An ancient system hidden in the Galactic plane?

Federico Sestito, Emma Fernandez-Alvar, Rebecca Brooks +19

We analyse high signal-to-noise ESPaDOnS/CFHT spectra of 20 very metal-poor stars (VMP; [Fe/H]~$<-2.0$) in the solar neighbourhood (within $\sim 2$ kpc), selected to be on planar or…