Table 3
Kinetic temperatures, hydrogen nuclei number densities, and column densities of the species resulting from the multi-transition analysis described in Sect. 4.
| TMC 1-C | TMC 1-C (P) | TMC 1-CP | TMC 1-CP (P1) | TMC 1-CP (P2) | ||
|---|---|---|---|---|---|---|
| Tk (K)(a) | 7.4 ± 2.1 | 8.7 ± 1.9 | 9.0 ± 2.1 | 9.3 ± 1.8 | 9.1 ± 1.6 | |
| CS | nH (cm−3) | (1.4 ± 0.8) × 105 | (8.8 ± 6.0) × 104 | (6.2 ± 2.0) × 104 | (6.7 ± 2.5) × 104 | (7.0 ± 4.6) × 104 |
| N (cm−2) | (1.0 ± 0.5) × 1014 | (1.2 ± 0.9) × 1014 | (2.9 ± 1.8) × 1014 | (1.6 ± 1.2) × 1014 | (2.5 ± 0.9) × 1014 | |
| DNC | nH (cm−3) | (1.8 ± 0.5) × 105 | (2.4 ± 0.5) × 105 | (4.0 ± 1.0) × 105 | (3.0 ± 0.6) × 105 | (4.0 ± 0.8) × 105 |
| N (cm−2) | (3.0 ± 0.9) × 1012 | (3.2 ± 0.7) × 1012 | (2.0 ± 0.5) × 1012 | (2.8 ± 0.5) × 1012 | (2.5 ± 0.4) × 1012 | |
| DN13C | nH (cm−3) | (4.1 ± 1.2) × 105 | − | − | − | − |
| N (cm−2) | (8.5 ± 2.4) × 1010 | |||||
| DCN | N (cm−2) | (2.5 ± 0.7) × 1012 | (5.0 ± 1.1) × 1012 | (2.3 ± 0.5) × 1012 | (3.5 ± 0.7) × 1012 | (3.5 ± 0.6) × 1012 |
| N2H+ | Nupp (cm−2) (b) | (1.2 ± 0.3) × 1013 | (1.0 ± 0.2) × 1013 | (6.0 ± 1.4) × 1012 | (6.0 ± 1.2) × 1012 | (5.0 ± 0.9) × 1012 |
| Nlow (cm−2) (c) | (8.0 ± 2.0) × 1012 | (5.0 ± 1.0) × 1012 | (3.5 ± 0.8) × 1012 | (4.2 ± 0.8) × 1012 | (3.0 ± 0.6) × 1012 | |
| N2D+ | N (cm−2) | (1.8 ± 0.5) × 1012 | (1.5 ± 0.3) × 1012 | <3.5 × 1011 | <3.0 × 1011 | <3.0 × 1011 |
| N(DNC)/N(DCN) | 2.04 ± 0.82 | 0.64 ± 0.20 | 0.87 ± 0.29 | 0.80 ± 0.22 | 0.71 ± 0.18 | |
| N(N2D+)/N(N2H+)upp | 0.15 ± 0.06 | 0.15 ± 0.04 | <0.06 | <0.05 | < 0.06 | |
| N(N2D+)/N(N2H+)low | 0.23 ± 0.08 | 0.30 ± 0.08 | <0.10 | <0.07 | <0.10 | |
| N(N2H+)upp/N(CS) | 0.09 ± 0.05 | 0.08 ± 0.06 | 0.02 ± 0.01 | 0.04 ± 0.03 | 0.02 ± 0.01 | |
Notes. (a) We assume the kinetic temperatureTk and the hydrogen nuclei number densities nH obtained from CS and DNC multi-transition fitting (in bold) to derive the DCN, N2H+, and N2D+ column densities. (b)Upper bound value for the column density obtained assuming the Tk and n(H2) values in bold and fitting the opacity of the main component and the brightness of the weakest hyperfine component as explained in Sect. 4.2. (c) Lower bound value for the column density obtained in the low excitation temperature scenario discussed in Sect. 6.
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.