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Home All issues Volume 599 (March 2017) A&A, 599 (2017) A130 Full HTML
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Table 2

Analysis of low-temperature infrared spectra for selected spectrally isolated vibrational modes.

132Xe21 + (100 K) 132Xe21 + (40 K) (25 K)
Species Band position A a ∫τdν b N c ∫τdν b N c ∫τdν b N c
(cm-1) (cm/molecule) (cm-1) (1016 cm-2) (cm-1) (1016 cm-2) (cm-1) (1016 cm-2)
H2 4130 < 9.4 × 10-20 < 2.9 × 10-2 − 0.125 >94 0.272 >205
CH4 1300 8.0 ± 1.5 × 10-18 1.35 11.9 ± 2.2 1.47 13.0 ± 2.4 0.35 3.06 ± 0.57
C2H2 3240 2.52 ± 0.90 × 10-17 14.6 40.9 ± 14.6 17.3 48.5 ± 17.3 0.59 1.68 ± 0.60
C2H2 760 2.11 ± 0.27 × 10-17 12.3 41.2 ± 5.3 14.6 48.9 ± 6.3 0.61 2.04 ± 0.26

Notes.

(a)

See text for details on the integrated absorption cross sections A used to derive the column densities;

(b)

Integrated optical depth over the band.

(c)

Column density for the considered species.

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