Table 2: Convection zone mass (log q = log M(CVZ)/M ) and diffusion timescales (log tau[yrs]) in helium-rich white dwarfs. Convection parameters are ML2/1.25 in atmosphere and envelope. Source: Detlev Koester, University of Kiel, Germany (Jan 2013) ---------------------------------------------------------------------------------------------------------- Teff/K log g log q C O Na Mg Al Si Ca Fe ---------------------------------------------------------------------------------------------------------- 6000. 7.50 -3.262 9.2850 9.2195 8.5115 8.5717 8.5125 8.5893 8.5953 8.3522 7000. 7.50 -3.272 9.0671 8.6394 8.4084 8.4652 8.4189 8.4878 8.5008 8.0557 8000. 7.50 -3.332 8.7660 8.3394 8.2331 8.2848 8.2523 8.3111 8.1531 7.8434 9000. 7.50 -3.411 8.5373 8.1475 8.0797 8.1283 8.1040 8.1569 7.6978 7.7348 10000. 7.50 -3.594 8.3026 7.9345 7.8969 7.9430 7.7962 7.7235 7.5337 7.5802 11000. 7.50 -3.822 7.9417 7.7401 7.7201 7.7649 7.6158 7.5264 7.3696 7.4173 12000. 7.50 -4.061 7.6809 7.5667 7.5543 7.5984 7.5800 7.4678 7.2119 7.2576 13000. 7.50 -4.294 7.4649 7.4038 7.3920 7.4346 7.4165 7.3732 7.0592 7.1013 14000. 7.50 -4.535 7.2861 7.2423 7.2276 7.2686 7.2505 7.2927 6.9036 6.9421 15000. 7.50 -4.823 7.1050 7.0617 7.0430 7.0835 7.0653 7.1073 6.7227 6.7587 16000. 7.50 -5.183 6.9047 6.8303 6.8074 6.8468 6.8288 6.8699 6.4929 6.5272 17000. 7.50 -5.666 6.6386 6.5201 6.4953 6.5343 6.5169 6.5577 6.1838 6.2194 18000. 7.50 -6.398 6.1557 6.0458 6.0249 6.0645 6.0484 6.0623 5.7136 5.7555 19000. 7.50 -7.577 5.2861 5.2622 5.2570 5.3001 5.2054 5.1651 4.9357 4.9330 20000. 7.50 -9.159 4.1789 4.2154 4.1547 4.0968 3.9710 3.9176 3.9138 3.7365 21000. 7.50 -10.631 3.0771 3.1054 2.8972 2.8544 2.7810 2.7669 2.7987 2.6119 22000. 7.50 -10.827 2.9491 2.9810 2.7596 2.7163 2.6420 2.6302 2.6700 2.4761 23000. 7.50 -11.025 2.8213 2.8547 2.6211 2.5771 2.5019 2.4932 2.5396 2.3394 24000. 7.50 -11.238 2.6821 2.7143 2.4675 2.4226 2.3466 2.3418 2.3946 2.1881 25000. 7.50 -11.475 2.5262 2.5538 2.2918 2.2458 2.1708 2.1689 2.2279 2.0151 ---------------------------------------------------------------------------------------------------------- 6000. 8.00 -4.794 7.9387 7.2984 7.1394 7.2001 7.1455 7.2205 7.2281 6.6852 7000. 8.00 -4.740 7.8153 7.2428 7.1183 7.1757 7.1285 7.1973 7.2060 6.6484 8000. 8.00 -4.765 7.5905 7.0844 7.0073 7.0604 7.0234 7.0839 6.9602 6.5883 9000. 8.00 -4.796 7.1925 6.9366 6.8924 6.9419 6.9133 6.9670 6.5033 6.5209 10000. 8.00 -4.839 6.9975 6.8243 6.7972 6.8443 6.8207 6.8703 6.4248 6.4578 11000. 8.00 -4.962 6.8021 6.6936 6.6774 6.7231 6.5955 6.5160 6.3164 6.3565 12000. 8.00 -5.142 6.5999 6.5469 6.5369 6.5812 6.4480 6.3587 6.1854 6.2272 13000. 