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The GAPS Programme at TNG XXXIX. Multiple molecular species in the atmosphere of the warm Giant Planet WASP-80 b unveiled at high resolution with GIANO-B*
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(2022) The GAPS Programme at TNG XXXIX. Multiple molecular species in the atmosphere of the warm Giant Planet WASP-80 b unveiled at high resolution with GIANO-B*. The Astronomical Journal, 164 (3). 101. doi:10.3847/1538-3881/ac80bf ISSN 1538-3881.
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Official URL: https://doi.org/10.3847/1538-3881/ac80bf
Abstract
Detections of molecules in the atmosphere of gas giant exoplanets allow us to investigate the physico-chemical properties of the atmospheres. Their inferred chemical composition is used as tracer of planet formation and evolution mechanisms. Currently, an increasing number of detections is showing a possible rich chemistry of the hotter gaseous planets, but whether this extends to cooler giants is still unknown. We observed four transits of WASP-80 b, a warm transiting giant planet orbiting a late-K dwarf star with the near-infrared GIANO-B spectrograph installed at the Telescopio Nazionale Galileo and performed high-resolution transmission spectroscopy analysis. We report the detection of several molecular species in its atmosphere. Combining the four nights and comparing our transmission spectrum to planetary atmosphere models containing the signature of individual molecules within the cross-correlation framework, we find the presence of H2O, CH4, NH3, and HCN with high significance, tentative detection of CO2, and inconclusive results for C2H2 and CO. A qualitative interpretation of these results, using physically motivated models, suggests an atmosphere consistent with solar composition and the presence of disequilibrium chemistry and we therefore recommend the inclusion of the latter in future modeling of sub-1000 K planets.
| 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, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||
| SWORD Depositor: | Library Publications Router | ||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Extrasolar planets , Extrasolar planets -- Atmopsheres, Extrasolar planets -- Detection, Astronomical photometry , Molecular spectroscopy | ||||||||||||||||||||||||
| Journal or Publication Title: | The Astronomical Journal | ||||||||||||||||||||||||
| Publisher: | The American Astronomical Society | ||||||||||||||||||||||||
| ISSN: | 1538-3881 | ||||||||||||||||||||||||
| Official Date: | 18 August 2022 | ||||||||||||||||||||||||
| Dates: |
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| Volume: | 164 | ||||||||||||||||||||||||
| Number: | 3 | ||||||||||||||||||||||||
| Article Number: | 101 | ||||||||||||||||||||||||
| DOI: | 10.3847/1538-3881/ac80bf | ||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||
| Reuse Statement (publisher, data, author rights): | ** From IOP Publishing via Jisc Publications Router ** History: received 03-05-2022; rev-recd 25-06-2022; accepted 11-07-2022; oa-requested 11-07-2022; epub 18-08-2022; open-access 18-08-2022; ppub 01-09-2022. ** Licence for this article: http://creativecommons.org/licenses/by/4.0/ | ||||||||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||
| Date of first compliant deposit: | 11 October 2022 | ||||||||||||||||||||||||
| Date of first compliant Open Access: | 11 October 2022 | ||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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