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18 mai 2018 Tout le mois

Ravit Helled (Zurich) - The fuzziness of Jupiter’s core

Vendredi 18 mai 11:00-12:00

Giant planets are thought to have cores in their deep interiors, and the division into a heavy-element core and hydrogen-helium envelope is applied in both formation and structure models. I will briefly discuss the standard model for giant planet formation, and will show that the primordial internal structure of giant planets depends on their growth history, in particular, the ratio of heavy element accretion to gas accretion.
I will present the expected primordial internal structure of Jupiter and show that its core might not be well-defined. I will also show that Jupiter’s deep interior is likely to have an inhomogeneous structure as suggested by new Juno data. Finally, I will discuss the importance of these results for analyzing the gravity data of the NASA Juno mission, and their effect on the characterization of giant exoplanets.

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