molecules:extragalactic:h2cl-plus_extragalactic [CDMS classic documentation]

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===== Chloronium, H2Cl+, in Extragalactic Sources =====

S. Muller, J. H. Black, M. Guélin, C. Henkel, F. Combes, M. Gérin, S. Aalto, A. Beelen, J. Darling, C. Horellou, S. Martín, K. M. Menten, Dinh-V-Trung, and M. A. Zwaan\\
reported on the\\

**[[https://doi.org/10.1051/0004-6361/201423947|Detection of chloronium and measurement of the 35Cl/37Cl isotopic ratio at //z// = 0.89 toward PKS 1830-211]]**\\
//Astron. Astrophys.// **566**, (2014) Art. No. L6.\\
The 1<sub>11</sub> - 0<sub>00</sub> transitions of H<sub>2</sub><sup>35</sup>Cl<sup>+</sup> and H<sub>2</sub><sup>37</sup>Cl<sup>+</sup> were observed with ALMA redshifted from about 485 GHz to about 257 GHz. The <sup>35</sup>Cl/<sup>37</sup>Cl isotopic ratio agrees within error bars with the terrestrial ratio.\\

S. H. J. Wallström, S. Muller, E. Roueff, R. Le Gal, J. H. Black, and M. Gérin\\
reported on the\\
**[[https://doi.org/10.1051/0004-6361/201935860|Chlorine-bearing Molecules in Molecular Absorbers at Intermediate Redshifts]]**\\
//Astron. Astrophys.// **566**, (2014) Art. No. L6.\\
Both chloronium isotopologs were also detected in the //z// ≈ 0.68 foreground galaxy of the quasar B 0218+357; the <sup>35</sup>Cl/<sup>37</sup>Cl isotopic ratio is about 2.2.\\

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Contributor(s): H. S. P. Müller; 06, 2014; 11, 2025

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