A subsolar oxygen abundance or a radiative region deep in Jupiter revealed by thermochemical modelling
CAVALIÉ, T.
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
ASP 2023
Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
ASP 2023
Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
CAVALIÉ, T.
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
ASP 2023
Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
< Reduce
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
ASP 2023
Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics [LESIA]
Language
en
Document de travail - Pré-publication
This item was published in
2023-06p. 678-683
English Abstract
Jupiter’s deep abundances help to constrain the formation history of the planet and the environment of the protoplanetary nebula. Juno recently measured Jupiter’s deep oxygen abundance near the equator to be 2.2+3.9−2.1 ...Read more >
Jupiter’s deep abundances help to constrain the formation history of the planet and the environment of the protoplanetary nebula. Juno recently measured Jupiter’s deep oxygen abundance near the equator to be 2.2+3.9−2.1 times the protosolar value (2σ uncertainties). Even if the nominal value is supersolar, subsolar abundances cannot be ruled out. Here we use a state-of-the-art one-dimensional thermochemical and diffusion model with updated chemistry to constrain the deep oxygen abundance with upper tropospheric CO observations. We find a value of 0.3+0.5−0.2 times the protosolar value. This result suggests that Jupiter could have a carbon-rich envelope that accreted in a region where the protosolar nebula was depleted in water. However, our model can also reproduce a solar/supersolar water abundance if vertical mixing is reduced in a radiative layer where the deep oxygen abundance is obtained. More precise measurements of the deep water abundance are needed to discriminate between these two scenarios and understand Jupiter’s internal structure and evolution.Read less <
English Keywords
Atmospheric chemistry
Giant planets
Origin
Hal imported