Izzo, L.L.IzzoMOLARO, PaoloPaoloMOLAROBonifacio, P.P.BonifacioDELLA VALLE, MassimoMassimoDELLA VALLECano, Z.Z.Canode Ugarte Postigo, A.A.de Ugarte PostigoPrieto, J. L.J. L.PrietoThöne, C.C.ThöneVanzi, L.L.VanziZapata, A.A.ZapataFernandez, D.D.Fernandez2022-07-152022-07-1520180035-8711http://hdl.handle.net/20.500.12386/32501We present high-resolution spectroscopic observations of the fast nova ASASSN-16kt (V407 Lup). A close inspection of spectra obtained at early stages has revealed the presence of low-ionization lines, and among the others we have identified the presence of the ionized <SUP>7</SUP>Be doublet in a region relatively free from possible contaminants. After studying their intensities, we have inferred that ASASSN-16kt has produced (5.9-7.7)× 10<SUP>-9</SUP> M<SUB>☉</SUB> of <SUP>7</SUP>Be. The identification of bright Ne lines may suggest that the nova progenitor is a massive (1.2 M<SUB>☉</SUB>) oxygen-neon white dwarf. The high outburst frequency of oxygen-neon novae implies that they likely produce an amount of Be similar, if not larger, to that produced by carbon-oxygen novae, then confirming that classical novae are among the main factories of lithium in the Galaxy. <P />STAMPAenArticle10.1093/mnras/sty435https://academic.oup.com/mnras/article/478/2/1601/48937222018MNRAS.478.1601IFIS/05 - ASTRONOMIA E ASTROFISICA