8.00 -5.340 6.4230 6.4003 6.3922 6.4353 6.3791 6.2911 6.0487 6.0900 14000. 8.00 -5.551 6.2597 6.2505 6.2414 6.2829 6.2642 6.1736 5.9062 5.9458 15000. 8.00 -5.782 6.1048 6.0994 6.0885 6.1296 6.1110 6.0472 5.7568 5.7956 16000. 8.00 -6.057 5.9267 5.9176 5.9038 5.9439 5.9257 5.8794 5.5775 5.6152 17000. 8.00 -6.411 5.7041 5.6873 5.6713 5.7108 5.6930 5.6483 5.3487 5.3866 18000. 8.00 -6.881 5.4070 5.3830 5.3668 5.4061 5.3889 5.3265 5.0463 5.0865 19000. 8.00 -7.573 4.9577 4.9337 4.9215 4.9615 4.9040 4.8442 4.6012 4.6268 20000. 8.00 -8.605 4.2478 4.2478 4.2474 4.2365 4.1213 4.0524 3.9174 3.8627 21000. 8.00 -9.924 3.3415 3.3827 3.2783 3.2217 3.0970 3.0580 3.0728 2.8607 22000. 8.00 -11.318 2.3020 2.3007 2.0930 2.0523 1.9810 1.9741 1.9926 1.8081 23000. 8.00 -11.488 2.1838 2.1874 1.9682 1.9266 1.8544 1.8496 1.8737 1.6836 24000. 8.00 -11.635 2.0831 2.0910 1.8618 1.8197 1.7469 1.7433 1.7720 1.5770 25000. 8.00 -11.791 1.9787 1.9887 1.7508 1.7080 1.6347 1.6327 1.6660 1.4671 ---------------------------------------------------------------------------------------------------------- 6000. 8.50 -6.326 6.5913 5.8784 5.7585 5.8194 5.7683 5.8425 5.7447 5.2525 7000. 8.50 -6.235 6.5241 5.8884 5.7850 5.8429 5.7961 5.8651 5.7385 5.3044 8000. 8.50 -6.228 6.0600 5.8057 5.7299 5.7839 5.7437 5.8061 5.5526 5.2854 9000. 8.50 -6.233 5.7548 5.6956 5.6480 5.6977 5.6648 5.7199 5.2617 5.2469 10000. 8.50 -6.219 5.6584 5.6212 5.5919 5.6386 5.6110 5.6611 5.2081 5.2260 11000. 8.50 -6.242 5.5750 5.5515 5.5333 5.5788 5.5546 5.4766 5.1623 5.1906 12000. 8.50 -6.313 5.4755 5.4646 5.4524 5.4962 5.3755 5.3040 5.0933 5.1272 13000. 8.50 -6.450 5.3506 5.3536 5.3449 5.3879 5.2474 5.1483 4.9923 5.0290 14000. 8.50 -6.621 5.2142 5.2264 5.2185 5.2606 5.1268 5.0456 4.8724 4.9100 15000. 8.50 -6.810 5.0790 5.0950 5.0868 5.1282 5.0085 4.9477 4.7451 4.7832 16000. 8.50 -7.016 4.9399 4.9552 4.9459 4.9867 4.8804 4.8339 4.6082 4.6465 17000. 8.50 -7.274 4.7697 4.7809 4.7700 4.8097 4.7161 4.6702 4.4376 4.4760 18000. 8.50 -7.620 4.5480 4.5537 4.5419 4.5811 4.4768 4.4330 4.2130 4.2525 19000. 8.50 -8.063 4.2638 4.2653 4.2543 4.2934 4.1705 4.1181 3.9271 3.9309 20000. 8.50 -8.669 3.8713 3.8731 3.8659 3.8804 3.7505 3.6857 3.5382 3.5145 21000. 8.50 -9.567 3.2571 3.2713 3.2729 3.1771 3.0703 2.9975 2.9366 2.8158 22000. 8.50 -10.602 2.5601 2.6023 2.4694 2.4041 2.2847 2.2451 2.2825 2.0437 23000. 8.50 -11.851 1.7076 1.7776 1.5107 1.4235 1.3407 1.2669 1.4110 1.1748 24000. 8.50 -12.181 1.4800 1.5558 1.2584 1.1747 1.0866 1.0185 1.1732 0.9499 25000. 8.50 -12.296 1.3996 1.4769 1.1741 1.0927 1.0041 0.9367 1.0933 0.8718