Bragaglia, AngelaCarretta, EugenioGratton, Raffaele G.Lucatello, SaraMilone, AntoninoPiotto, GD'Orazi, ValentinaCassisi, SSneden, ChrisBedin, L R2015-12-132041-8205http://hdl.handle.net/1885/79582We present the first chemical composition study of two unevolved stars in the globular cluster NGC 2808, obtained with the X-shooter spectrograph at VLT. NGC 2808 shows three discrete, well-separated main sequences. The most accepted explanation for thisKeywords: Globular clusters: general; Globular clusters: individual (NGC 2808); Stars: abundances; Stars: evolution; Stars: Population IIX-shooter observations of main-sequence stars in the globular cluster NGC 2808: First chemical tagging of a He-normal and a He-rich dwarf201010.1088/2041-8205/720/1/L412016-02-24