2022
DOI: 10.1051/0004-6361/202142400
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The atmosphere and architecture of WASP-189 b probed by its CHEOPS phase curve

Abstract: Context. Gas giants orbiting close to hot and massive early-type stars can reach dayside temperatures that are comparable to those of the coldest stars. These ‘ultra-hot Jupiters’ have atmospheres made of ions and atomic species from molecular dissociation and feature strong day-to-night temperature gradients. Photometric observations at different orbital phases provide insights on the planet’s atmospheric properties. Aims. We aim to analyse the photometric observations of WASP-189 acquired with the Characteri… Show more

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Cited by 34 publications
(13 citation statements)
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“…For the stellar incident flux in the correlated-k radiativetransfer module, we use PHOENIX stellar atmosphere models (Allard et al 2012) interpolated to the properties of WASP-121 (T eff = 6460.0 K, [Fe/H] = 0.13, log g = 3.9) and WASP-189 (Deline et al (2022): T eff = 8000 K, [Fe/H] = 0.29, log g = 3.9) using pysnphot (STScI Development Team 2013).…”
Section: Gcm Modellingmentioning
confidence: 99%
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“…For the stellar incident flux in the correlated-k radiativetransfer module, we use PHOENIX stellar atmosphere models (Allard et al 2012) interpolated to the properties of WASP-121 (T eff = 6460.0 K, [Fe/H] = 0.13, log g = 3.9) and WASP-189 (Deline et al (2022): T eff = 8000 K, [Fe/H] = 0.29, log g = 3.9) using pysnphot (STScI Development Team 2013).…”
Section: Gcm Modellingmentioning
confidence: 99%
“…However, the K p -V sys signal from each species was different, suggesting chemical inhomogeneity in the atmosphere. Lendl et al (2020) and Deline et al (2022) present CHEOPS pho-tometric data of WASP-189b including an optical phase curve.…”
Section: Introductionmentioning
confidence: 99%
“…As discussed in previous analyses (e.g. Deline et al 2022;Hooton et al 2022;Wilson et al 2022), CHEOPS photometry is affected by variable contamination from other stars in the field of view. The variability of this contamination is due to the fact that the Point Spread Function (PSF) of the stars is not circular, and the overlap with the target PSF depends on the roll angle of the telescope (Benz et al 2021).…”
Section: Cheops Light Curvesmentioning
confidence: 84%
“…One of the main themes of its science program is the characterization of exoplanet atmospheres (Benz et al 2021). This consists of observations of secondary eclipses of hot Jupiters (e.g., Lendl et al 2020;Hooton et al 2022) across a wide range of temperatures and planetary surface gravities, full or partial phase curves of the most compelling targets (e.g., Deline et al 2022), and detailed observations of ultra-hot super-Earths (e.g., Morris et al 2021).…”
Section: Introductionmentioning
confidence: 99%
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