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Table F.1

Line surface brightness of the most intense ro-vibrational transitions of CH+ with and without considering chemical pumping as predicted by RADEX considering the physical condition at ro-vibrational emission peak from the CLOUDY model noted in Table 3.

CH+ lines Wavelength Upper state Surface Brightness (erg cm−2 s−1 sr−1)
(v′, J′) → (v, J) (μm) energy / kB (K) Without pumping With pumping
v = 1 → 0

(1, 0) → (0, 1)[P(1)] 3.6876 3942 3.14 × 10−5 4.22 × 10−5
(1, 1) → (0, 0)[R(0)] 3.6146 3980 1.18 × 10−5 2.04 × 10−5
(1, 1) → (0, 2)[P(2)] 3.7272 3980 4.36 × 10−5 7.52 × 10−5
(1, 2) → (0, 3)[P(3)] 3.7689 4058 6.27 × 10−5 1.10 × 10−4
(1, 3) → (0, 4)[P(4)] 3.8129 4174 4.89 × 10−5 1.20 × 10−4
(1, 4) → (0, 5)[P(5)] 3.8591 4328 5.38 × 10−5 1.45 × 10−4
(1, 5) → (0, 6)[P(6)] 3.9078 4520 5.01 × 10−5 1.58 × 10−4
(1, 6) → (0, 7)[P(7)] 3.9589 4751 4.58 × 10−5 1.64 × 10−4
(1, 7) → (0, 8)[P(8)] 4.0125 5019 3.93 × 10−5 1.60 × 10−4
(1, 8) → (0, 9)[P(9)] 4.0688 5324 2.94 × 10−5 1.37 × 10−4
(1, 9) → (0, 10)[P(10)] 4.1278 5667 2.17 × 10−5 1.10 × 10−4
(1, 10) → (0, 11)[P(11)] 4.1896 6046 1.51 × 10−5 8.36 × 10−5
(1, 11) → (0, 12)[P(12)] 4.2545 6461 9.76 × 10−6 6.24 × 10−5
(1, 12) → (0, 13)[P(13)] 4.3224 6912 5.82 × 10−6 4.91 × 10−5
(1, 13) → (0, 14)[P(14)] 4.3936 7398 3.05 × 10−6 3.86 × 10−5
(1, 14) → (0, 15)[P(15)] 4.4681 7918 1.20 × 10−6 3.15 × 10−5
(1, 15) → (0, 16)[P(16)] 4.5462 8472 1.88 × 10−10 2.73 × 10−5

v = 2 → 1

(2, 6) → (1, 7)[P(7)] 4.1384 8495 4.45 × 10−6 3.35 × 10−5
(2, 7) → (1, 8)[P(8)] 4.1952 8754 4.17 × 10−7 3.06 × 10−5
(2, 8) → (1, 9)[P(9)] 4.2549 9048 2.44 × 10−8 2.94 × 10−5
(2, 9) → (1, 10)[P(10)] 4.3175 9378 3.25 × 10−9 2.66 × 10−5
(2, 10) → (1, 11)[P(11)] 4.3833 9743 9.50 × 10−10 2.26 × 10−5

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