Red giants observed by CoRoT and APOGEE: The evolution of the Milky Way’s radial metallicity gradient
Red giants observed by CoRoT and APOGEE: The evolution of the Milky Way’s radial metallicity gradient
Using combined asteroseismic and spectroscopic observations of 418 red-giant stars close to the Galactic disc plane (6 kpc $<R_{\rm Gal}\lesssim13$ kpc, $|Z_{\rm Gal}|<0.3$ kpc), we measure the age dependence of the radial metallicity distribution in the Milky Way's thin disc over cosmic time. The slope of the radial iron gradient …