Localized ${}^{18}$O production in white dwarf mergers

Alexander Holas, Veronica Agaeva, Friedrich K. Roepke +5

The merger of a He white dwarf (WD) and a CO WD is the favored formation channel for R Coronae Borealis (RCB) stars. These stars exhibit ${}^{16}\mathrm{O}/{}^{18}\mathrm{O}$ ratio…