Free Access

Table 3

Observed 12C/13C integrated intensity ratios.

  I(12CH3OH) I(13CH3OH) I(12C18O) I(13C18O)
Source (K km s-1) (mK km s-1) R   (CH3OH) (K km s-1) (mK km s-1) R   (C18O) R   (CO2,ice)

W51 e1/e2 73.7  ±  0.2 4120  ±  30 18  ±  3 18.8  ±  0.10 a 413  ±  14 a 46  ±  2 a -
NGC 2264 IRS1 40.9  ±  0.2 722.9  ±  60 57  ±  9 5.11  ±  0.02 a 90.5  ±  5.4 a 56  ±  3 a 131  ±  21 b
DR21 (OH) 29.2  ±  0.1 534  ±  15 55  ±  8 7.09  ±  0.02 a 123  ±  7 a 58  ±  3 a -
NGC 7538 IRS9 17.5  ±  0.1 250  ±  38 70  ±  15 4.18  ±  0.05 61.9  ±  9.6 68  ±  14 80  ±  11 c
S140 IRS1 5.83  ±  0.09 72  ±  15 81  ±  20 7.67  ±  0.05 92.6  ±  8.2 83  ±  14 111  ±  11 b

Notes. Integrated intensities are calculated from the main-beam corrected spectra and have 1σ errors attached, while the ratio errors include an additional 10% calibration error.

References. 

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.