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Table 3

Relevant parameters of the four α = 2 models with central-star masses 0.625 M, as depicted in Fig. 24.

Metall. Z t L T eff M(5007) Rrim/Rout out V post  ⟨ Te ⟩  Mion(Rrim)a Mion(Rout)a
[yr] [L] [K] [mag] [1017 cm] [km s-1] [km s-1] [km s-1] [K] [M] [M]
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

3ZGD 2392 6643 117 643 –4.66 1.5/2.1 33 24.1 20.3/26.3b  8070 0.043 (0.017) 0.174 (0.109)
Z GD 1694 7507  73 338 –4.25 0.8/1.5 35 25.7 18.6/25.1  9553 0.012 0.131
ZGD/3 1460 7667  60 917 –3.80 0.6/1.3 37 27.6 18.5/26.7 12 080 0.007 (0.011) 0.119 (0.153)
ZGD/10 1324 7736  54 296 –3.08 0.4/1.2 40 29.6 18.0/27.9 15 198 0.012 (0.013) 0.115 (0.169)

Notes. Columns 2−4 describe the central star (post-AGB age, luminosity, and effective temperature), and Cols. 5−12 the nebular properties (maximum [O iii]-brightness, rim/shock positions, shock propagation, post-shock velocity, velocities at half-width-half-maximum (HWHM) and half-width-10%-maximum (HW10%M) of the spatially integrated [O iii] 5007 Å line profile, the mean O2+ electron temperature, the mass of the rim, and the total ionised nebular mass). The initial parameters of the circumstellar envelopes are  M yr-1 and vagb = 15 km s-1 in all cases.

(a)

Mass values in parentheses refer to the age of the ZGD model, t = 1694 yr;

(b)

VHW10%M > Vpost because at this phase of advanced evolution the rim matter expands faster than the shell (cf. top left panel of Fig. 24).

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