Table C.1
Laboratory data of ices and ice mixtures.
| Ice | Mode λ (μm) |
Band strength A(a) (cm molec.−1) |
Laboratory data | Reference T (K) |
|---|---|---|---|---|
| H2O | 13 Libration | 2.8(-17) | pure H2O | 15 Öberg et al. (2007) 75 Öberg et al. (2007) |
| OCN− | 7.6 Comb. (2v2) | 8.7(-18) | OCN−:NH+4 | 80 Novozamsky et al. (2001) |
| SO2 | 7.6 SO2 stretch | 3.4(-17) | SO2:CH3OH(1:1) | 10 Boogert et al. (1997) |
| H2CO | 8.0 CH2 rock | 1.5(-18) | pure H2CO | 15 Terwisscha van Scheltinga et al. (2021) |
| CH4 | 7.7 CH4 deform | 8.4(-18) | CH4:H2O(1:10) | 16 Rocha et al. (2017) |
| HCOO− | 7.4 CO stretch | 1.7(-17) | NH4COOH:H2O (7:100) | 14 Gálvez et al. (2010) |
| HCOOH | 8.2 C-O stretch | 2.9(-17) | pure HCOOH | 15 Bisschop et al. (2007) |
| CH3CHO | 7.4 CH3 sym. def.+CH wag | 4.1(-18) | CH3CHO:H2O(1:20) | 15 Terwisscha van Scheltinga et al. (2018) |
| CH3OCHO | 8.3 C-O stretch | 2.5(-17) | CH3OCHO:CO (1:20) | 15 Terwisscha van Scheltinga et al. (2021) |
| CH3COOH | 7.8 OH bend | 4.6(-17) | CH3COOH:H2O(1:10) | 16(b) |
| C2H5OH | 7.2 CH3 sym. def. | 2.4(-18) | C2H5OH:H2O(1:20) | 15 Terwisscha van Scheltinga et al. (2018) |
| CH3OCH3 | 8.6 COC stretch+CH3 rock | 5.6(-18) | CH3OCH3:H2O(1:20) | 15 Terwisscha van Scheltinga et al. (2018) |
| CH3COCH3 | 7.3 CH3 asym. stretch | 1.0(-17) | CH3COCH3:H2O (1:20) | 15 Rachid et al. (2020) |
Notes. The format of the band strength is a(b)=a × 10b. All data, except for CH3COOH, were taken from the The Leiden Ice Database for Astrochemistry (Rocha et al. 2022).
(a)Band strengths are taken from Chen et al. (2024, and references within), except for H2O (Mastrapa et al. 2009) and OCN− (Rocha et al. 2024; Gerakines et al. 2025).
(b): M. H. Moore et al. at NASA’s Goddard Space Flight Center (https://science.gsfc.nasa.gov/691/cosmicice/spectra.html)
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