Metal Abundances in the Hottest Known DO White Dwarf (KPD 0005+5106)

Details Metal Abundances in the Hottest Known DO White Dwarf (KPD 0005+5106) Metal Abundances in the Hottest Known DO White Dwarf (KPD 0005+5106)

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1273..105w&link_type=abstract

17TH EUROPEAN WHITE DWARF WORKSHOP. AIP Conference Proceedings, Volume 1273, pp. 105-108 (2010).

Physics

1

White Dwarfs, Photosphere, Brightness, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Stellar Atmospheres, Radiative Transfer, Opacity And Line Formation, Luminosity And Mass Functions

Scientific paper

We performed a new analysis of UV and optical spectra of KPD 0005+5106. We find Teff = 200000+/-20000 K, log g = 6.7+/-0.3, M = 0.64 Msolar and log L/Lsolar = 3.7. The mass fractions of the metals are in the range 0.7-4.3 times solar. This abundance pattern is probably unaffected by gravitational settling and radiative levitation, hence, its origin lies in previous evolutionary stages. We speculate about a link of KPD 0005+5106 to the RCrB stars and its possible outcome of a double-degenerate merger event.

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