Abstract
Since 1984 it has been proposed that at least some highly-evolved stars are the product of the merger of a white-dwarf white-dwarf binary (WDB) system [31], [9]. The principle behind the idea is that orbital angular momentum is removed from the binary by means of gravitational radiation (GR) and that, within a Hubble timescale, the less massive white dwarf would come into contact with its Roche lobe and a catastrophic phase of mass transfer would begin. During the 1980’s, a serious and valid criticism was that there was no significant observable population of WDBs from which to form the number of supposed merger products. This situation changed during the 1990’s with the discovery [16] of substantial numbers of binary white dwarfs. Further discoveries are continuing as a result of large-scale white dwarf surveys [20].
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Jeffery, C.S., Saio, H. (2003). The Progeny of Binary White Dwarf Mergers. In: de Martino, D., Silvotti, R., Solheim, JE., Kalytis, R. (eds) White Dwarfs. NATO Science Series, vol 105. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0215-8_14
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