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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