Table 6: $\rm {O^{++}/H^{+}}$ abundances derived from recombination lines.
    NGC 3242   NGC 7009
$\lambda$ (Å) Mult. $\rm O^{++}/H^{+} \times 10^{4}$   $\rm O^{++}/H^{+} \times 10^{3}$
4662 1 $5.91\pm0.84$   $1.42\pm0.07$
4676 1     $1.74 \pm 0.10 $
4317 2     $1.33\pm0.04$
4415 5 $5.01\pm1.25$   $2.51\pm0.05$
4132 19     $0.90\pm0.06$
4155 19     $1.99\pm0.20$
4089 48 $5.27\pm1.51$   $2.21\pm0.08$
4304 54     $2.23\pm0.15$
4276 67 $6.10\pm2.71$   $1.92\pm0.08$
4284 67     $1.84\pm0.06$
4609 92     $2.62\pm0.15$
Average   $5.57\pm0.20$   $1.88\pm0.14$


Source LaTeX | All tables | In the text