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| Paper: |
Metal Abundances in Hot DO White Dwarfs: RE 0503–289 and KPD 0005+5106 |
| Volume: |
469, 18th European White Dwarf Workshop (EUROWD12) |
| Page: |
161 |
| Authors: |
Werner, K.; Rauch, T.; Ringat, E.; Kruk, J. W. |
| Abstract: |
The relatively high abundance of carbon in the hot DO
white dwarf RE 0503–289 indicates that it is a descendant of a PG 1159
star. This is corroborated by the recent detection of the extremely high abundances of
trans-Fe elements which stem from s-process nucleosynthesis in the precursor AGB
star, dredged up by a late He-shell flash and possibly amplified by radiative
levitation. On the other hand, the hottest known DO white dwarf, KPD 0005+5106,
cannot have evolved from a PG 1159 star but represents a distinct He-rich
evolutionary sequence that possibly originates from a binary white dwarf merger. |
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