New models of Jupiter and giant planet interiors in the context of Juno

Tuesday 3 July, 17:00

Through the observations of transiting planets and the first few ones directly imaged, our understanding of Hot Jupiter atmospheres has greatly increased in the past decade. Nevertheless, the inner structure of these planets remains vastly unknown. Constraining their interior would need observation of their magnetic or gravity field, which is a challenge for the astrophysics community.

In that regard, the best way to study Hot Jupiter interiors is through the comparison with Jupiter. Thanks to four decades of satellite observations and analytical studies, a global picture of the planet has been drawn, but we still don’t understand the structure of Jupiter precisely. The total mass of metals is not well known, including the mass of the core if there is any.

In this talk, I will present new models of Jupiter as constrained by the data from Juno.  I will show the degeneracy of interior structures from the sole observations of gravitational data, and discuss the impact on the mass of the core, its size and other relevant physical parameters. A particular emphasis will be made on how to construct physical models of the planet, and notably the possible presence of layered convection.

These new tight constraints on Jupiter interior structure will provide the basis for a better understanding of exoplanet inner mechanical and thermal profiles, composition and energy transport mechanism, providing key information to better handle their structure and evolution.

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