2021
DOI: 10.1007/s10686-021-09794-w
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Disentangling atmospheric compositions of K2-18 b with next generation facilities

Abstract: Recent analysis of the planet K2-18 b has shown the presence of water vapour in its atmosphere. While the H2O detection is significant, the Hubble Space Telescope (HST) WFC3 spectrum suggests three possible solutions of very different nature which can equally match the data. The three solutions are a primary cloudy atmosphere with traces of water vapour (cloudy sub-Neptune), a secondary atmosphere with a substantial amount (up to 50% Volume Mixing Ratio) of H2O (icy/water world) and/or an undetectable gas such… Show more

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Cited by 8 publications
(3 citation statements)
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References 114 publications
(139 reference statements)
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“…Clouds are omnipresent in planetary, exoplanetary, and brown dwarf atmospheres (see, e.g., review by Helling 2023a) and have often been detected in exoplanet atmospheric data (Kreidberg et al 2014;Sing et al 2016;Stevenson 2016;Tsiaras et al 2018). Their presence imposes additional complexity and uncertainties in the interpretation of exoplanet atmospheric spectra (e.g., Mai & Line 2019;Tsiaras et al 2019;Changeat et al 2022b).…”
Section: Introductionmentioning
confidence: 99%
“…Clouds are omnipresent in planetary, exoplanetary, and brown dwarf atmospheres (see, e.g., review by Helling 2023a) and have often been detected in exoplanet atmospheric data (Kreidberg et al 2014;Sing et al 2016;Stevenson 2016;Tsiaras et al 2018). Their presence imposes additional complexity and uncertainties in the interpretation of exoplanet atmospheric spectra (e.g., Mai & Line 2019;Tsiaras et al 2019;Changeat et al 2022b).…”
Section: Introductionmentioning
confidence: 99%
“…For example, Changeat et al ( 2020 ) have showed the possibility of reco v ering chemical trends in a large sample of hydrogen-rich planets observed by Ariel. Other studies (Bourgalais et al 2020 ;Changeat et al 2021a ) have focused on the capability of Ariel to observe lowmass planets. Due to the sample nature of the mission, which plans to observe spectroscopically about 1000 exoplanet atmospheres, significant work has also been achieved in the development of fast and reliable techniques to reco v er information from observed spectra, adopting for instance machine-learning techniques (Yip et al 2021 ;Changeat & Hou Yip 2022 ) or other statistical methods (Mugnai et al 2021 ).…”
mentioning
confidence: 99%
“…Clouds are omnipresent in planetary, exoplanetary and brown dwarf atmospheres (see e.g., review by Helling 2022) and have often been detected in exoplanet atmospheric data (Kreidberg et al 2014;Sing et al 2016;Stevenson 2016;Tsiaras et al 2018). Their presence imposes additional complexity and uncertainties in the interpretation of exoplanet atmospheric spectra (e.g., Changeat et al 2021b;Tsiaras et al 2019;Mai & Line 2019).…”
mentioning
confidence: 99%