Astrophysical fluid bodies that orbit close to one another induce tidal distortions and flows
that are subject to dissipative processes. The spin and orbital motions undergo a coupled …

Because of gravitational interactions with their companions, the rotational dynamics of
planets and stars involve periodic perturbations of their shape, the direction of their …

The origin of lunar magnetic anomalies,,,, remains unresolved after their discovery more
than four decades ago. A commonly invoked hypothesis is that the Moon might once have …

The combination of elliptical deformation of streamlines and vorticity can lead to the
destabilization of any rotating flow via the elliptical instability. Such a mechanism has been …

Planets and satellites can undergo physical librations, which consist of forced periodic
variations in their rotation rate induced by gravitational interactions with nearby bodies. This …

Tidally distorted rotating stars and gaseous planets are subject to a well-known linear fluid
instability–the elliptical instability. It has been proposed that this instability might drive …

Context. The presence of celestial companions means that any planet may be subject to
three kinds of harmonic mechanical forcing: tides, precession/nutation, and libration. These …

Large-scale planetary or stellar magnetic fields generated by a dynamo effect are mostly
attributed to flows forced by buoyancy forces in electrically conducting fluid layers. However …

Stellar magnetism plays an important role in stellar evolution theory. Approximatively 10 per
cent of observed main sequence (MS) and pre-main-sequence (PMS) radiative stars exhibit …

I present results from the first global hydrodynamical simulations of the elliptical instability in
a tidally deformed gaseous planet (or star) with a free surface. The elliptical instability is …