Table 1
Molecular column densities derived toward the dust peaks of L1521E and L1544.
| Molecule | Column density (cm−2) | |
|---|---|---|
| L1521E | L1544 | |
| SO | (1.6 ± 0.5) × 1013 | (1.5 ± 0.5) × 1013 |
| 13CS | (1.6 ± 0.5) × 1012 | (2.5 ± 0.8) × 1011 |
| OCS | (2.3 ± 0.7) × 1013 | (8.9 ± 2.7) × 1012 |
| C2S | (1.4 ± 0.4) × 1013 | (4.8 ± 1.4) × 1012 |
| C3S | (8.2 ± 2.5) × 1013 | (5.7 ± 1.7) × 1012 |
| C33S | (1.4 ± 0.4) × 1012 | (2.3 ± 0.7) × 1011 |
| C34S | (2.9 ± 0.9) × 1012 | (6.1 ± 1.8) × 1011 |
| CC34S | (8.3 ± 2.5) × 1011 | – |
| HCS+ | (1.1 ± 0.3) × 1012 | (4.4 ± 1.3) × 1011 |
| H2CS | (1.8 ± 0.5) × 1013 | (6.0 ± 1.8) × 1012 |
| C17O | (1.2 ± 0.4) × 1014 | – |
| HC3N | (8.4 ± 2.5) × 1012 | (1.1 ± 0.3) × 1013 |
| c-C3H2 | (1.3 ± 0.4) × 1012 | (4.3 ± 1.3) × 1012 |
| C4H | (1.6 ± 0.5) × 1014 | (2.0 ± 0.6) × 1014 |
| HN13C | (6.0 ± 1.8) × 1011 | (2.0 ± 0.6) × 1012 |
| CH3OH (E2) | (1.9 ± 0.6) × 1013 | (2.2 ± 0.7) × 1013 |
| CH3OH (A+) | (5.7 ± 1.7) × 1012 | (7.3 ± 2.2) × 1012 |
| CH3CCH | (2.1 ± 0.6) × 1013 | (4.9 ± 1.5) × 1013 |
| CH3CHO | (8.3 ± 2.5) × 1010 | (6.2 ± 1.9) × 1010 |
| l-C4H2 | (4.1 ± 1.2) × 1011 | – |
| H2CCO | (1.4 ± 0.4) × 1012 | – |
| CH3CN | (4.8 ± 1.4) × 1011 | (6.1 ± 1.8) × 1011 |
| HC18O+ | (6.7 ± 2.0) × 1010 | (8.3 ± 2.5) × 1010 |
| H13CN | (1.6 ± 0.5) × 1012 | (2.6 ± 0.8) × 1012 |
| HCO | (7.0 ± 2.1) × 1011 | (5.0 ± 1.5) × 1011 |
| HCN | (2.4 ± 0.7) × 1012 | (1.3 ± 0.4) × 1012 |
| HCO+ | (1.3 ± 0.4) × 1012 | (3.2 ± 1.0) × 1011 |
| N2H+ | (2.5 ± 0.8) × 1013 | (2.0 ± 0.6) × 1014 |
| HNCO | (9.3 ± 2.8) × 1012 | (1.6 ± 0.5) × 1013 |
| C2H | (7.6 ± 2.3) × 1013 | (9.5 ± 2.9) × 1013 |
| CN | (1.2 ± 0.4) × 1013 | – |
Notes. The column densities toward L1544 are based on data from the ASAI (Lefloch et al. 2018). The assumed excitation temperature was 10 K for CO and 4.5 K for the other species for L1521E, and 5 K for L1544. The used transitions are shown in Table A.1 with asterisk, except for C3S (92488.5 MHz), CH3CHO (95947.4 MHz), and H2CCO (101981.4 MHz), to be consistent between the two sources. The SO column density is based on the 34SO column density and an isotopic ratio of 22 (Wilson & Rood 1994).
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