Lugaro, Maria APols, O.R.Karakas, AmandaTout, Christopher A2015-12-070375-9474http://hdl.handle.net/1885/26021The post-Asymptotic Giant Branch (AGB) star HR4049 is in an eccentric binary system with a relatively short period probably surrounded by a dusty circumbinary disk. Extremely anomalous oxygen isotopic ratios, 16O/17O ≃ 16O/18O ≃ 7, have been measuredHR4049: signature of nova nucleosynthesis?200510.1016/j.nuclphysa.2005.05.1302015-12-07