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Home All issues Volume 496 / No 1 (March II 2009) A&A, 496 1 (2009) 139-152 Full HTML
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Table 5:

Plasma diagnostic.
Parameter Lines PB8 NGC 2867-1 NGC 2867-2 PB6-1 PB6-2

$n_{\rm e}$ (cm-3)		 [N  I] ($\lambda$5198)/($\lambda$5200) - 1100 $\pm$ 450 850 $\pm$ 300 - -
  [O  II] ($\lambda$3726)/($\lambda$3729) 2650 $\pm$ 750 3050 $\pm$ 800 2300 $\pm$ 550 2050 $\pm$ 600 2200 $\pm$ 550
  [S  II] ($\lambda$6716)/($\lambda$6731) 2450 $\pm$ 1000 3550 $\pm$ 1200 2500 $\pm$ 800 1750 $\pm$ 900 2450 $\pm$ 850
  [Cl  III] ($\lambda$5518)/($\lambda$5538) 2400 $\pm$ 1800 4750 $\pm$ 1100 4750 $\pm$ 1200 - -
  [Ar  IV] ($\lambda$4711)/($\lambda$4740) <6850c 6800:c 3900 $\pm$ 1000 1650 $\pm$ 1000 1750 $\pm$ 950
  $n_{\rm e}$ (average) 2550 $\pm$ 550 4150 $\pm$ 500 2850 $\pm$ 400 1900 $\pm$ 450 2200 $\pm$ 400
$T_{\rm e}$ (K) [N  II] ($\lambda$6548+$\lambda$6583)/($\lambda$5755) 8900 $\pm$ 500a 11 750 $\pm$ 400 11 750 $\pm$ 400 12 350 $\pm$ 950 12 800 $\pm$ 550
  [S  II] ($\lambda$6716+$\lambda$6731)/($\lambda$4069+$\lambda$4076) - 8450:d 8250:d - -
  [O  II] ($\lambda$3726+$\lambda$3729)/($\lambda$7320+$\lambda$7330) 7050 $\pm$ 400b - - - -
  [O  III] ($\lambda$4959+$\lambda$5007)/($\lambda$4363) 6900 $\pm$ 150 11 850 $\pm$ 300 11 600 $\pm$ 250 15 750 $\pm$ 600 15 300 $\pm$ 500
  [Ar  III] ($\lambda$7136+$\lambda$7751)/($\lambda$5192) - 10 800 $\pm$ 550 11 350 $\pm$ 850 - -
  [Ar  IV] ($\lambda$4711+$\lambda$4740)/($\lambda$7170+$\lambda$7263) - 15 400:c >19 870: - -
  $T_{\rm e}$(N II+O III) 7000 $\pm$ 150 11 850 $\pm$ 250 11 600 $\pm$ 300 15 450 $\pm$ 500 15 050 $\pm$ 450
  He  I 6250 $\pm$ 150 10 900 $\pm$ 250 10 250 $\pm$ 250 13 250 $\pm$ 550 13 250 $\pm$ 450
  Balmer Decrement 5100 +1300-900 8950 +2900-1900 8950 +2900-1900 - -
a Corrected for recombination contribution to [N  II] $\lambda$5755 line (see text).
b Corrected for recombination contribution to [O  II] $\lambda$$\lambda$7320+30 lines (see text).
c Ar  IV $\lambda$4740.17 line affected by charge transfer in the CCD.
d S  II $\lambda$$\Lambda$4068.60, 4076.35 lines corrected for the contributions of C  III $\lambda$4067.94 line and O  II $\lambda$4075.86, respectively.

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