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Table C.1.

Elemental mass ratios for the circumstellar debris accreted by WD 2138–332. The metal ratios for the increasing phase are the current photospheric values, as a consequence of the definition of that phase.

Material Ca/Mg Fe/Mg Fe/Ca
Increasing phase 0.13 0.68 5.29
Steady state phase 0.19 1.44 7.54

Chondrites 0.09 1.91 20.1
Crust 1.64 1.86 1.13
Mantle 0.12 0.28 2.42

Notes. Solar system abundances are from Lodders (2003), Rudnick & Gao (2003), Palme & O’Neill (2003). The mean photospheric abundances (as number rather than mass ratios) are: [Mg/He] = − 7.12, [Ca/He] = − 8.23, [Fe/He] = − 7.65.

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