Vivien Parmentier: Publications

Mineral cloud and hydrocarbon haze particles in the atmosphere of the hot Jupiter JWST target WASP-43b

Astronomy & Astrophysics EDP Sciences 641 (2020) A178-A178

Authors:

Ch Helling, Y Kawashima, V Graham, D Samra, KL Chubb, M Min, LBFM Waters, V Parmentier

Abstract:

Context. Having a short orbital period and being tidally locked makes WASP-43b an ideal candidate for the James Webb Space Telescope (JWST) phase curve measurements. Phase curve observations of an entire orbit will enable the mapping of the atmospheric structure across the planet, with different wavelengths of observation allowing different atmospheric depths to be seen. Aims. We provide insight into the details of the clouds that may form on WASP-43b and their impact on the remaining gas phase, in order to prepare the forthcoming interpretation of the JWST and follow-up data. Methods. We follow a hierarchical modelling strategy. We utilise 3D GCM results as input for a kinetic, non-equilibrium model for mineral cloud particles and for a kinetic model to study a photochemically-driven hydrocarbon haze component. Results. Mineral condensation seeds form throughout the atmosphere of WASP-43b. This is in stark contrast to the ultra-hot Jupiters, such as WASP-18b and HAT-P-7b. The dayside is not cloud free but it is loaded with few yet large mineral cloud particles in addition to hydrocarbon haze particles of a comparable abundance. Photochemically driven hydrocarbon haze appears on the dayside, but it does not contribute to the cloud formation on the nightside. The geometrical cloud extension differs across the globe due to the changing thermodynamic conditions. Day and night differ by 6000 km in pressure scale height. As reported for other planets, the C/O is not constant throughout the atmosphere and varies between 0.74 and 0.3. The mean molecular weight is approximately constant in a H2-dominated WASP-43b atmosphere because of the moderate day/night-temperature differences compared to the super-hot Jupiters. Conclusions. WASP-43b is expected to be fully covered in clouds which are not homogeneously distributed throughout the atmosphere. The dayside and the terminator clouds are a combination of mineral particles of locally varying size and composition as well as of hydrocarbon hazes. The optical depth of hydrocarbon hazes is considerably lower than that of mineral cloud particles such that a wavelength-dependent radius measurement of WASP-43b would be determined by the mineral cloud particles but not by hazes.

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A transition between the hot and the ultra-hot Jupiter atmospheres

Astronomy & Astrophysics EDP Sciences 639 (2020) a36

Authors:

Claire Baxter, Jean-Michel Désert, Vivien Parmentier, Mike Line, Jonathan Fortney, Jacob Arcangeli, Jacob L Bean, Kamen O Todorov, Megan Mansfield

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Strong biases in retrieved atmospheric composition caused by day–night chemical heterogeneities

Astronomy & Astrophysics EDP Sciences 636 (2020) a66

Authors:

William Pluriel, Tiziano Zingales, Jérémy Leconte, Vivien Parmentier

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Understanding the atmospheric properties and chemical composition of the ultra-hot Jupiter HAT-P-7b

Astronomy & Astrophysics EDP Sciences 635 (2020) a31

Authors:

K Molaverdikhani, Ch Helling, BWP Lew, RJ MacDonald, D Samra, N Iro, P Woitke, V Parmentier

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Global Chemistry and Thermal Structure Models for the Hot Jupiter WASP-43b and Predictions for JWST

The Astrophysical Journal American Astronomical Society 890:2 (2020) 176

Authors:

Olivia Venot, Vivien Parmentier, Jasmina Blecic, Patricio E Cubillos, Ingo P Waldmann, Quentin Changeat, Julianne I Moses, Pascal Tremblin, Nicolas Crouzet, Peter Gao, Diana Powell, Pierre-Olivier Lagage, Ian Dobbs-Dixon, Maria E Steinrueck, Laura Kreidberg, Natalie Batalha, Jacob L Bean, Kevin B Stevenson, Sarah Casewell, Ludmila Carone

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Vivien Parmentier

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Mineral cloud and hydrocarbon haze particles in the atmosphere of the hot Jupiter JWST target WASP-43b

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Abstract:

A transition between the hot and the ultra-hot Jupiter atmospheres

Authors:

Strong biases in retrieved atmospheric composition caused by day–night chemical heterogeneities

Authors:

Understanding the atmospheric properties and chemical composition of the ultra-hot Jupiter HAT-P-7b

Authors:

Global Chemistry and Thermal Structure Models for the Hot Jupiter WASP-43b and Predictions for JWST

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Mineral cloud and hydrocarbon haze particles in the atmosphere of the hot Jupiter JWST target WASP-43b

Authors:

Abstract:

A transition between the hot and the ultra-hot Jupiter atmospheres

Authors:

Strong biases in retrieved atmospheric composition caused by day–night chemical heterogeneities

Authors:

Understanding the atmospheric properties and chemical composition of the ultra-hot Jupiter HAT-P-7b

Authors:

Global Chemistry and Thermal Structure Models for the Hot Jupiter WASP-43b and Predictions for JWST

Authors: