Two white dwarfs with oxygen-rich atmospheres
Gaensicke, B. T., Koester, Detlev, Girven, Jonathan, Marsh, T. R. and Steeghs, D.. (2010) Two white dwarfs with oxygen-rich atmospheres. Science, Vol.327 (No.5962). pp. 188-190. ISSN 0036-8075
WRAP_Gansicke_090611-sdss1102.pdf - Accepted Version - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Official URL: http://dx.doi.org/10.1126/science.1180228
Stars with masses ranging from 7 to 10 times the mass of the Sun end their lives either as massive white dwarfs or weak type II supernovae, but there are only limited observational constraints on either evolutionary channel. Here we report the detection of two white dwarfs with large photospheric oxygen abundances, implying that they are bare oxygen-neon cores and that they may have descended from the most massive progenitors that avoid core collapse.
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