Composition gradients and convection in dense astrophysical objects: anti-diffusive dynamics in giant planets and white dwarfs

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• Andrew Cumming (McGill University)
• Tuesday 28 May 2024, 11:30-12:30
• Seminar Room 1, Newton Institute.

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ADI - Anti-diffusive dynamics: from sub-cellular to astrophysical scales

I will discuss two examples from astrophysics in which composition gradients and convection interact to give anti-diffusive dynamics: the evolving composition profile of Jupiter’s interior and crystallization-driven fingering convection in white dwarfs. They are motivated by recent observational results – the inferred density profile of Jupiter from the Juno mission, and new results on cooling white dwarfs from Gaia. For Jupiter, I will show results from Boussinesq simulations of penetrative convection and layer formation at Prandtl number

This talk is part of the Isaac Newton Institute Seminar Series series.

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