molecules:extragalactic:c2h3-plus_extragalactic [CDMS classic documentation]

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===== On Extragalactic Protonated Acetylene =====

 S. Muller, R. Le Gal, E. Roueff, J. H. Black, A. Faure, M. Guélin, A. Omont, M. Gérin, F. Combes, and S. Aalto\\
reported on the\\
**[[https://doi.org/10.1051/0004-6361/202348994|Protonated Acetylene in the //z// = 0.89 Molecular Absorber toward PKS 1830−211]]**\\
//Astron. Astrophys.// **683**, (2024) Art. No. A62.\\
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The molecule C<sub>2</sub>H<sub>3</sub><sup>+</sup> was identified through the //ortho//-transition 2<sub>12</sub> – 1<sub>01</sub> at a rest frequency of 494.034 GHz and through the //para//-transition 1<sub>11</sub> – 0<sub>00</sub> at a rest frequency of 431.315 GHz. Protonated acetylene is less abundant than C<sub>2</sub>H and C<sub>4</sub>H by factors of about 600 and 60, respectively.\\
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Contributor(s): H. S. P. Müller; 03, 2024

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