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This article has an erratum: [https://doi.org/10.1051/0004-6361/202347174e]


Table 1.

Ground state rotational transition frequencies of H2CCCH+, determined by laboratory and astronomical detections.

Frequency/MHz obs-calc/kHz Source
212 → 111 37 702.627(10) 0.3 Astro (a)
202 → 101 38 037.044(10) 7.0 Astro (a)
211 → 110 38 368.581(20) 33.0 Astro (a)
515 → 414 94 254.055(4) 7.7 Lab
505 → 404 95 086.000(10) −12.8 Lab
514 → 413 95 918.753(3) 7.9 Lab
616 → 515 113 103.272(4) −2.6 Lab
606 → 505 114 099.086(6) 6.0 Lab
615 → 514 115 100.840(3) −2.7 Lab
717 → 616 131 951.635(3) −5.4 Lab
707 → 606 133 109.888(6) −3.9 Lab
716 → 615 134 282.033(4) −5.1 Lab
818 → 717 150 799.008(4) 5.3 Lab
808 → 707 152 118.074(5) 0.8 Lab
817 → 716 153 462.176(3) −3.7 Lab
10110 → 919 188 490.152(12) 1.6 Lab
1019 → 918 191 818.719(10) 27.3 Lab

Notes.

(a)

The uncertainty in the last digits of each line is provided in parentheses. Observed frequency assuming a Local Standard of Rest velocity (vLSR) of 5.83 km s−1 (Cernicharo et al. 2020a).

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