Journal article
Molecular cross-sections for high-resolution spectroscopy of super-Earths, warm Neptunes, and hot Jupiters
- 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, 3.1MB, Terms of use)
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- Publisher copy:
- 10.1093/mnras/staa981
Authors
- Publisher:
- Oxford University Press
- Journal:
- Monthly Notices of the Royal Astronomical Society More from this journal
- Volume:
- 495
- Issue:
- 1
- Pages:
- 224-237
- Publication date:
- 2020-04-23
- Acceptance date:
- 2020-04-01
- DOI:
- EISSN:
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1365-2966
- ISSN:
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0035-8711
- Language:
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English
- Keywords:
- Pubs id:
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1137440
- Local pid:
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pubs:1137440
- Deposit date:
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2020-10-13
Terms of use
- Copyright holder:
- Gandhi, S et al.
- Copyright date:
- 2020
- Rights statement:
- © 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model.
- Notes:
- This is the publisher's version of the article. The final version is available online from Oxford University Press at: https://doi.org/10.1093/mnras/staa981
- Licence:
- Other
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