The ExoMol database: molecular line lists for exoplanet and other hot atmospheres

Abstract

The ExoMol database (www.exomol.com) provides extensive line lists of molecular transitions which are valid over extended temperatures ranges. The status of the current release of the database is reviewed and a new data structure is specified. This structure augments the provision of energy levels (and hence transition frequencies) and Einstein $A$ coefficients with other key properties, including lifetimes of individual states, temperature-dependent cooling functions, Landé $g$-factors, partition functions, cross sections, $k$-coefficients and transition dipoles with phase relations. Particular attention is paid to the treatment of pressure broadening parameters. The new data structure includes a definition file which provides the necessary information for utilities accessing ExoMol through its application programming interface (API). Prospects for the inclusion of new species into the database are discussed.

68 pages, 24 Tables, 1 figure. Updated corrects minor errors in format statements

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• CH in stellar atmospheres: an extensive linelist
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• ExoMol line lists VII: The rotation-vibration spectrum of phosphine up to 1500 K
• ExoMol molecular line lists V: The ro-vibrational spectra of NaCl and KCl
• Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths
• ExoMol molecular line lists: IX The spectrum of AlO
• The hyperfine energy levels of alkali metal dimers: ground-state polar molecules in electric and magnetic fields
• A search for TiO in the optical high-resolution transmission spectrum of HD 209458b: Hindrance due to inaccuracies in the line database
• The spectrum of hot methane in astronomical objects using a comprehensive computed line list
• Hubble Space Telescope detection of oxygen in the atmosphere of exoplanet HD189733b
• ExoMol line lists VIII: A variationally computed line list for hot formaldehyde
• The {\it ab initio} calculation of spectra of open shell diatomic molecules
• ExoMol molecular line lists X: The spectrum of sodium hydride
• Cool luminous stars: the hybrid nature of their infrared spectra -- Carbon, oxygen, and their isotopic abundances in 23 K - M giant stars
• Accurate \textit{ab initio} vibrational energies of methyl chloride
• A H13CN/HN13C linelist, model atmospheres and synthetic spectra for carbon stars
• Experimental energy levels and partition function of the ${}^{12}$C${}_2$ molecule
• The calculated rovibronic spectrum of scandium hydride, ScH
• Mechanism of Collisional Spin Relaxation in Triplet-Sigma Molecules
• A theoretical room-temperature line list for 15NH3
• Exomol molecular line lists VI: A high temperature line list for Phosphorus Nitride
• The rovibrational spectrum of BeH, MgH and CaH at high temperatures in the $X{}^2{\Sigma }^{+}$ state: a theoretical study
• Molecules as magnetic probes of starspots
• ExoMol line lists XV: A new hot line list for hydrogen peroxide
• Non-adiabatic preparation of spin crystals with ultracold polar molecules
• Hybrid variation-perturbation method for calculating rovibrational energy levels of polyatomic molecules
• A near infrared line list for \NH: Analysis of a Kitt Peak spectrum after 35 years
• Accurate Prediction of the Ammonia Probes of a Variable Proton-to-Electron Mass Ratio
• Visible line intensities of the triatomic hydrogen ion from experiment and theory
• A hybrid variational-perturbation calculation of the ro-vibrational spectrum of nitric acid
• The electronic bands of CrD, CrH, MgD and MgH: application to the "deuterium test"
• Collisions of paramagnetic molecules in magnetic fields: an analytic model based on Fraunhofer diffraction of matter waves
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• ARES V: No Evidence For Molecular Absorption in the HST WFC3 Spectrum of GJ 1132 b
• MARVEL analysis of the measured high-resolution rovibronic spectra of ${}^{48}$Ti${}^{16}$O
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• MARVEL analysis of the measured high-resolution rovibrational spectra of C2H2
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• Laboratory spectra of hot molecules: data needs for hot super-Earth exoplanets
• Self-consistent Models of Y Dwarf Atmospheres with Water Clouds and Disequilibrium Chemistry
• Awesome SOSS: Atmospheric Characterisation of WASP-96 b using the JWST Early Release Observations
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• The Metal-Rich Atmosphere of the Neptune HAT-P-26b
• On The Compatibility of Ground-based and Space-based Data: WASP-96 b, An Example
• A comparison of chemical models of exoplanet atmospheres enabled by TauREx 3.1
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• Direct Detection of Spin-(In)dependent Nuclear Scattering of Sub-GeV Dark Matter Using Molecular Excitations
• ARES III: Unveiling the Two Faces of KELT-7 b with HST WFC3
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• Radiative Transfer for Exoplanet Atmospheres
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• HST/WFC3 Constraints on the Abundances of OH and FeH in the Atmosphere of the Ultra-Hot Neptune LTT-9779 b
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• Metallic species in interstellar medium: Astrochemical modeling
• Atmospheric retrieval of Subaru/IRD high-resolution spectrum of the archetype T-type brown dwarf Gl 229 B
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