H3+ 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 H3+ key parameters for astronomical models and analysis. A new high-accuracy, very extensive line list for H3+ 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
@article{arxiv.1704.04096,
title = {ExoMol molecular line lists XX: a comprehensive line list for H$_3^+$},
author = {Irina I. Mizus and Alexander Alijah and Nikolai F. Zobov and Lorenzo Lodi and Aleksandra A. Kyuberis and Sergei N. Yurchenko and Jonathan Tennyson and Oleg L. Polyansky},
journal= {arXiv preprint arXiv:1704.04096},
year = {2017}
}