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Molecular cross sections for high resolution spectroscopy of super earths, warm Neptunes and hot Jupiters
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Gandhi, Siddharth, Brogi, Matteo, Yurchenko, Sergei N., Tennyson, Jonathan, Coles, Phillip A., Webb, Rebecca K., Birkby, Jayne L., Guilluy, Gloria, Hawker, George A., Madhusudhan, Nikku, Bonomo, Aldo S. and Sozzetti, Alessandro (2020) Molecular cross sections for high resolution spectroscopy of super earths, warm Neptunes and hot Jupiters. Monthly Notices of the Royal Astronomical Society, 495 (1). pp. 224-237. doi:10.1093/mnras/staa981 (In Press)
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Official URL: http://dx.doi.org/10.1093/mnras/staa981
Abstract
High-resolution spectroscopy (HRS) has been used to detect a number of species in the atmospheres of hot Jupiters. Key to such detections is accurately and precisely modelled spectra for cross-correlation against the R ≳ 20 000 observations. There is a need for the latest generation of opacities which form the basis for high signal-to-noise detections using such spectra. In this study we present and make publicly available cross-sections for six molecular species, H2O, CO, HCN, CH4, NH3, and CO2 using the latest line lists most suitable for low- and high-resolution spectroscopy. We focus on the infrared (0.95–5 μm) and between 500 and 1500 K where these species have strong spectral signatures. We generate these cross-sections on a grid of pressures and temperatures typical for the photospheres of super-Earth, warm Neptunes, and hot Jupiters using the latest H2 and He pressure broadening. We highlight the most prominent infrared spectral features by modelling three representative exoplanets, GJ 1214 b, GJ 3470 b, and HD 189733 b, which encompass a wide range in temperature, mass, and radii. In addition, we verify the line lists for H2O, CO, and HCN with previous high-resolution observations of hot Jupiters. However, we are unable to detect CH4 with our new cross-sections from HRS observations of HD 102195 b. These high-accuracy opacities are critical for atmospheric detections with HRS and will be continually updated as new data become available.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science > Physics | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Planets -- Atmospheres , Satellites -- Atmospheres, High resolution spectroscopy | ||||||||||||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||||||||||||
| Publisher: | Oxford University Press | ||||||||||||||||||
| ISSN: | 0035-8711 | ||||||||||||||||||
| Official Date: | June 2020 | ||||||||||||||||||
| Dates: |
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| Date of first compliant deposit: | 30 June 2020 | ||||||||||||||||||
| Volume: | 495 | ||||||||||||||||||
| Number: | 1 | ||||||||||||||||||
| Page Range: | pp. 224-237 | ||||||||||||||||||
| DOI: | 10.1093/mnras/staa981 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | In Press | ||||||||||||||||||
| Publisher Statement: | This is a pre-copyedited, author-produced version of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Siddharth Gandhi, Matteo Brogi, Sergei N Yurchenko, Jonathan Tennyson, Phillip A Coles, Rebecca K Webb, Jayne L Birkby, Gloria Guilluy, George A Hawker, Nikku Madhusudhan, Aldo S Bonomo, Alessandro Sozzetti, Molecular cross-sections for high-resolution spectroscopy of super-Earths, warm Neptunes, and hot Jupiters, Monthly Notices of the Royal Astronomical Society, Volume 495, Issue 1, June 2020, Pages 224–237 is available online at: http://dx.doi.org/10.1093/mnras/staa981 | ||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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