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--- molecules:ism:ecp [2022/08/03 10:51] – mueller
+++ molecules:ism:ecp [2023/09/27 15:57] (current) – mueller
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 **[[https://doi.org/10.1051/0004-6361/202244399|Discovery of fulvenallene in TMC-1 with the QUIJOTE line survey]]**\\
 //Astron. Astrophys.// **663**, Art. No. L9 (2022).\\
-The molecular line survey was carried out with the Yebes 40 m radio telescope between 31.0 and 50.4 GHz. Ethenylidenecyclopentadiene, aka fulvenallene, was detected in several //a//-type transitions having 8 ≤ //J// ≤ 14 and //K<sub>a</sub>// ≤ 3. A considerable fraction of the lines is not or only slightly blended. A value of //T//<sub>rot</sub> = 9 ± 1 K was derived through a rotation diagram. The column densities (in units of 10<sup>10</sup> cm<sup>−2</sup>) of the butenenitriles is about 5, 13, 10, 7, and 8 for the //E//-1-, //Z//-1-, 2-, //syn//-3-, and //gauche//-3-forms, respectively, compared to ~4 × 10<sup>13</sup> cm<sup>−2</sup> for propene. The combined cyanopropenes are much less abundant in relation to its parent hydrocarbon compared to other detected cyanide derivatives. It is also noteworthy to point out that the abundances among the cyanopropenes do not at all reflect relative energies among these species.\\
+The molecular line survey was carried out with the Yebes 40 m radio telescope between 31.0 and 50.4 GHz. Ethenylidenecyclopentadiene, aka fulvenallene, was detected in several //a//-type transitions having 8 ≤ //J// ≤ 14 and //K<sub>a</sub>// ≤ 3. A considerable fraction of the lines is not or only slightly blended. A value of //T//<sub>rot</sub> = 9 ± 1 K was derived through a rotation diagram. Its column density is only about a factor of 4.5 lower than that of cyclopentadiene and about a factor of 11 to 26 of what has been estimated for ethene.\\
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