Table A.5
Average column densities and abundances for molecules without hyperfine multiplet lines in a square region from [20′′, 20′′] to [−20′′, −20′′] of four IRDCs observed by IRAM 30 m.
| Species | G28.34 S | IRDC 18530 | IRDC 18306 | IRDC 18308 |
| (12 K) | (9 K) | (8 K) | (12 K) | |
|
|
||||
| I. Molecular column density [x ± y(z) = (x ± y) × 10z cm-2] | ||||
|
|
||||
| OCS | 2.31 ± 0.34(13) | × | ≤ 5.62(12) | ≤ 5.32(12) |
| c-C3H2 | 1.10 ± 0.03(13) | × | 3.61 ± 0.17(12) | 2.48 ± 0.32(12) |
| c−CH3C2H(1) | 5.01 ± 0.69(13) | × | 1.53 ± 0.29(14) † | 3.52 ± 0.92(13) |
| c−CH3C2H(2) | 2.23 ± 0.33(13) | × | 6.48 ± 2.08(12) | ≤ 7.09(12) |
| NH2D | 5.53 ± 0.61(12) | 6.60 ± 0.80(12) † | 5.94 ± 0.69(12) | 2.79 ± 0.52(12) |
| H13CO+ | 1.45 ± 0.03(12) | 5.13 ± 0.14(11) | 4.39 ± 0.19(11) | 6.51 ± 0.23(11) |
| SiO | 1.11 ± 0.07(12) | ≤ 5.39(10) | ≤ 4.34(11) | ≤ 6.00(10) |
| HN13C | 2.55 ± 0.05(12) | 9.13 ± 0.35(11) | 7.45 ± 0.33(11) | 9.69 ± 0.45(11) |
| HNCO | 1.75 ± 0.05(13) | 6.50 ± 0.44(12) | 7.24 ± 0.56(12) | 3.60 ± 0.46(12) |
| HCO+∗ | 4.42 ± 0.11(13) | 3.82 ± 0.04(13) | 2.32 ± 0.18(13) | 4.05 ± 0.06(13) |
| HNC∗ | 6.52 ± 0.09(13) | 4.02 ± 0.03(13) | 2.49 ± 0.09(13) | 3.97 ± 0.05(13) |
| HC3N | 3.77 ± 0.15(12) | 1.58 ± 0.14(12) | 2.42 ± 0.20(12) | 7.42 ± 1.43(11) |
| 13CS | 9.95 ± 1.08(11) | ≤ 1.25(11) | 4.66 ± 0.82(11) | ≤ 1.37(11) |
| H2CO | 7.36 ± 0.64(13) † | ≤ 9.15(11) | ≤ 9.67(11) | ≤ 7.81(11) |
| C18O | 4.48 ± 0.07(15) | 2.50 ± 0.05(15) | 2.78 ± 0.07(15) | 1.73 ± 0.06(15) |
| 13CO∗ | 3.41 ± 0.10(16) | 3.39 ± 0.10(16) | 2.01 ± 0.09(16) | 4.61 ± 0.32(16) |
| C17O | 1.33 ± 0.07(15) | × | 9.55 ± 0.50(14) | 3.97 ± 0.54(14) |
|
|
||||
| II. Molecular abundances with respect to H2 [x ± y(z) = (x ± y) × 10z] | ||||
|
|
||||
| OCS | 1.75 ± 0.55(−10) | × | ≤ 2.94(−11) | ≤ 8.70(−11) |
| c-C3H2 | 8.31 ± 1.53(−11) | × | 1.89 ± 0.75(−11) | 4.05 ± 1.64(−11) |
| c−CH3C2H(1) | 3.79 ± 1.17(−10) | × | 8.03 ± 4.70(−10) † | 5.75 ± 3.27(−10) |
| c−CH3C2H(2) | 1.69 ± 0.54(−10) | × | 3.39 ± 2.59(−11) | ≤ 1.16(−10) |
| NH2D | 4.18 ± 1.16(−11) | 3.85 ± 1.09(−11) † | 3.11 ± 1.52(−11) | 4.56 ± 2.18(−11) |
| H13CO+ | 1.09 ± 0.19(−11) | 3.00 ± 0.52(−12) | 2.30 ± 0.90(−12) | 1.06 ± 0.31(−11) |
| SiO | 8.35 ± 1.82(−12) | ≤ 3.15(−13) | ≤ 2.27(−12) | ≤ 9.81(−13) |
| HN13C | 1.93 ± 0.33(−11) | 5.33 ± 1.00(−12) | 3.90 ± 1.54(−12) | 1.58 ± 0.48(−11) |
| HNCO | 1.32 ± 0.24(−10) | 3.79 ± 0.84(−11) | 3.79 ± 1.66(−11) | 5.89 ± 2.38(−11) |
| HCO+∗ | 3.34 ± 0.59(−10) | 2.23 ± 0.35(−10) | 1.21 ± 0.54(−10) | 6.63 ± 1.74(−10) |
| HNC∗ | 4.58 ± 0.76(−10) | 2.18 ± 0.33(−10) | 1.56 ± 0.60(−10) | 6.49 ± 1.69(−10) |
| HC3N | 2.85 ± 0.56(−11) | 9.25 ± 2.26(−12) | 1.26 ± 0.56(−11) | 1.21 ± 0.59(−11) |
| 13CS | 7.52 ± 2.06(−12) | ≤ 7.30(−13) | 2.44 ± 1.39(−12) | ≤ 2.25(−12) |
| H2CO | 5.56 ± 1.39(−10) † | ≤ 5.35(−12) | ≤ 5.06(−12) | ≤ 1.28(−11) |
| C18O | 3.38 ± 0.57(−8) | 1.46 ± 0.24(−8) | 1.46 ± 0.54(−8) | 2.83 ± 0.80(−8) |
| 13CO∗ | 2.58 ± 0.47(−7) | 1.98 ± 0.35(−7) | 2.41 ± 1.04(−7) | 3.28 ± 0.98(−7) |
| C17O | 1.01 ± 0.21(−8) | × | 5.00 ± 2.02(−9) | 6.50 ± 2.69(−9) |
Notes. 1. “×” denotes a species that we did not observe in a certain source. 2. For species that are not detected, an upper limit derived from 3σ rms is given. 3. Column density and abundances are obtained at mean Tex of CO isotopologues with LTE assumption. 4. Species with “*” and values in bold face are likely obtained from optically thick lines and for which we did the optical depth correction. 5. Uncertainties on the measured values are determined from Tex,CO, partition function Q(Tex,CO), and Gaussian fit to 
. 6. “†” denotes a species whose distribution is less extended than the 30 m primary beam (filling factor f< 0.5).
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.