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Table 1.
Estimated radial velocity, expansion velocity, [N II]/Hα ratio, [S II] I(6731)/I(6716) ratio, and Ne for each pointing.
pointing | vr ± σ (km s−1) | vexp(1) (km s−1) | [N II]/Hα | I(6731)/I(6716) | Ne(2) (cm−3) |
---|---|---|---|---|---|
a | −13.8 ± 1.2 | 75 | 3.33 | 0.21 ± 0.04 | < 100 |
b | −8.8 ± 2.8 | 100 | 4.77 | 0.64 ± 0.05 | < 100 |
c | 7.5 ± 1.7 | 85 | 4.39 | 0.91 ± 0.04 | 497 |
d | 5.4 ± 2.1 | 98 | 0.91 | 0.75 ± 0.08 | < 100 |
e | 38.4 ± 0.3 | 63 | 3.35 | 0.80 ± 0.03 | 230 |
f (3) | 23.3 ± 2.2 | 93 | 1.83 | 0.90 ± 0.01 | 471 |
g | 30.5 ± 0.9 | 93 | 4.18 | 0.59 ± 0.03 | < 100 |
h | 26.5 ± 1.1 | 98 | 3.66 | 0.72 ± 0.02 | < 100 |
i | 59.1 ± 0.4 | 92 | 1.09 | 0.83 ± 0.13 | 297 |
j | 30.4 ± 2.0 | 106 | 3.78 | 0.77 ± 0.02 | 165 |
k | 62.1 ± 1.3 | 92 | 5.44 | 0.78 ± 0.04 | 185 |
Notes. (1) Refers to the polar expansion velocity. (2) Assuming Te = 11 500 K. (3) Centred on the CSPN and so also a reasonable proxy for the systemic PN velocity.
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