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Table 3
Source parameters for the DUSTY fit.
| Free Parameters | |||||||||
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| Source | Rint | Rint/ |
Luminosity | Tstar | Tdust | Rout/ |
τV | Grains | Mdust |
| [arcsec] | [104] | [103L⊙] | [K] | [K] | composition | [10-4 M⊙] | |||
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| NGC 6369 ........ | 2.8(±0.2) | 200(±20) | 3 | 70 000 | 140(±4) | 100 | 0.030(±0.001) | am-C | 4(±3) |
| NGC 6572 ........ | 3.7(±0.3) | 180(±20) | 8.3 | 80 000 | 160(±5) | 30 | 0.013(±0.001) | am-C | 0.7(±0.3) |
| Helix .......... | 140(±20) | 22 000(±4000) | 0.12 | 110 000 | 34(±2) | 20 | 0.0085(±0.0001) | am-C | 18(±7) |
| NGC 7009 ........ | 6.0(±0.4) | 300(±20) | 5 | 80 000 | 115(±3) | 100 | 0.0029(±0.0001) | Sil-DL | 2(±1) |
| NGC 6720 ........ | 4.8(±0.4) | 2400(±200) | 0.2 | 120 000 | 80(±3) | 200 | 0.035(±0.002) | am-C | 11(±5) |
| NGC 6826 ........ | 2.3(±0.2) | 100(±10) | 1.64 | 47 500 | 120(±5) | 30 | 0.030(±0.002) | Sil-DL | 1.5(±0.6) |
| NGC 7027 ........ | 2.6(±0.1) | 580(±20) | 10 | 190 000 | 190(±2) | 200 | 0.025(±0.004) | am-C | 4(±2) |
| NGC 6543 ........ | 4.8(±0.5) | 130(±10) | 5.2 | 56 000 | 120(±5) | 100 | 0.012(±0.001) | Sil-DL | 6(±3) |
| NGC 40 ........ | 2.3(±0.2) | 74(±6) | 1.7 | 50 000 | 160(±5) | 100 | 0.040(±0.002) | am-C | 2(±1) |
| CRL 618 ........ | 0.29(±0.03) | 2.0(±0.2) | 6 | 30 000 | 450(±4) | 10 000 | 50(±4) | am-C | 4 000(±2 000) |
| IC 418 ........ | 2.5(±0.3) | 20(±2) | 10 | 35 000 | 200(±8) | 200 | 0.040(±0.001) | am-C | 6(±3) |
| NGC 3242 ........ | 0.8(±0.2) | 80(±20) | 0.6 | 80 000 | 200(±20) | 100 | 0.007(±0.001) | Sil-Ow | 0.3(±0.2) |
Notes. Am-C indicates amorphous carbon (Hanner 1988), Sil-Ow indicate O-deficient silicates (Ossenkopf et al. 1992), and Sil-DL are astronomical silicates (Draine & Lee 1984).
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