The relation between interstellar OH and other simple molecules

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Volume 499 / No 3 (June I 2009)

A&A, 499 3 (2009) 783-787

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Table 4:

Calculated total column densities of the observed interstellar features.
HD/Obs	N(OH)	N(CH)	N(CH⁺)	N(CN)	N(H₂)
	[10¹² cm^-2]	[10¹² cm^-2]	[10¹² cm^-2]	[10¹² cm^-2]	[10²⁰ cm^-2]
23180 B	39.00 ^a	22.24 $\pm$ 2.91	7.89 $\pm$ 0.63	1.82 $\pm$ 0.12	4.00^g
24398 B	40.50 $\pm$ 4.00^b	22.30 $\pm$ 2.61	4.28 $\pm$ 1.84	3.12 $\pm$ 0.18	4.70^g
27778 B	102.00 $\pm$ 4.00^b	39.93 $\pm$ 4.10	10.55 $\pm$ 0.63	26.76 $\pm$ 4.12^f	6.17^h
34078 G/B	35.00 $\pm$ 4.00^c	79.27 $\pm$ 4.82	57.28 $\pm$ 2.25 $^{d^{\prime}}$	2.16 $\pm$ 0.05	6.40^c
147889 u	252.36 $\pm$ 30.74	100.33 $\pm$ 5.87	33.90 $\pm$ 1.96^d	25.06 $\pm$ 2.09^e
148688 u	23.11 $\pm$ 9.88	18.73 $\pm$ 1.18	28.29 $\pm$ 3.59^d	0.39 $\pm$ 0.04
149757 u	40.98 $\pm$ 6.00	25.44 $\pm$ 0.82	29.32 $\pm$ 1.96^d	2.68 $\pm$ 0.05	4.40^g
151932 u	79.15 $\pm$ 9.88	26.76 $\pm$ 3.42	15.13 $\pm$ 3.38	2.43 $\pm$ 0.07
152270 u	56.54 $\pm$ 12.81	17.79 $\pm$ 2.61	25.10 $\pm$ 1.14	1.59 $\pm$ 0.10
154368 u	169.84 $\pm$ 15.73	61.75 $\pm$ 4.10	21.46 $\pm$ 1.67	26.44 $\pm$ 2.07^e	14.45^h
154811 u	51.90 $\pm$ 9.15	22.85 $\pm$ 2.79	39.43 $\pm$ 2.59^d	0.17 $\pm$ 0.04
163800 h/u	78.43 $\pm$ 14.27	34.36 $\pm$ 2.16	16.02 $\pm$ 0.86	2.96 $\pm$ 0.08
164794 u	32.26 $\pm$ 11.89	11.86 $\pm$ 2.47	10.32 $\pm$ 0.72	0.27 $\pm$ 0.06
169454 u	98.76 $\pm$ 13.17	42.90 $\pm$ 2.79	19.50 $\pm$ 1.42	40.22 $\pm$ 2.38^e

We designate data from the literature as follows: ^a - Roueff (1996); ^b - Felenbok & Roueff (1996); ^c - Boissé et al. (2005). To avoid saturation effects in the case of CH⁺ and CN molecules we used the unsaturated: ^d - CH⁺ A-X (1, 0) line at 3957 Å; $d^{\prime}$ - CH⁺ A-X (2, 0) line at 3745 Å; ^e - CN B-X (1, 0) band at 3579 Å; ^f - CN A-X (1, 0) band at 9186 Å. Data on H₂ taken from ^g - Savage et al. (1977); ^h - Rachford et al. (2002); ^c - Boissé et al. (2005).

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