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Table 1

Astronomical measurements of the 35Cl/37Cl ratio.

Source 35Cl/37Cl Species Ref.

Solar system 3.13 Cl 1

IRC+10216 2.3 ± 0.5 NaCl, AlCl 2
Ori A ~4–6 HCl 3
IRC+10216 3.1 ± 0.6 NaCl, KCl, AlCl 4
IRC+10216 2.30 ± 0.24 NaCl, AlCl 5
W3 A 2.1 ± 0.5 HCl 6
NGC 6334I, Sgr B2(S) ~2.7–3.3 H2Cl+and HCl 7
10 Galactic sources ~1–5 HCl 8
W31 C, Sgr A ~2–4 H2Cl+ 9
W31 C 2.1 ± 1.5 HCl+ 10
W31 C ~2.9 HCl 11
CRL 2136 2.3 ± 0.4 HCl 12

PKS 1830211(SW) H2Cl+ 13
PKS 1830211(NE) >1.9* H2Cl+ 13

Notes.

(†)

The line was detected in absorption against the background source.

(‡)

Possible confusion between absorption and emission features.

(⋄)

A CH feature might partially blend with the H37Cl signal, possibly affecting the derived value of the ratio.

(*)

At 99.7% confidence level.

Reference. (1) Lodders (2003); (2) Cernicharo & Guélin (1987); (3) Salez et al. (1996); (4) Cernicharo et al. (2000); (5) Kahane et al. (2000); (6) Cernicharo et al. (2010); (7) Lis et al. (2010); (8) Peng et al. (2010); (9) Neufeld et al. (2012); (10) de Luca et al. (2012); (11) Monje et al. (2013); (12) Goto et al. (2013); (13) this work.

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