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| molecules:ism:butadiynyliminomethylium [2020/10/29 09:51] – mueller | molecules:ism:butadiynyliminomethylium [2022/12/27 14:14] (current) – mueller |
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| ===== Detection of Butadiynyliminomethylium, HC5N+, in the ISM ===== | ===== Detection of Protonated HC<sub>5</sub>N in the ISM ===== |
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| N. Marcelino, M. Agúndez, B. Tercero, C. Cabezas, C. Bermúdez, J. D. Gallego, P. de Vicente, and J. Cernicharo, \\ | N. Marcelino, M. Agúndez, B. Tercero, C. Cabezas, C. Bermúdez, J. D. Gallego, P. de Vicente, and J. Cernicharo, \\ |
| **[[https://doi.org/10.1051/0004-6361/202039251|Tentative Detection of HC<sub>5</sub>NH<sup>+</sup> in TMC-1]]**\\ | **[[https://doi.org/10.1051/0004-6361/202039251|Tentative Detection of HC<sub>5</sub>NH<sup>+</sup> in TMC-1]]**\\ |
| //Astron Astrophys.// **643**, Art. No. L6 (2020).\\ | //Astron Astrophys.// **643**, Art. No. L6 (2020).\\ |
| Seven transitions, //J"// = 12 and 18 between about 33.7 and 49.2 GHz, of a new, unknown molecule were detected 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. Quantum-chemical calculations yielded HC<sub>5</sub>NH<sup>+</sup> as the most likely carrier of these lines. The abundance ratio of HC<sub>5</sub>N to HC<sub>5</sub>NH<sup>+</sup> is ~500, very similar to that of HC<sub>3</sub>N to HC<sub>3</sub>NH<sup>+</sup>, which can be seen as additional support for the identification. The "tentative" in the title refers to the identification of the carrier, but may be viewed as almost definitive.\\ | Seven transitions, from //J"// = 12 to 18 between about 33.7 and 49.2 GHz, of a new, unknown molecule were detected 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. Quantum-chemical calculations yielded HC<sub>5</sub>NH<sup>+</sup> as the most likely carrier of these lines. The abundance ratio of HC<sub>5</sub>N to HC<sub>5</sub>NH<sup>+</sup> is ~240, very similar to that of HC<sub>3</sub>N to HC<sub>3</sub>NH<sup>+</sup>, which can be seen as additional support for the identification. The "tentative" in the title refers to the identification of the carrier. The spectroscopic parameters are very similar to those of **[[molecules:ism:NC4NH-plus|NC]]<sub>4</sub>NH<sup>+</sup>**. But with the detection of the latter, this has been settled.\\ |
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| Contributor(s): H. S. P. Müller 10, 2020 | Contributor(s): H. S. P. Müller 10, 2020; 03, 2022; 12, 2022 |
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