Table 1.
Ground state rotational transition frequencies of H2CCCH+, determined by laboratory and astronomical detections.
 |
Frequency/MHz | obs-calc/kHz | Source |
|---|---|---|---|
| 212 ← 111 | 37702.627(10) | 0.3 | Astro (a) |
| 202 ← 101 | 38037.044(10) | 7.0 | Astro (a) |
| 211 ← 110 | 38368.581(20) | 33.0 | Astro (a) |
| 515 ← 414 | 94254.055(4) | 7.7 | Lab |
| 505 ← 404 | 95086.000(10) | −12.8 | Lab |
| 514 ← 413 | 95918.753(3) | 7.9 | Lab |
| 616 ← 515 | 113103.272(4) | −2.6 | Lab |
| 606 ← 505 | 114099.086(6) | 6.0 | Lab |
| 615 ← 514 | 115100.840(3) | −2.7 | Lab |
| 717 ← 616 | 131951.635(3) | −5.4 | Lab |
| 707 ← 606 | 133109.888(6) | −3.9 | Lab |
| 716 ← 615 | 134282.033(4) | −5.1 | Lab |
| 818 ← 717 | 150799.008(4) | 5.3 | Lab |
| 808 ← 707 | 152118.074(5) | 0.8 | Lab |
| 817 ← 716 | 153462.176(3) | −3.7 | Lab |
| 10110 ← 919 | 188490.152(12) | 1.6 | Lab |
| 1019 ← 918 | 191818.719(10) | 27.3 | Lab |
Notes. The uncertainty in the last digits of each line is provided in parentheses.
(a)
Observed frequency assuming a Local Standard of Rest velocity (vLSR) of 5.83 km s−1 (Cernicharo et al. 2020).
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