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Table 1
Measurements of characteristic structures in HST images of the four YPNe.
| Feature | H 1-8 | H 1-43 | ||||
|---|---|---|---|---|---|---|
| PA(a) | Size | Inclination(b) | PA(a) | Size | Inclination(b) | |
| (°) | (l″×w″) | (°) | (°) | (l″×w″) | (°) | |
| Lobe a − a′ | 11±3 | 2.47×1.01 | ... | 24±4 | 2.65×0.75 | ... |
| Lobe b − b′ | 4±4 | 3.53×1.03 | ... | 166±2 | 1.59×0.71 | ... |
| Lobe c − c′ | 137±3 | 4.44×3.04 | ... | ... | ... | ... |
| Feature | K 5-4 | M 3-14 | ||||
| PA(a) | Size | Inclination(b) | PA(a) | Size | Inclination(b) | |
| (°) | (l″×w″) | (°) | (°) | (l″×w″) | (°) | |
| Lobe a − a′ | 12±3 | 5.44×1.93 | ... | 9±4 | 8.71×3.64 | ... |
| Lobe b − b′ | 9±4 | 2.17×1.05 | ... | 157±2 | 9.36×3.85 | ... |
| Inner torus | 97±3 | 0.91×0.35 | 23±2 | ... | ... | ... |
| Outer torus | 102±3 | ... | ... | ... | ... | |
| Ionized torus | ... | ... | ... | 66±3 | 5.63×2.78 | 29±3 |
Notes. (a)Estimating from the angle between the major axis and the north. (b)Deriving from the major-to-minor axis ratio of the structure and assuming the inclination of sky plane is 0°.
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