A computed line list for the H2D+ molecular ion

Abstract

A comprehensive, calculated line list of frequencies and transition probabilities for the singly deuterated isotopologue of H3+, H2D+, is presented. The line list, called ST1, contains over 22 million rotational-vibrational transitions occurring between more than 33 thousand energy levels; it covers frequencies up to 18500 cm-1. All energy levels with rotational quantum number, J, up to 20 are considered, making the line list useful for temperatures up to at least 3000 K. About 15% of these levels are fully assigned with approximate rotational and vibrational quantum numbers. The list is calculated using a previously proposed, high accuracy, ab initio model and consistency checks are carried out to test and validate the results. These checks confirm the accuracy of the list. A temperature-dependent partition function, valid over a more extended temperature range than those previously published, and cooling function are presented. Temperature-dependent synthetic spectra in the frequency range 0 - 10000 cm-1 are also given.

7 pages, 3 figures, 5 tables

References in corpus (7)

• Survey of ortho-H2D+(1_{1,0}-1_{1,1}) in dense cloud cores
• Effects of primordial chemistry on the cosmic microwave background
• Detection of H2D+ in a massive prestellar core in Orion B
• Probable detection of H2D+ in the starless core Barnard 68
• H_2D^+: a light on baryonic dark matter?
• Far-Infrared detection of H2D+ toward Sgr B2
• H${}_2$D${}^{+}$ line emission in Proto-Planetary Disks