Deuteration and evolution in the massive star formation process - The role of surface chemistry

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Volume 575 (March 2015)

A&A, 575 (2015) A87

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Table 8

Rotation temperatures and total column densities for CH₃OH, ¹³CH₃OH, and CH₂DOH derived from rotation diagrams, unless when specified differently.

Source	CH₃OH		¹³CH₃OH		CH₂DOH
	T _rot	N	T _rot	N	T _rot	N	D_frac(CH₃OH)
	K	(× 10¹⁴) cm^-2	K	(× 10¹³) cm^-2	K	(× 10¹⁴) cm^-2


HMSC
I00117–MM2	19.0	1.80		≤ 0.3		≤ 0.013	≤ 0.007
AFGL5142–EC	41.5	61.5	14.1	5.27	–^a	0.11^a	0.002(0.001)
05358–mm3	26.1	24.9	5.1	1.53		0.08	0.003(0.001)
G034–G2(MM2)	6.0	1.75	–^a	0.09^a		0.03	0.015(0.07)
G034–F2(MM7)	5.7	0.95		≤ 0.15		≤ 0.007	≤ 0.007
G034–F1(MM8)	17.5	2.24		≤ 0.3		≤ 0.01	≤ 0.006
G028–C1(MM9)	14.2	2.69	6.8	0.71		≤ 0.01	≤ 0.004
I20293–WC	24.4	3.44		≤ 0.5		≤ 0.02	≤ 0.005
I22134–G	18.1	2.87		≤ 0.3		≤ 0.01	≤ 0.004
I22134–B	7.8	0.35		≤ 0.2		≤ 0.007	≤ 0.02


HMPO
I00117–MM1	27.7	1.22		≤ 0.6		≤ 0.02	≤ 0.02
AFGL5142–MM	112.6	262.7	7.9	5.81	10.4	19.0^b; 2.1^c	0.07(0.03)^b; 0.008(0.004)^c
05358–mm1	84.0	125.1	–^a	6.1^a		≤ 0.13	≤ 0.001
18089–1732	158.6	318.1	153.0	64.2	56	14.0^b; 4.0^c	0.04(0.02)^b; 0.01(0.01)^c
18517+0437	137.6	209.2	44.5	25.6		≤ 0.2	≤ 0.001
G75–core	108. 5	150.6	–^a	4.2^a		0.55	0.005(0.003)
I20293–MM1	35.1	27.5	–^a	0.9^a		≤ 0.04	≤ 0.001
I21307	29.4	6.54		≤ 0.5		≤ 0.03	≤ 0.004
I23385	25.3	18.0	–^a	0.3^a		≤ 0.02	≤ 0.01


UC Hii
G5.89–0.39	64.1	128.1	37.9	14.0		≤ 0.14	≤ 0.001
I19035–VLA1	30.7	16.4	28.6	4.80		≤ 0.03	≤ 0.002
19410+2336	31.1	20.2	20.8	5.79		≤ 0.03	≤ 0.001
ON1	31.3	32.4	25.5	8.98		≤ 0.02	≤ 0.0007
I22134–VLA1	19.4	1.64		≤ 0.3		≤ 0.02	≤ 0.009
23033+5951	24.2	12.0	37.4	8.33		≤ 0.02	≤ 0.002
NGC7538–IRS9	28.7	17.6	–^a	0.5^a		≤ 0.02	≤ 0.001

Notes. For CH₂DOH, in the sources where only one line has been detected, we have computed the total column density from Eq. (A4) of Caselli et al. (2002), assuming the temperatures obtained from CH₃OH.

^(a)

Only lines with very close upper energies are detected, and the rotation diagram provides a meaningless negative T_rot. Therefore, the column density has been derived from the transition (2_0,2−1_0,1)++ assuming LTE conditions and T_rot from methanol;

^(b)

derived from rotation diagrams;

^(c)

derived from the transition (5_2,3−4_1,4)e1 assuming LTE conditions and T_rot from methanol.

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