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arXiv · 2510.23505

Unveiling stellar (and planetary) internal dynamics with the fully compressible MUSIC code

Arthur Le Saux·Isabelle Baraffe·Thomas Guillet·Jane Pratt·Tom Goffrey·Dimitar Vlaykov·Adrien Morison·Jack Morton·Maxime Stuck·Mary Geer Dethero·Nils de Vries
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Abstract

Multidimensional hydrodynamical simulations have transformed the study of stellar interiors over the past few decades. Most codes developed during that time use the anelastic approximation, which fixes the thermal structure of simulations and filters out sound waves. Many of them also use explicit time integration, which imposes severe constraints on the time step of the simulations. In this context, MUSIC is developed to overcome these limitations. Its main scientific objective is to improve the phenomenological approaches used in 1D stellar evolution codes to describe major hydrodynamical and MHD processes. Here, we review recent applications of the MUSIC code, that focus mainly on convection, convective boundary mixing and waves in stars that possess convective cores, shells and/or envelopes.

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Arthur Le Saux, Isabelle Baraffe, Thomas Guillet, Jane Pratt, Tom Goffrey, Dimitar Vlaykov, Adrien Morison, Jack Morton, Maxime Stuck, Mary Geer Dethero, Nils de Vries. 2025-10-27. Unveiling stellar (and planetary) internal dynamics with the fully compressible MUSIC code. https://arxiv.org/abs/2510.23505

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