Table 3: Elemental abundances of NGC 6309. ICFs were obtained following Kingsburgh & Barlow (1994). Comparison with mean values of All-type PNe, type I PNe and other objects are shown. Except for He, all the abundances relative to H are logarithmic values with H = +12.
Ion R1 R2 R3 R4 G04a PNeb TI PNec H IId Sune
He/H $0.11\pm0.01$ $0.11\pm0.01$ $0.12\pm0.01$ $0.12\pm0.01$ $0.10\pm0.01$ $0.12\pm0.02$ $0.13\pm0.04$ $0.10\pm0.01$ $0.09\pm0.01$
O /H $8.74\pm0.02$ $8.72\pm0.02$ $8.72\pm0.01$ $8.74\pm0.01$ $8.64\pm0.02$ $8.68\pm0.15$ $8.65\pm0.15$ $8.70\pm0.04$ $8.66\pm0.05$
N /H $7.93\pm0.02$ $7.92\pm0.02$ $8.04\pm0.01$ $7.89\pm0.02$ $8.20\pm0.12$ $8.35\pm0.25$ $8.72\pm0.15$ $7.57\pm0.04$ $7.78\pm0.06$
Ne/H $8.26\pm0.02$ $8.25\pm0.02$ - - $7.82\pm1.00$ $8.09\pm0.15$ $8.09\pm0.15$ $7.90\pm0.10$ $7.84\pm0.06$
Ar/H $6.40\pm0.10$ $6.42\pm0.10$ $6.54\pm0.01$ $6.51\pm0.01$ - $6.39\pm0.30$ $6.42\pm0.30$ $6.42\pm0.04$ $6.18\pm0.08$
S /H $6.74\pm0.01$ $6.73\pm0.01$ $6.84\pm0.01$ $6.87\pm0.01$ $6.49\pm0.05$ $6.92\pm0.30$ $6.91\pm0.30$ $7.06\pm0.06$ $7.14\pm0.05$
a Taken from Górny et al. (2004).
b Average for PNe (Kingsburgh & Barlow 1994).
c Average for type I PNe (Kingsburgh & Barlow 1994).
d Average for H II regions (Shaver et al. 1983).
e The Sun (Grevesse et al. 2007).

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