Table 2
Parameters of parabolic wind-driven shells with collimated Hubble law fit to arches and cusps in Fig. 7.
| Name of model | C (au−1) | τ (yr) | η | VZ(θ = 14°)(a) (km s−1) |
|---|---|---|---|---|
| WDS-A0 | 0.003 | 1600 | 0.6 | 16 |
| WDS-A2 | 0.01 | 850 | 0.5 | 9 |
| WDS-A3 | 0.02 | 500 | 0.5 | 7.5 |
| WDS-U5 | 0.04 | 220 | 0.5 (b) | 8.5 |
Notes. The collimated parabolic WDS model is described by Eq. (11): C is the inverse characteristic parabola size, τ the shell age along Z, η the VR reduction factor (η = 1 for a radial flow). (a) VZ(θ) = 1/(τC tan2 θ) (see Eq. (9)). (b) In the case of WDS-U5, we do not have any constraint on the aspect ratio, and set η at 0.5.
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