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| molecules:extragalactic:hcl_extragalactic [2025/11/17 14:01] – created mueller | molecules:extragalactic:hcl_extragalactic [2025/11/17 14:13] (current) – mueller |
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| S. H. J. Wallström, S. Muller, E. Roueff, R. Le Gal, J. H. Black, and M. Gérin\\ | S. H. J. Wallström, S. Muller, E. Roueff, R. Le Gal, J. H. Black, and M. Gérin\\ |
| reported on the\\ | reported on the\\ |
| **[[https://doi.org/10.1051/0004-6361/201423947|Detection of chloronium and measurement of the <sup>35</sup>Cl/<sup>37</sup>Cl isotopic ratio at //z// = 0.89 toward PKS 1830-211]]**\\ | **[[https://doi.org/10.1051/0004-6361/201935860|Chlorine-bearing Molecules in Molecular Absorbers at Intermediate Redshifts]]**\\ |
| //Astron. Astrophys.// **566**, (2014) Art. No. L6.\\ | //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.\\ | The 1 – 0 transitions of H<sup>35</sup>Cl and H<sup>37</sup>Cl were observed with ALMA in the //z// ≈ 0.89 foreground galaxy of the lensed quasar PKA 1830−211. The isotopologs were both detected in the molecule rich SW image, where a H<sub>2</sub>Cl<sup>+</sup> to HCl ratio of ~1 was obtained, and unsurprisingly not toward the more atomic NE image, where a H<sub>2</sub>Cl<sup>+</sup> to HCl ratio of > 17 was deduced. |
| | HCl was also not observed in the //z// ≈ 0.68 foreground galaxy of the lensed quasar B 0218+357.\\ |
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