Table 5
Number of detected lines (S∕N ≥ 3), range of upper level energies of the detected transitions, temperatures (K), and beam-averaged column densities (cm−2) derived from the rotational diagram analysis.
| Species | Nlines | Eu | Trot | Ntot |
|---|---|---|---|---|
| (K) | (K) | (cm−2) | ||
| L1489-IRS | ||||
| SO | 2 | 35−44 | 6 (2) | 2(3) × 1014 |
| p-H2CO | 3 | 21−68 | 23 (3) | 43(13) × 1011 |
| c-C3H2 | 3 | 19−39 | 19 (5) | 5(2) × 1011 |
| B5-IRS1 | ||||
| SO | 2 | 35−44 | 8 (2) | 1(2) × 1014 |
| p-H2CO | 3 | 21−68 | 24 (3) | 6(2) × 1012 |
| c-C3H2 | 4 | 19−61 | 18 (3) | 10(3) × 1011 |
| L1455-IRS1 | ||||
| SO | 2 | 35−44 | 10 (4) | 4(5) × 1013 |
| OCS | 2 | 100−110 | 59(102) | 2(5) × 1013 |
| p-H2CO | 3 | 21−68 | 68(25) | 20(6) × 1012 |
| HDCS | 2 | 42−51 | 13 (9) | 2(5) × 1012 |
| c-C3H2 | 4 | 19−61 | 16 (3) | 13(5) × 1011 |
| L1551-IRS5 | ||||
| SO | 2 | 35−44 | 40 (50) | 2(3) × 1013 |
| SO2 | 2 | 19−94 | 44 (8) | 8(2) × 1012 |
| OCS(a) | 2 | 100−110 | 64 (121) | 2(5) × 1015 |
| p-H2CO | 3 | 21−68 | 41 (9) | 4(13) × 1013 |
| o-D2CO | 2 | 28−50 | 18 (4) | 3(2) × 1012 |
| p-D2CO | 2 | 32−50 | 28 (14) | 9(7) × 1012 |
| c-C3H2 | 4 | 19−61 | 24 (4) | 11(3) × 1012 |
| H2CCO | 2 | 64−76 | 21 (13) | 2(8) × 1013 |
| CH3OH(b) | 9 | 45−374 | 148 (30) | 16(4) × 1013 |
| CH3CN | 5 | 68−133 | 133 (81) | 1(5) × 1012 |
| CH3CCH | 3 | 75−103 | 23 (11) | 6(13) × 1013 |
| CH3CHO(b) | 3 | 26−182 | 42 (5) | 22(6) × 1012 |
Notes. (a)Column density is corrected for opacity, as mentioned in Sect. 4.2. (b)Column densities refer to the sum of the A and E types of methanol and acetaldehyde.
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