ExoMol line lists VII: The rotation-vibration spectrum of phosphine up to 1500 K

Abstract

A comprehensive hot line list is calculated for ${}^{31}$PH${}_3$ in its ground electronic state. This line list, called SAlTY, contains almost 16.8 billion transitions between 7.5 million energy levels and it is suitable for simulating spectra up to temperatures of 1500~K. It covers wavelengths longer than 1~$\mu$m and includes all transitions to upper states with energies below $hc\cdot 18000$~cm${}^{-1}$ and rotational excitation up to $J=46$. The line list is computed by variational solution of the Schrödinger equation for the rotation-vibration motion employing the nuclear-motion program TROVE. A previously reported {\it ab initio} dipole moment surface is used as well as an updated `spectroscopic' potential energy surface (PES), obtained by refining an existing \textit{ab initio} surface through least-squares fitting to the experimentally derived energies. Detailed comparisons with other available sources of phosphine transitions confirms SAlTY's accuracy and illustrates the incompleteness of previous experimental and theoretical compilations for temperatures above 300 K. Atmospheric models are expected to severely underestimate the abundance of phosphine in disequilibrium environments, and it is predicted that phosphine will be detectable in the upper troposphere of many substellar objects. This list is suitable for modelling atmospheres of many astrophysical environments, namely carbon stars, Y dwarfs, T dwarfs, hot Jupiters and solar system gas giant planets. It is available in full as supplementary data to the article and at \url{www.exomol.com}.

arXiv commentMNRAS in press 19 pages, 10 figures, 4 tables

References in corpus (13)

• A high accuracy computed water line list
• ExoMol: molecular line lists for exoplanet and other atmospheres
• ExoMol line lists IV: The rotation-vibration spectrum of methane up to 1500 K
• A variationally computed line list for hot NH3
• Atmospheric Chemistry in Giant Planets, Brown Dwarfs, and Low-Mass Dwarf Stars II. Sulfur and Phosphorus
• Water Clouds in Y Dwarfs and Exoplanets
• Confirmation of circumstellar phosphine
• Chemical Kinetics on Extrasolar Planets
• Temperature-dependent molecular absorption cross sections for exoplanets and other atmospheres
• The spectrum of hot methane in astronomical objects using a comprehensive computed line list
• A Computed Room Temperature Line List for Phosphine
• Spectroscopic parameters of phosphine, PH3, in its ground vibrational state
• Upper limits for PH3 and H2S in Titan's Atmosphere from Cassini CIRS

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