ExoMol line lists XXV: A hot line list for silicon sulphide, SiS

Abstract

SiS has long been observed in the circumstellar medium of the carbon-rich star IRC+10216 CW Leo. Comprehensive and accurate rotation-vibrational line lists and partition functions are computed for 12 isotopologues of silicon sulphide (${}^{28}$Si${}^{32}$S, ${}^{28}$Si${}^{34}$S, ${}^{29}$Si${}^{32}$S, ${}^{28}$Si${}^{33}$S, ${}^{30}$Si${}^{32}$S, ${}^{29}$Si${}^{34}$S, ${}^{30}$Si${}^{34}$S, ${}^{28}$Si${}^{36}$S, ${}^{29}$Si${}^{33}$S, ${}^{29}$Si${}^{36}$S, ${}^{30}$Si${}^{33}$S, ${}^{30}$Si${}^{36}$S) in its ground (X ${}^1{\Sigma }^{+}$) electronic state. The calculations employ an existing spectroscopically accurate potential energy curve (PEC) derived from experimental measurements and a newly-computed ab initio dipole moment curve (DMC). The ${}^{28}$Si${}^{32}$S line list includes 10104 states and 91715 transitions. These line lists are available from the ExoMol website www.exomol.com and the CDS database.

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