Table 1
Estimated temperature and column density of the observed species.
| Species | Temperature (K) | Column density (cm−2) | ||||||
|---|---|---|---|---|---|---|---|---|
| Other observation | LTE/LTE2 | RD | MCMC | Other observation | LTE/LTE2(*) | RD | MCMC | |
| Vinyl cyanide and its isotopologues | ||||||||
| C2H3CN | 200(a) | 150 | 155 ± 53 | 209.82 ± 18.02 | 7.0 × 1017(a) | 2.9 × 1017/6.0 × 1017(1.07) | (1.7 ± 0.4) × 1017 | (3.4 ± 0.44) × 1017 |
| 176 ± 35(b) | 2.0 × 1014/6.1 × 1016 | |||||||
| 13CH2CHCN | 150 | 119±18 | 125.86 ± 13.67 | - | 6.5 × 1015/9.60 × 1015(1.07) | (3.5 ± 0.4) × 1015 | (5.3 ± 0.46) × 1015 | |
| CH213CHCN | 150 | - | - | - | 2.8 × 1015/5.30 × 1015(0.78) | - | - | |
| CH2CH13CN | 150 | - | - | - | 3.0 × 1015/5.60 × 1015(0.70) | - | - | |
| CH2CHC15N | - | 150 | - | - | - | 9.0 × 1014 | - | - |
| CH2CDCN | - | 150 | - | - | - | 3.3 × 1015/1.00 × 1016(0.67) | - | - |
| Ethyl cyanide with its isotopologues and isomer | ||||||||
| C2H5CN | 200(a) | 150 | 92 ± 18 | 104.11 ± 9.98 | 9 × 1017a | 2.3 × 1017/3.80 × 1017(1.35) | (1.2 ± 0.3) × 1017 | (1.7 ± 0.10) × 1017 |
| 103 ± 12(b) | 3.6 × 1014/1.1 × 1017 | |||||||
| 13CH3CH2CN | - | 150 | 220 ± 112 | 130.79 ± 23.17 | - | 8.5 × 1015/1.5 × 1016(1.16) | (9.7 ± 2.3) × 1015 | (7.8 ± 1.12) × 1015 |
| CH313CH2CN | 150 | - | - | 8.0 × 1015 | - | - | ||
| CH3CH213CN | 150 | - | - | 3.2 × 1015/4.70 × 1015(1.22) | - | - | ||
| C2H5C15N | - | 150 | - | - | - | 3.1 × 1015 | - | - |
| C2H5NC | 150 | - | - | 4.0 × 1015/6.40 × 1015(1.05) | - | - | ||
| Cyanoacetylene and its isotopologues | ||||||||
| HC3N | 200(a)/500(a) | 150 | 5.0 × 1016a/1018a | 4.1 × 1015/4.0 × 1015(2.18) | ||||
| HC13CCN | 150 | 1.4 × 1015/2.30 × 1015(1.17) | ||||||
| HCC13CN | 150 | 1.7 × 1015/2.80 × 1015(1.16) | ||||||
| Cyanodiacetylene and its isotopologues | ||||||||
| HC5N | 150.0 | 7.7 × 1014/1.70 × 1015(1.20) | ||||||
| HCC13CCCN | 150.0 | 1.0 × 1015/2.35 × 1015(0.95) | ||||||
| Cyanamide | ||||||||
| NH2CN | 200(a) | 150.0 | 2.0 × 1016(a) | 4.8 × 1015/1.30 × 1016(0.86) | - | |||
| Aminoacetonitrile | ||||||||
| H2NCH2CN | 150.0 | 5.5 × 1015/9.30 × 1015(1.07) | - | |||||
| Methylacetylene and its isotopologues | ||||||||
| CH3CCH | 150.0 | 188.9 ± 16 | 219.12 ± 14.80 | 7.0 × 1016/8.30 × 1016(1.67) | (6.0 ± 0.5) × 1016 | (8.7 ± 0.75) × 1016 | ||
| CH313CCH | 150 | 8.0 × 1015/9.80 × 1015(1.17) | - | |||||
| Other nitrogen-bearing molecules | ||||||||
| HCN | 200(a)/500(a) | 1.0 × 1018/3.0 × 1018 | ||||||
| CH3NH2 | 64(c) | 6.3 × 1015 | ||||||
| CH2NH | 84/84(d) | 2.1 × 1017/4.7 × 1015 | ||||||
| CH3CN | 408/82(e) | 5.1 × 1017/4.1 × 1014 | ||||||
| 240/180(f) | 6.0 × 1016/3.6 × 1015 | |||||||
| CH3NCO | 248 ± 19(g) | 1.2 × 1017 | ||||||
| HNCO | 317 ± 25(g) | 1.3 × 1017 | ||||||
| NH2CHO | 439 ± 100(g) | 3.8 × 1016 | ||||||
| 200(a) | 2.0 × 1017 | |||||||
Notes. (a)Rolffs et al. (2011b), consider source size 1.5″, H2 column density 5.0 × 1024 cm−2, and an additional component of 0.5″ and 500 K, which are used for HC3N and HCN; (b)Fontani et al. (2007), low value column density is beam averaged (23″) and high value column density is source averaged (1.3″), consider H2 column density 1.2 × 1025 cm−2; (c)Ohishi et al. (2019), considering source size 10″ and H2 column density 2.6 × 1023 cm−2; (d)Suzuki et al. (2016), for high column density, considering source size 1.4″ and H2 column density 6.69 × 1024 cm−2 and low column density obtained, considering source size 10″ and H2 column density 1.3 × 1023 cm−2; (e)Hernández-Hernández et al. (2014), a high rotational temperature and column density are for compact component ~0.6″ and low for extended components ~4.0″, consider H2 column density 6.69 × 1024 cm−2; (f)Olmi et al. (1996), consider two component structure:a dense compact core ~1″–2″ and the halo extended about 10 times larger than core; (g) Gorai et al. (2020), using same observation data; (*)The average source size (in arcsec) that value is used for LTE modeling (LTE2) is noted in parentheses.
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