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Home All issues Volume 543 (July 2012) A&A, 543 (2012) A152 Full HTML
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Table A.1

30 m CH3OD and CH2DOH line parameters.

Frequency Transition Eup/k S μ 2 dV f c Nu/gud Comment
(MHz) (Jka,kc) (K) (D2) (K km s-1) (cm-2)
CH3OD a
140 175.20 41,3 − 40,4 A − −  19.8 9.3 5.1 ± 0.7 0.42 1.55 ± 0.25 × 1012
143 741.65 51,4 − 50,5 A − −  27.5 11.2 6.6 ± 0.7 0.43 1.57 ± 0.20 × 1012
148 359.77 60,6 − 51,5 A + +  31.7 5.7 3.3 ± 0.3 0.45 1.45 ± 0.16 × 1012
153 324.00 71,6 − 70,7 A − −  47.4 14.7 7.6 ± 0.6 0.47 1.21 ± 0.11 × 1012
155 533.08 11,0 − 00,0 E 7.8 1.0 0.9 ± 0.4 0.47 1.93 ± 1.09 × 1012
CH2DOHb
99 672.23 61,5 − 60,6e0 50.4 12.3e 0.3 ± 0.1 0.27 1.51 ± 0.61 × 1011
136 151.26 31,2 − 21,1e0 17.1 2.1e 0.6 ± 0.1 0.41 8.58 ± 1.72 × 1011 g
226 818.36 51,4 − 41,3e0 36.7 3.8e 1.6 ± 0.2 0.66 4.72 ± 0.71 × 1011 g
99 672.23 61,5 − 60,6e0 50.4 5.8f 0.3 ± 0.1 0.27 3.23 ± 1.29 × 1011
136 151.26 31,2 − 21,1e0 17.1 3.1f 0.6 ± 0.1 0.41 5.91 ± 1.18 × 1011 g
226 818.36 51,4 − 41,3e0 36.7 5.5f 1.6 ± 0.2 0.66 3.27 ± 0.49 × 1011 g

Notes. 

(a)

Mauersberger et al. (1988); centered at KL-WM (, , J2000).

(b)

Jacq et al. (1993); centered at IRc2 (, , J2000).

(c)

The beam filling factor is calculated by assuming a source size θs of 15′′. θb is the 30 m beam size.

(d)

The beam filling factor is taken into account in the calculation of Nu, and the rms noise and calibration uncertainties are included (assuming 20%).

(e)

The Old Sμ2 taken from Jacq et al. (1993).

(f)

The New Sμ2 provided by Parise (priv. comm.).

(g)

The data obtained at the offset position (0′′, − 6′′) of IRc2.

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