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6 papers · 1 filter
The shape of convection in 2D and 3D global simulations of stellar interiors
M. -G. Dethero, J. Pratt, D. G. Vlaykov +5
Theoretical descriptions of convective overshooting often rely on a one-dimensional parameterization of the flow called the filling factor for convection. Several definitions of th…
Effects of stratification on overshooting and waves atop the convective core of main-sequence stars
Adrien Morison, Arthur Le Saux, Isabelle Baraffe +5
As a massive star evolves along the main sequence, its core contracts, leaving behind a stable stratification in helium. We simulate 2D convection in the core at three different st…
Variational estimation of the large scale time dependent meridional circulation in the Sun: proofs of concept with a solar mean field dynamo model
Ching Pui Hung, Allan Sacha Brun, Alexandre Fournier +3
We present in this work the development of a solar data assimilation method based on an axisymmetric mean field dynamo model and magnetic surface data, our mid-term goal is to pred…
Estimating the deep solar meridional circulation using magnetic observations and a dynamo model: a variational approach
Ching Pui Hung, Laurène Jouve, Allan Sacha Brun +2
We show how magnetic observations of the Sun can be used in conjunction with an axisymmetric flux-transport solar dynamo model in order to estimate the large-scale meridional circu…
Elliptical instability in hot Jupiter systems
David Cébron, Michael Le Bars, Patrice Le Gal +3
Several studies have already considered the influence of tides on the evolution of systems composed of a star and a close-in companion to tentatively explain different observations…
Assimilating data into an αω dynamo model of the sun: A variational approach
Laurene Jouve, Allan Sacha Brun, Olivier Talagrand
We have developed a variational data assimilation technique for the Sun using a toy αΩ dynamo model. The purpose of this work is to apply modern data assimilation techniques to sol…