molecules:ism:c10h [CDMS classic documentation]

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===== On the Detection of the Decapentaynylide Ion, C10H–, in Space =====

A. Remijan, H. N. Scolati, A. M. Burkhardt, P. B. Changala, S. B. Charnley, I. R. Cooke, M. A. Cordiner, H. Gupta, E. Herbst, K. L. K. Lee, R. A. Loomis, C. N. Shingledecker, M. A. Siebert, C. Xue, M. C. McCarthy, and B. A. McGuire\\
reported on\\
**[[https://doi.org/10.3847/2041-8213/acb648|Astronomical Detection of the Interstellar Anion C<sub>10</sub>H<sup>–</sup> toward TMC-1 from the GOTHAM Large Program on the Green Bank Telescope]]**\\
//Astrophys. J. Lett.// **944**, Art. No. L45 (2023).\\
The identification was made by stacking data from the line survey up to 30 GHz; most signal-contribution came from the 13.1 to 19.2 GHz region. The authors also report a tentative detection of C<sub>10</sub>H with a C<sub>10</sub>H<sup>–</sup> to C<sub>10</sub>H of roughly 2. In addition, C<sub>10</sub>H<sup>–</sup> is roughly 5 times more abundant than C<sub>8</sub>H<sup>–</sup> and about one third more abundant than C<sub>6</sub>H<sup>–</sup>.\\
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More recently,\\
J. R. Pardo, C. Cabezas, M. Agúndez, B. Tercero, N. Marcelino, P. de Vicente, M. Guélin, and J. Cernicharo\\
found\\
**[[https://doi.org/10.1051/0004-6361/202346498|A new heavy anion in IRC+10216: Theory favors C10H− versus C9N−]]**\\
//Astron. Astrophys.// **677**, Art. No. A55 (2023).\\
This time around, the molecule was identified in 15 not or not strongly blended transitions with 51 ≤ //J// ≤ 71 between 31 and 43 GHz in the course of a molecular line survey of the famous carbon rich AGB star CW Leonis carried out with the Yebes 40 m radio telescope.\\


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Contributor(s): H. S. P. Müller; 02, 2023; 09, 2023

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