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Table 5:

Literature compilation of abundances estimates for PN G135.9+55.9.
Ref. Spectral $\ensuremath {T_{\rm eff}} $ $\langle\ensuremath{T_{\rm e}}\rangle$ He C N O Ne C/O N/O Ne/O
  domain $[10^3~{\rm K}]$ $[10^3~{\rm K}]$                
T01 O 150 -       $6.3\ensuremath{\phantom{0}} $(0.5)        
J02 O 100 17.6 10.82     6.93 7.47     3.47
R02 O 100 30 10.9 $\phantom{0}$     6.15 (0.35) 6.35     0.5 $\phantom{0}$(0.3)
PT05 O 130 30 10.91     $7.5\phantom{0}$(0.3) 6.65     0.14 (0.14)
S05 O+U - -   7.51 (0.15) 6.87 (0.19) 6.85 (0.25) 6.6 $\phantom{0}$ 4.7 $\phantom{0}$(1.1) 1.05 (0.15) 0.65 (0.35)
J06 O+U 130 30a 10.87 7.58 6.94 7.18 6.66 2.5 $\phantom{0}$ 0.58 0.30
this work O+U 138 21.1 10.88 7.90 7.47: 6.74 6.96 14 $\phantom{.0}$ 5.4: $\!\!\phantom{0}$ 1.7 $\phantom{0}$
$Z\ensuremath{_{{\rm GD}}} $       11.04 8.89 8.39 8.65 8.01 1.74 0.55 0.23
BoBn-1       11.05 8.85 8.00 7.83 7.72 10.5 1.48 0.78

Notes. The table only includes estimates that are based on observed emission lines. Columns 1-4 specify the source reference, the wavelength range (O - optical, and U - UV), the stellar effective temperature ( \ensuremath {T_{\rm eff}}) and the mean electron temperature ( $\langle\ensuremath{T_{\rm e}}\rangle$) used in the study. Columns 5-9 give element abundances using the same units as in Table 2. In Cols. 10-12 we also give abundance ratios relative to oxygen. Uncertainties are, were provided, given in parentheses. A colon indicates an uncertain value of our best-match model. The abundances of our best-match model are given in the row marked this work. In the last two rows we, for comparison, give the mean abundance distribution of the Galactic disk ( $Z\ensuremath{_{{\rm GD}}} $; Table 2) and the halo-PN BoBn-1 (the values of this object are taken from Howard et al. 1997). For further details see Sect. 5.
(a) Jacoby (priv. comm.).


Source LaTeX | All tables | In the text

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