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Table 3:

Physical conditions and ionic abundances in PNe and H II regions.
  PN 4   PN 51,2   PN 6   PN 71   PN 10   PN 12   PN 14  
T(O III) (K) $17~870 \pm 980$ <23 000 $12~590 \pm 1500$ <13 400 $17~000 \pm 1000$ $13~000 \pm 1000$ $18~070 \pm 760$
T(N II) (K) $15~830 \pm 2300$ $16~100 \pm 1700$ $12~082 \pm 1800$       $17~550 \pm 1000$
N(S II) (cm-3) $2980 \pm 360$ $880 \pm 200$ $3910 \pm 480 $ $4000 \pm 2000$ 1000 (adopt) $2000 \pm 1000$ $5150 \pm 500$
N(Ar IV) (cm-3) $3240 \pm 1000$   1000:     $2700 \pm 1000$ $15~700 \pm 3500$
He+ 7.05 $\pm$ 0.40 E-2 5.2 $\pm$ 1.1 E-2 9.52 $\pm$ 0.50 E-2 1.07 $\pm$ 0.25 E-1 1.11 $\pm$ 0.08 E-1 9.34 $\pm$ 0.6 E-2 5.69 $\pm$ 0.33 E-2
He++(4686) 1.90 $\pm$ 0.18 E-2 4.20 $\pm$ 0.40 E-2 8.1 $\pm$ 4.0 E-4 0.00 E+00 0.00 E+00 2.00 $\pm$ 0.30 E-2 5.20 $\pm$ 0.10 E-2
O+(3727) 4.01 $\pm$ 0.60 E-6 7.7 $\pm$ 2.3 E-63 1.17 $\pm$ 0.26 E-5 5.50 $\pm$ 1.50 E-53 5.85 $\pm$ 1.17 E-63 3.16 $\pm$ 1.05 E-6 1.15 $\pm$ 0.40 E-53
O++(5007) 4.69 $\pm$ 0.53 E-5 4.6 $\pm$ 1.0 E-5 1.30 $\pm$ 0.20 E-4 1.02 $\pm$ 0.20 E-4 3.43 $\pm$ 0.52 E-5 1.56 $\pm$ 0.40 E-4 7.32 $\pm$ 0.60 E-5
N+(6583) 2.03 $\pm$ 0.20 E-6 2.20 $\pm$ 0.50 E-5 1.87 $\pm$ 0.22 E-6 2.9 $\pm$ 1.0 E-6 2.54 $\pm$ 0.27 E-7 6.5 $\pm$ 1.0 E-7 2.44 $\pm$ 0.30 E-5
Ne++(3869) 8.70 $\pm$ 1.00 E-6 - 2.18 $\pm$ 0.35 E-5 - 5.42 $\pm$ 0.74 E-6 2.36 $\pm$ 0.66 E-5 5.80 $\pm$ 0.50 E-65
Ne+4(3425) 2.92 $\pm$ 0.45 E-8 - 0.00 E+00 - 0.00 E+00 - -
S+(6717) 1.03 $\pm$ 0.10 E-7 5.5 $\pm$ 1.3 E-7 1.14 $\pm$ 0.17 E-7 7.8 $\pm$ 2.0 E-8 - 2.54 $\pm$ 0.60 E-8 7.93 $\pm$ 1.00 E-8
S++(6311) 8.43 $\pm$ 1.20 E-7 2.3 $\pm$ 1.0 E-6 8.45 $\pm$ 1.65 E-7 7.75 $\pm$ 2.00 E-7 - 1.54 $\pm$ 0.50 E-6 4.1 $\pm$ 2.0 E-7
Ar++(7135) 1.96 $\pm$ 0.17 E-7 4.10 $\pm$ 0.80 E-7 3.12 $\pm$ 0.32 E-7 4.9 $\pm$ 2.0 E-7 7.9 $\pm$ 1.4 E-8 2.82 $\pm$ 0.44 E-7 2.38 $\pm$ 0.30 E-7
Ar+3(4740) 1.37 $\pm$ 0.15 E-7 - 7.80 $\pm$ 1.00 E-8 - - 3.75 $\pm$ 0.80 E-7 2.08 $\pm$ 0.50 E-7
Ar+4(7006) 3.21 $\pm$ 0.40 E-8 - - - - - 1.34 $\pm$ 0.20 E-7
  PN 16 PN 18 PN 19 PN 21 H II 15 H II 9 H II 41
T(O III) (K) $14~390 \pm 720$ $18~000\pm 1000$ $20~000\pm 2000$ $13~668\pm1500$ $11~700\pm300$ 12 000 (adopt) 12 000 (adopt)
T(N II) (K)         $12~400 \pm 1500$    
N(S II) (cm-3) $1140 \pm 200$ $1420\pm400$ <100 $184\pm100$ $187 \pm 100$ <100  
N(Ar IV) (cm-3) $5100 \pm 2000$            
He+ $1.23 \pm 0.10$ E-1 <6.00 E-2 $1.30 \pm 0.50$ E-1 $1.00 \pm 0.10$ E-1 $8.23 \pm 0.05$ E-2 $4.5 \pm 1.4$ E-2 $1.50 \pm 0.50$ E-2
He++(4686) $2.50 \pm 0.25$ E-2 $6.5 \pm 1.6$ E-2 $1.50 \pm 0.30$ E-2 0.00 E+00 0.00 E+00 0.00 E+00 0.00 E+00
O+(3727) $1.73 \pm 0.50$ E-53 - $1.64 \pm 0.40$ E-53 $5.5 \pm 1.5$ E-6 $4.31 \pm 0.30$ E-5 - -
O++(5007) $1.39 \pm 0.20$ E-4 $1.88 \pm 0.30$ E-5 $1.82 \pm 0.40$ E-5 $8.3 \pm 2.0$ E-5 $8.36 \pm 0.40$ E-5 - -
N+(6583) 1.40 $\pm$ 0.20 E-6 2.13 $\pm$ 0.40 E-6 1.17 $\pm$ 0.50 E-6 1.07 $\pm$ 0.30 E-6 1.23 $\pm$ 0.20 E-6 - -
Ne++(3869) 2.56 $\pm$ 0.30 E-5 4.01 $\pm$ 0.70 E-6 - 1.51 $\pm$ 0.40 E-5 1.54 $\pm$ 0.20 E-5 - -
S+(6717) 4.42 $\pm$ 0.60 E-8 1.58 $\pm$ 0.15 E-7 6.7 $\pm$ 1.1 E-7 1.44 $\pm$ 0.40 E-7 2.72 $\pm$ 0.30 E-7 - -
S++(6311) 6.26 $\pm$ 1.00 E-7 - 8.8 $\pm$ 1.2 E-7 <3.00 E-6 2.47 $\pm$ 0.30 E-6 - -
Ar++(7135) 2.57 $\pm$ 0.30 E-7 - 2.26 $\pm$ 0.60 E-7 3.37 $\pm$ 0.50 E-7 6.23 $\pm$ 0.15 E-7 - -
Ar+3(4740) 3.99 $\pm$ 0.40 E-7 - - - - - -

1 Observed with Gemini; 2 T(N II) for ionic abundances; 3 [O II] 7320 for O+ abundance; 4 line intensity from Richer & McCall (2007).


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