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| molecules:ism:c_no [2021/12/20 13:27] – [Oxopentatetraenylidene, C<sub>5</sub>O] mueller | molecules:ism:c_no [2021/12/20 14:44] – [Oxopropadienylidene, C<sub>3</sub>O] mueller |
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| ==== Oxopropadienylidene, C<sub>3</sub>O ==== | ==== Oxopropadienylidene, C<sub>3</sub>O ==== |
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| | H. E. Matthews, W. M. Irvine, P. Friberg, R. D. Brown, and P. D. Godfrey\\ |
| | reported on\\ |
| | **[[https://doi.org/10.1038/310125a0|A new Interstellar Molecule: Tricarbon Monoxide]]**\\ |
| | //Nature// **310**, 125–126 (1984).\\ |
| | The //J// = 2 − 1 transitions near 19.2 GHz was detected with good signal-to-noise ratio toward TMC-1 using the 43 m GBT.\\ |
| | \\ |
| | |
| | R. D. Brown, P. D. Godfrey, D. M. Cragg, E. H. N. Rice, W. M. Irvine, P. Friberg, H. Suzuki, M. Ohishi, N. Kaifu, and M. Morimoto\\ |
| | extended the previous study subsequently in\\ |
| | **[[https://doi.org/10.1086/163528|Tricarbon Monoxide in TMC-1]]**\\ |
| | //Astrophys. J. // **297**, 302–308 (1985).\\ |
| | The //J// = 5 − 4, 8 − 7, and 9 − 8 transitions near 48.1, 77.0, and 86.6 GHz were detected using various telescopes.\\ |
| | \\ |
| | |
| | The molecules was also detected in the circumstellar envelope of the C-rich AGB star CW Leonis by\\ |
| | E. D. Tenenbaum, A. J. Apponi, L. M. Ziurys, M. Agúndez, J. Cernicharo, J. R. Pardo, and M. Guélin\\ |
| | **[[https://doi.org/10.1086/508166|Detection of C<sub>3</sub>O in IRC +10216: Oxygen-Carbon Chain Chemistry in the Outer Envelope]]**\\ |
| | //Astrophys. J. // **297**, 302–308 (1985).\\ |
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| ==== Oxopentatetraenylidene, C<sub>5</sub>O ==== | ==== Oxopentatetraenylidene, C<sub>5</sub>O ==== |
| Survey]]**\\ | Survey]]**\\ |
| //Astron. Astrophys.// **656**, Art. No. L21 (2021).\\ | //Astron. Astrophys.// **656**, Art. No. L21 (2021).\\ |
| Oxopentatetraenylidene, C<sub>5</sub>O, was identified through six rotational transitions with 11 ≤ //J// ≤ 17 in the course of a molecular line survey of the prototypical cold dark molecular cloud TMC-1 carried out with the Yebes 40 m radio telescope between 31.0 and 50.3 GHz. Four transitions were unblended or only slightly blended, two were somewhat more blended. A value of //T//<sub>rot</sub> = 10.0 ± 0.5 K was derived through a rotation diagram. | Oxopentatetraenylidene, C<sub>5</sub>O, was identified through six rotational transitions with 11 ≤ //J// ≤ 17 in the course of a molecular line survey of the prototypical cold dark molecular cloud TMC-1 carried out with the Yebes 40 m radio telescope between 31.0 and 50.3 GHz. Four transitions were unblended or only slightly blended, two were somewhat more blended. A value of //T//<sub>rot</sub> = 10.0 ± 0.5 K was derived through a rotation diagram. C<sub>5</sub>O is about 50 times less abundant than C<sub>2</sub>O and about 80 times less abundant than C<sub>3</sub>O. Only upper limits were derived for C<sub>4</sub>O and C<sub>6</sub>O; these were in both cases higher than those of C<sub>5</sub>O and thus not particularly constraining.\\ |
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