Predicting the detectability of sulphur-bearing molecules in the solid phase with simulated spectra of JWST instruments

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Table 1

Spectral data.

Molecule	Wavenumber	Wavelength	Band strength	Modes	Reference
Molecule	(cm⁻¹)	(µm)	(cm/molecule)	Modes	Reference
H₂S	2547.0	3.94	1.69 × 10⁻¹⁷	S–H stretch	Yarnall & Hudson (2022)
CS	1270.0	7.87	—	C–S sym. stretch	Bohn et al. (1992)
CS₂	1502.0	6.66	1.06 × 10⁻¹⁶	C–S asym. stretch	This work
CS₂	2145.0	4.66	2.09 × 10⁻¹⁸	C–S combination	This work
OCS	514.0	19.46	1.80 × 10⁻¹⁸	C–S bending	Hudgins et al. (1993)
OCS	2025.0	4.94	1.50 × 10⁻¹⁶	C–O sym. stretch	Hudgins et al. (1993)
SO₂	1323.0	7.49	4.2 × 10⁻¹⁷	S–O asym. stretch	Yarnall & Hudson (2022)
SO₂	1149.0	8.70	2.20 × 10⁻¹⁸	S–O sym. stretch	Garozzo et al. (2008)
SO	1130.0	8.85	2.20 × 10⁻¹⁸	S–O stretch	Garozzo et al. (2008)
S₃	680.0	14.71	~2.50 × 10⁻¹⁷	S-S stretch	Estimated value (see the text)
S₄	665.0	15.04	~5.00 × 10⁻¹⁷	S-S stretch	Estimated value (see the text)
S₈	471.0	21.23	1.50 × 10⁻¹⁹	S-S stretch	This work^(a)

Notes. Spectral data for some sulphur species reported from literature derived from deposited species or after irradiation, as well as our new measurements for CS₂ and S₈. ^(a) Spectrum measured at room temperature; all other species were measured at cryogenic temperatures ranging from 5.5 to 16 K.

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