Table 1
Summary of physical data for observed PNe and their central stars.
| Name | Morphology (1) | Angular | D | R | Age | Ionized PN | CSPN | T⋆ | MassCS | Refs. |
|---|---|---|---|---|---|---|---|---|---|---|
| (F08/SMV11) | radius (2) (′′) | (kpc) | (pc) | (103 yr) | Mass (M⊙) | sp type | (kK) | (M⊙) | ||
| BD+303639 | Er/Ecsarh | 4 | 1.52 | 0.02 | 0.8 | 0.01 | [WC9] | 32 | 0.58 | a, b, c |
| NGC 7027 | Bs/Mctspih | 14 | 0.92 | 0.03 | 0.7 | 0.05 | ... | 175 | 0.67 | c, d |
| NGC 6445 | Bs/Mpi | 17 | 1.38 | 0.14 | 5.3 | 0.18 | ... | 170 | 0.64 | e, f, c |
| NGC 7008 | Efp/Bs | 43 | 0.97 | 0.15 | 5.7 | 0.08 | O(H) | 97 | 0.55 | a, g, c |
| NGC 6720 (M 57) | Ebmr(h)/Ecsh | 35 | 0.70 | 0.13 | 7.0 | 0.09 | hgO(H) | 112 | 0.66 | a, h |
| NGC 6853 (M 27) | Ebm(h)/Bbpih | 49 | 0.38 | 0.37 | 10.0 | 0.41 | DAO | 114 | 0.63 | a, i, j |
| NGC 6772 | Ep/E | 32 | 1.27 | 0.22 | 10.9 | 0.17 | ... | 135 | 0.64 | e, k, c |
| NGC 7293 | Bams(h)/Ltspir | 402 | 0.20 | 0.46 | 16.3 | 0.35 | DAO | 107 | 0.63 | i, k, a |
| NGC 6781 | Bam(h:)/Bth | 53 | 0.95 | 0.32 | 20.0 | 0.44 | DAO | 112 | 0.57 | a, l, c |
Notes. (1) Morphology descriptions as defined in Frew (2008) (F08); a: asymmetry present, B: bipolar, b: bipolar core, E: elliptical, f: filled amorphous center, (h): distinct outer halo, m: multiple shells, p: point symmetry present, r: dominant ring structure, s:internal structure. Morphology description modified slightly from Sahai et al. (2011) (SMV11); a: ansae, B: bipolar, c: closed outer lobes, E: elongated, h: halo, i: inner bubble, L: collimated lobe pair, M: multipolar, p: point symmetry, r: radial rays, s: CSPN apparent, t: bright central toroidal structure. (2) Angular radii estimated using DSS data.
References. For PN data: a: Frew et al. (2016), b: Li et al. (2002), c: Kastner et al. (2012), d: Latter et al. (2000), e: Stanghellini & Shaw (2008), f: Phillips (1984), g: Górny et al. (1997), h: O’Dell et al. (2007), i: Gaia Collaboration (2018), j: O’Dell et al. (2002), k: Ali et al. (2012), l: Ueta et al. (2014).
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