Speaker
Delphine Hypolite
(Research Institute in Astrophysics and Planetology (IRAP), Toulouse)
Description
Aims: We investigate the shape of the rotation profile of radiative stellar envelopes
undergoing gravitational contraction to obtain a better understanding of the dynamics
of such objects.
Methods: We construct a model of a rotating core absorbing a baroclinic envelope
enclosed in an undeformable spherical shell and solve the hydrodynamic equations
using the Boussinesq approximation.
Results: For small Ekman and Prandtl numbers, we are able to derive an analytical
solution of the azimuthal velocity and provide a criterion to determine which one of
the two flows, the baroclinic one or the one induced by mass contraction, dominates
the dynamic of the envelope.
Primary author
Delphine Hypolite
(Research Institute in Astrophysics and Planetology (IRAP), Toulouse)
