Double white dwarfs as progenitors of R Coronae Borealis stars and type I supernovae
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...Here we follow this procedure but it is possible that a naked helium star is produced (Webbink 1984)....
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...…i.e., the merging of two C+O white dwarfs in a binary system with a combined mass exceeding the Chandrasekhar mass limit (e.g., Iben & Tutukov 1984; Webbink 1984) and (2) a single degenerate scenario, i.e., accretion of hydrogen or helium via mass transfer from a binary companion at a relatively…...
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...Double-degenerates as potential type Ia progenitors had many ups and downs in the past, beginning with the classic papers of Iben & Tutukov (1984) and Webbink (1984)....
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...5.3 Merging White Dwarfs The most obvious strength of the merging white dwarfs, or double-degenerate, scenario for SNe Ia (Webbink 1984, Iben & Tutukov 1984, Paczynski 1985) is the natural explanation for the lack of hydrogen in SN Ia spectra (Livio 1999) (cf Section 2.1)....
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