Abundances in the planetary nebula NGC 6210 | Astronomy & Astrophysics (A&A)

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Table 1:

IRS spectrum of NGC 6210.
Identification	$\lambda$ ( $\mu$ m)	Intensity $^{\dagger}$	I/H $\beta$
H I(9-6)+[K IV]	5.94	79.6 $\pm$ 28	0.72
H I (12-7)	6.77	17 $\pm$ 0.4
	6.98	83 $\pm$ 4.5	0.76
	7.31	53 $\pm$ 2.9	0.47
H I(6-5)	7.47	301 $\pm$ 17
	8.99	1610 $\pm$ 52	14.7
	10.506	16700 $\pm$ 250	152
H I(9-7)	11.305	48.2 $\pm$ 1.2
	11.757	90.1 $\pm$ 3.7	0.82
H I (7-6+11-8)	12.368	114 $\pm$ 4
	12.808	498 $\pm$ 40	4.55
H 1 (13-9)	14.180	7.1 $\pm$ 0.9
	14.359	4.74 $\pm$ 0.6	0.043
	15.548	18500 $\pm$ 1500	169
H I (10-8)	16.210	12.4 $\pm$ 2.4
	17.885	22.7 $\pm$ 2.2	0.21
	18.707	2820 $\pm$ 120	25.7
	20.310	48.7: $\pm$ 6.6	0.45:
	21.814	79.5 $\pm$ 10.5	0.72
	22.924	31.9 $\pm$ 3.9	0.29
	25.884	777 $\pm$ 21	7.10
	33.014	34.5: $\pm$ 2.7	0.31
	33.470	890 $\pm$ 10.7	8.14
	34.809	33.6 $\pm$ 6.3	0.30
	36.001	1590 $\pm$ 24	14.5

$^{\dagger}$ Intensities measured in units of 10^-14 erg cm^-2 s^-1. The intensities below 19 $\mu$ m have been increased by a factor of 1.77 to bring them on the same scale as the LH intensities measured through a larger diaphragm. The intensities below 10 $\mu$ m are measured with the low resolution instrument and are brought to the same scale by matching the [S IV] and [Ne II] lines.
: Indicates an uncertain value.
The measured line intensity is given in Col. 3. The last column gives the ratio of the line intensity to H $\beta$ (=100).

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