H 2 , He, and CO 2 line-broadening coefficients, pressure shifts and temperature-dependence exponents for the HITRAN database. Part 1: SO 2 , NH 3 , HF, HCl, OCS and C 2 H 2

Wilzewski, Jonas; Gordon, Iouli E.; Kochanov, Roman V.; Hill, Christian; Rothman, Laurence S.

doi:10.1016/j.jqsrt.2015.09.003

Cited by 74 publications

(59 citation statements)

References 124 publications

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“…With that being said, Vispoel & Lepère (2019) recently studied CH 4 lines broadened by N 2 but did not observe a large discrepancy between a single power law and double power law up to 700 K. Another consideration for line broadening of CH 4 is by "planetary" gases, including CO 2 , H 2 , He and H 2 O. As previously discussed, HITRAN provides line broadening by CO 2 , H 2 , He and H 2 O (Wilzewski et al 2016;Tan et al 2019) for several gases. But for CH 4 , broadening by H 2 O is the only additional perturber currently available (Tan et al 2019).…”

Section: Broadening Parameters and Hitemp Formatmentioning

confidence: 94%

“…HITRAN2016 (Gordon et al 2017) is the most recent version of the database, and is freely available at HITRANonline 1 . Recent efforts have been undertaken to expand the use of HITRAN towards planetary atmospheres, with the inclusion of additional broadening species (Wilzewski et al 2016;Tan et al 2019). However, the CH 4 line list in HITRAN2016 is un-1 https://hitran.org suitable for spectroscopy at high temperatures due to issues of incompleteness.…”

Section: The Hitran and Hitemp Databasesmentioning

confidence: 99%

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An Accurate, Extensive, and Practical Line List of Methane for the HITEMP Database

Hargreaves¹,

Gordon²,

Rey

et al. 2020

ApJS

Self Cite

138

102

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A methane line list for the HITEMP spectroscopic database, covering 0-13,400 cm −1 (>746 nm), is presented. To create this compilation, ab initio line lists of 12 CH 4 from Rey et al. (2017) ApJ, 847, 105 (provided at separate temperatures in the TheoReTS information system), are now combined with HITRAN2016 methane data to produce a single line list suitable for high-temperature line-byline calculations up to 2000 K. An effective-temperature interpolation model was created in order to represent continuum-like features at any temperature of interest. This model is advantageous to previously-used approaches that employ so-called "super-lines", which are suitable only at a given temperature and require separate line lists for different temperatures. The resultant HITEMP line list contains ∼32 million lines and is significantly more flexible than alternative line lists of methane, while accuracy required for astrophysical or combustion applications is retained. Comparisons against experimental observations of methane absorption at high temperatures have been used to demonstrate the accuracy of the new work. The line list includes both strong lines and quasi-continuum features and is provided in the common user-friendly HITRAN/HITEMP format, making it the most practical methane line list for radiative transfer modeling at high-temperature conditions.

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Section: Broadening Parameters and Hitemp Formatmentioning

confidence: 94%

Section: The Hitran and Hitemp Databasesmentioning

confidence: 99%

An Accurate, Extensive, and Practical Line List of Methane for the HITEMP Database

Hargreaves¹,

Gordon²,

Rey

et al. 2020

ApJS

Self Cite

138

102

View full text Add to dashboard Cite

show abstract

“…The HITRAN data are extremely successful at modeling spectra in the temperature regime of the terrestrial atmosphere. Recent updates have expanded HITRAN to include additional broadening parameters for H 2 , He, and CO 2 of relevance to the atmospheres of Jupiter, Saturn and Mars [19]. However, application of HITRAN to environments with elevated temperatures can lead to an incomplete model.…”

