Abundances of light elements in metal-poor stars. IV. [Fe/O] and [Fe/Mg] and the history of star formation in the solar neighborhood

Raffaele Gratton, Eugenio Carretta, Francesca Matteucci +1

The accurate O, Mg and Fe abundances derived in previous papers of this series from a homogenous reanalysis of high quality data for a large sample of stars are combined with stell…