Observation of electric-quadrupole infrared transitions in water vapor

Campargue, A.; Kassi, S.; Yachmenev, Andrey; Kyuberis, Aleksandra A.; Küpper, Jochen; Yurchenko, Sergei N.

doi:10.1103/physrevresearch.2.023091

Cited by 26 publications

(57 citation statements)

References 46 publications

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“…A new room temperature line list CKYKKY for H 2 O containing electric quadrupole moments was computed using an ab initio quadrupole moment surface [226] and accurate empirical PES by Mizus et al [227] with the variational program TROVE [228] . The energies were replaced by the H 2 O IUPAC MARVEL values [217] or HITRAN values [229] , if available.…”

Section: H 2 O Papers XIX and Xxxmentioning

confidence: 99%

The 2020 release of the ExoMol database: Molecular line lists for exoplanet and other hot atmospheres

Tennyson

Yurchenko

Al-Refaie

et al. 2020

Journal of Quantitative Spectroscopy and Radiative Transfer

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208

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The ExoMol database ( www.exomol.com ) provides molecular data for spectroscopic studies of hot atmospheres. While the data are intended for studies of exoplanets and other astronomical bodies, the dataset is widely applicable. The basic form of the database is extensive line lists; these are supplemented with partition functions, state lifetimes, cooling functions, Landé g-factors, temperature-dependent cross sections, opacities, pressure broadening parameters, k -coefficients and dipoles. This paper presents the latest release of the database which has been expanded to consider 80 molecules and 190 isotopologues totaling over 700 billion transitions. While the spectroscopic data are concentrated at infrared and visible wavelengths, ultraviolet transitions are being increasingly considered in response to requests from observers. The core of the database comes from the ExoMol project which primarily uses theoretical methods, albeit usually fine-tuned to reproduce laboratory spectra, to generate very extensive line lists for studies of hot bodies. The data have recently been supplemented by line lists derived from direct laboratory observations, albeit usually with the use of ab initio transition intensities. A major push in the new release is towards accurate characterisation of transition frequencies for use in high resolution studies of exoplanets and other bodies.

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Section: H 2 O Papers XIX and Xxxmentioning

confidence: 99%

The 2020 release of the ExoMol database: Molecular line lists for exoplanet and other hot atmospheres

Tennyson

Yurchenko

Al-Refaie

et al. 2020

Journal of Quantitative Spectroscopy and Radiative Transfer

Self Cite

208

161

View full text Add to dashboard Cite

show abstract

“…The red and blue triangles highlight the quadrupole transitions experimentally measured in this work by FTS and in Ref. [20] by CRDS, respectively.…”

Section: Figmentioning

confidence: 64%

“…Overview of the absorption line list of H2 16 O at 296 K. The calculated electric-quadrupole spectrum [20] (wine circles) is superimposed to the calculated electric-dipole spectrum (grey circles). The red and blue triangles highlight the quadrupole transitions experimentally measured in this work by FTS and in Ref.…”

Section: Figmentioning

confidence: 99%

“…While usual absorption line lists of polyatomic molecules include very weak E1 lines (generally computed), the absence of quadrupole transitions questioned their completeness. In a recent work, some of us reported the first detection of electric-quadrupole transitions in water vapor by very high sensitivity cavity ring down spectroscopy (CRDS) near 1.3 µm [20]. The detection of E2 lines with intensity largely above the dipole transitions intensity cut-off (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [20], the detection of water E2 lines relied on high accuracy calculations of the H2 16 O E2 spectrum. Fig.…”

Section: Introductionmentioning

confidence: 99%

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