributions characterize the metal-poor and metal-rich components. Despite this observed dichotomy, which argues for different formation channels for those stars, the distribution of bulge stars in the ff-abundance versus metallicity plane has been found so far to be a
