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| molecules:ism:hc7nh-plus [2022/03/25 10:58] – created mueller | molecules:ism:hc7nh-plus [2022/03/25 11:15] (current) – mueller |
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| ===== Detection of Protonated HC<sub>5</sub>N in the ISM ===== | ===== Detection of Protonated HC<sub>7</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, \\ | C. Cabezas, M. Agúndez, N. Marcelino, B. Tercero, R. Fuentetaja, P. de Vicente, and J. Cernicharo,\\ |
| reported on the\\ | reported on the\\ |
| **[[https://doi.org/10.1051/0004-6361/202039251|Tentative Detection of HC<sub>5</sub>NH<sup>+</sup> in TMC-1]]**\\ | **[[https://doi.org/10.1051/0004-6361/202142972|Discovery of a new molecular ion, HC<sub>7</sub>NH<sup>+</sup>, in TMC-1]]**\\ |
| //Astron Astrophys.// **643**, Art. No. L6 (2020).\\ | //Astron Astrophys.// **659**, Art. No. L8 (2022).\\ |
| 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 that may be viewed as almost definitive.\\ | Nine transitions, from //J"// = 28 to 36 between about 32.1 and 41.0 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>7</sub>NH<sup>+</sup> as the most likely carrier of these lines. The abundance ratio of HC<sub>7</sub>N to HC<sub>7</sub>NH<sup>+</sup> is ~350, somewhat higher than those of HC<sub>5</sub>N to HC<sub>5</sub>NH<sup>+</sup> and HC<sub>3</sub>N to HC<sub>3</sub>NH<sup>+</sup>, of ~240 and ~230, respectively, which can be seen as additional support for the identification.\\ |
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