ExoMol molecular line lists XX: a comprehensive line list for H${}_3^{+}$

Abstract

H${}_3^{+}$ is a ubiquitous and important astronomical species whose spectrum has been observed in the interstellar medium, planets and tentatively in the remnants of supernova SN1897a. Its role as a cooler is important for gas giant planets and exoplanets, and possibly the early Universe. All this makes the spectral properties, cooling function and partition function of H${}_3^{+}$ key parameters for astronomical models and analysis. A new high-accuracy, very extensive line list for H${}_3^{+}$ called MiZATeP was computed as part of the ExoMol project alongside a temperature-dependent cooling function and partition function as well as lifetimes for %individual excited states. These data are made available in electronic form as supplementary data to this article and at http://www.exomol.com

10 pages, 5 figures, 7 tables

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