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| molecules:ism:hccnc [2024/04/08 13:27] – mueller | molecules:ism:hccnc [2024/04/09 10:31] (current) – mueller |
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| **[[https://doi.org/10.1051/0004-6361/202348822|Study of the HCCNC and HNCCC isotopologs in TMC-1]]**\\ | **[[https://doi.org/10.1051/0004-6361/202348822|Study of the HCCNC and HNCCC isotopologs in TMC-1]]**\\ |
| //Astron. Astrophys.// **682**, Art. No. L13 (2024).\\ | //Astron. Astrophys.// **682**, Art. No. L13 (2024).\\ |
| | They reported in the framework of improved data of the above survey the detection of HCC<sup>15</sup>NC with a <sup>14</sup>N/<sup>15</sup>N ratio of roughly 240, slightly lower than ~317 obtained for HC<sub>3</sub>N. However, this value may be affected by a probable but at that time unrecognized blending of the //J// = 5 − 4 transition of HCC<sup>15</sup>NC (J. Cernicharo, private communication). They also redetermined the <sup>12</sup>C/<sup>13</sup>C ratios. The values are ~95 with scatter that is insignificant with respect to the uncertainties. These values are somewhat lower than ~65 usually found in the the local ISM, but very similar to values of HNC<sub>3</sub> <sup>13</sup>C isotopomers and to two of the three HC<sub>3</sub>N <sup>13</sup>C isotopomers. An H/D ratio of ~31 was reported, substantially lower than ~55 observed for HNC<sub>3</sub> and HC<sub>3</sub>N.\\ |
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