Section: The Hitran and Hitemp Databasesmentioning

confidence: 99%

Spectroscopic line parameters of NO, NO2, and N2O for the HITEMP database

Hargreaves

Gordon

Rothman

et al. 2019

Journal of Quantitative Spectroscopy and Radiative Transfer

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This work describes the update of NO along with the incorporation of NO 2 and N 2 O to the HITEMP database. Where appropriate, the HITRAN line lists for the same molecules have also been updated. This work brings the current number of molecules provided by HITEMP to seven. The initial line lists originating from ab initio and semi-empirical methods for each molecule have been carefully validated against available observations and, where necessary, adjustments have been made to match observations. We anticipate this work will be applied to a variety of high-temperature environments including astronomical applications, combustion monitoring, and non-local thermodynamic equilibrium conditions.

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“…T > 400 K) and are not important at Jovian temperatures. Hence, we initially reduced the number of lines to a more manageable level by using the lower state energies and partition function to used by Wilzewski et al (2015). The He-broadening widths were taken from Wilzewski et al (2015), who used the unpublished polynomial fit by Linda R. Brown up to J = 9 and a value of 0.0282 cm −1 atm −1 for higher J values.…”

Section: New Exomol Ammonia Line Datamentioning

confidence: 99%

“…Hence, we initially reduced the number of lines to a more manageable level by using the lower state energies and partition function to used by Wilzewski et al (2015). The He-broadening widths were taken from Wilzewski et al (2015), who used the unpublished polynomial fit by Linda R. Brown up to J = 9 and a value of 0.0282 cm −1 atm −1 for higher J values. The self-broadening coefficients were also taken from a polynomial fit by Nemtchinov et al (2004) up to J = 8, and a value of 0.5 cm −1 atm −1 assumed for higher J-values, as given in HITRAN2016 (Gordon et al 2017).…”

Section: New Exomol Ammonia Line Datamentioning

confidence: 99%

Analysis of gaseous ammonia (NH3) absorption in the visible spectrum of Jupiter - Update

Irwin

Bowles

Braude

et al. 2019

Icarus

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An analysis of currently available ammonia (NH 3 ) visible-to-near-infrared gas absorption data was recently undertaken by Irwin et al. (Icarus, 302 (2018) 426) to help interpret Very Large Telescope (VLT) MUSE observations of Jupiter from 0.48 -0.93 µm, made in support of the NASA/Juno mission. Since this analysis a newly revised set of ammonia line data, covering the previously poorly constrained range 0.5 -0.833 µm, has been released by the ExoMol project, "C2018" , which demonstrates significant advantages over previously available data sets, and providing for the first time complete line data for the previously poorly constrained 5520-and 6475-Å bands of NH 3 . In this paper we compare spectra calculated using the ExoMol-C2018 data set with spectra calculated from previous sources to demonstrate its advantages. We conclude that at the present time the ExoMol-C2018 dataset provides the most reliable ammonia absorption source for analysing low-to medium-resolution spectra of Jupiter in the visible/near-IR spectral range, but note that the data are less able to model high-resolution spectra owing to small, but significant inaccuracies in the line wavenumber estimates. This work is of significance not only for solar system planetary physics, but for future proposed observations of Jupiter-like planets orbiting other stars, such as with NASA's planned Wide-Field Infrared Survey Telescope (WFIRST). Subject headings: planets and satellites: atmospheres -planets and satellites: individual (Jupiter) Yurchenko 2012; Tennyson et al. 2016). The new line list covers an extended wavelength

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H 2 , He, and CO 2 line-broadening coefficients, pressure shifts and temperature-dependence exponents for the HITRAN database. Part 1: SO 2 , NH 3 , HF, HCl, OCS and C 2 H 2

Cited by 74 publications

References 124 publications

An Accurate, Extensive, and Practical Line List of Methane for the HITEMP Database

An Accurate, Extensive, and Practical Line List of Methane for the HITEMP Database

Spectroscopic line parameters of NO, NO2, and N2O for the HITEMP database

Analysis of gaseous ammonia (NH3) absorption in the visible spectrum of Jupiter - Update

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