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Table 3

Quantitative properties of the [O iii]/Hα profiles of Figs. 6–8.

PN Region [O iii]/Hα FWHMa
enhancement
(%) (′′) (cm)
Type A PNe
IC 4593 Southern bow-shock ×2.0 2% 027 1.5 × 1016
NGC 6210 Northern bow-shock ×1.7 3% 070 2.1 × 1016
NGC 7009 Eastern bow-shock ×1.3 3% 063 1.1 × 1016
Type B PNe
NGC 3242 Inner shell ×1.3 10% 093 3.6 × 1016
Outer shell ×2.7 3% 057 2.2 × 1016
North-west blister ×2.0 1.5% 038 1.5 × 1016
NGC 6826 Outer shell ×3.1 1% 014 4.0 × 1015
Type C PNe
IC 418 Main shell ÷6.0 40% 17 1.5 × 1016
NGC 6720 Main shell ÷4.9 24% 75 1.0 × 1017
NGC 6886 Main shell ÷1.7 18% 032 1.5 × 1016

Notes.

(a)

The shape of the profile of these regions is not symmetric and the measurement of their widths corresponds to the innermost half of the profile.

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