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Table 3
Observed line parameters of H2CCC in TMC-1C and L1544.
| Transition | Frequency | Ref. | E up | T mb | rms | W | B eff | θ MB | V LSR a | Δv a | N b | |
 – 
|
(GHz) | (cm-1) | (mK) | (mK) | (K km s-1) | (%) | (′′) | (km s-1) | (km s-1) | (× 1010 cm-2) | ||
|
|
||||||||||||
| TMC- 1Cc | ||||||||||||
| 414 – 313 (ortho) | 82.395 | 1 | 6.18 | 70(9) | 7 | 0.024(2) | 81 | 30 | 5.98(1) | 0.32(3) | 27(1) | |
| 404 – 303 (para) | 83.165 | 1 | 6.94 | 45(20) | 6 | 0.011(2) | 81 | 30 | 6.07(2) | 0.2(1) | 5.9(6) | |
| 515 – 414 (ortho) | 102.992 | 1 | 9.62 | 57(10) | 7 | 0.012(2) | 80 | 25 | 5.97(1) | 0.18(3) | 25(2) | |
| 505 – 404 (para) | 103.953 | 1 | 10.40 | 31(5) | 3 | 0.007(1) | 80 | 25 | 6.03(1) | 0.21(2) | 8.7(7) | |
| L1544d | ||||||||||||
| 515 – 414 (ortho) | 102.992 | 1 | 9.62 | 69(8) | 10 | 0.037(3) | 80 | 25 | 7.11(2) | 0.50(5) | 83(4) | |
| 505 – 404 (para) | 103.953 | 1 | 10.40 | 53(12) | 10 | 0.024(4) | 80 | 25 | 7.18(3) | 0.42(7) | 30(3) | |
Notes.
Reference. (1) Vrtilek et al. (1990).
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