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Table 7

Our adopted expansion distances, Dexp, and comparisons with other determinations.

Nebula Dexp DFrew DSH D MKH DPHM DKUP
[kpc] [kpc] [kpc] [kpc] [kpc] [kpc]

IC 418 1.15 ± 0.20 1.35 1.6 1.5 2.0 2.6
IC 2448 2.00 ± 0.30 2.22 2.6b 3.3
IC 4593 3.00 ± 1.20 2.67 3.2 3.0 3.6 3.3
NGC 3132 1.25 ± 0.30 1.23 1.3
NGC 3242 1.15 ± 0.15 0.85 1.1 1.7 1.1 1.7
NGC 3918 1.30 ± 0.25 1.55 1.6
NGC 5882 1.70 ± 0.30 1.67 2.4
NGC 6543 1.86 ± 0.15 1.15 1.6
NGC 6565 2.20 ± 0.70 2.20 4.7
NGC 6578 2.55 ± 0.45 2.46 3.7
NGC 6826 1.55 ± 0.20 1.40 1.6 1.8 3.2 2.5
NGC 6886 4.60 ± 1.00 4.29 4.4a
NGC 6891 1.45 ± 0.45 2.42 2.9 3.0
NGC 7009 1.50 ± 0.35 1.26 1.4 2.0
NGC 7662 1.90 ± 0.30 1.36 1.9

Notes. Optically-thick nebula in italics; DFrew: Frew et al. (2016); DSH: Stanghellini & Haywood (2010); DMKH: Méndez et al. (1992); DPHM: Pauldrach et al. (2004); DKUP: Kudritzki et al. (2006). The values for DMKH and DKUP are corrected corresponding to the new post-AGB models of Miller Bertolami & Althaus (2006); see text for details.

(a)

Distance from Stanghellini et al. (2008).

(b)

Value corrected by us because Stanghellini & Haywood (2010) give a distance of 4 kpc which, however, is based on a wrong angular radius: 5′′ (rim) instead of 10′′ (shell).

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