Metal abundances in the hottest known DO white dwarf (KPD 0005+5106)

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Volume 524 (December 2010)

A&A, 524 (2010) A9

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Table 5

Element abundances in KPD 0005+5106 given in various units: number ratio relative to helium n_X/n_He, mass fractions β_X, and mass fractions in solar units β_X/β_⊙.

	log n_X/n_He	log β_X	β_X/β_⊙	log β_⊙	log β_X(RCrB)

H	<−1	<−1.6	<0.034	−0.13	≤ −5.2
He	0.00	−0.01	3.9	−0.60	−0.008
C	−2.5	−2.0	4.3	−2.63	−2.6
N	−3.2	−2.6	3.3	−3.16	−2.4
O	−3.0	−2.4	.69	−2.24	−2.7
Ne	−3.1	−2.4	3.0	−2.90	−2.5
Si	−3.8	−2.9	1.8	−3.18	−3.6
S	−4.0	−3.1	2.4	−3.51	−3.8
Ca	−4.6	−3.6	3.6	−4.19	−5.2
Fe	−4.0	−2.9	1.0	−2.89	−3.9

Notes. Solar abundances were adopted from Asplund et al. (2009). For comparison, the last column gives abundances in the majority RCrB stars. For error estimates see Sects. 4.2 and 5.

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