These lecture notes are based on a tutorial given in 2017 at a plasma physics winter school
in Les Houches. Their aim is to provide a self-contained graduate-student level introduction …

Using numerical relativity simulations with a subgrid dynamo prescription to generate strong
initial magnetic fields, we investigate the possibility of launching a jet-like outflow from the …

Jetted astrophysical phenomena with black hole engines, including binary mergers, jetted
tidal disruption events, and X-ray binaries, require a large-scale vertical magnetic field for …

ABSTRACT A global picture of the evolution of protoplanetary disks (PPDs) is key to
understanding almost every aspect of planet formation, where standard α-disk models have …

We investigate the impact of a mean field model for the α Ω dynamo potentially active in the
postmerger phase of a binary neutron star coalescence. We do so by deriving equations for …

Strongly magnetized accretion discs around black holes have attractive features that may
explain enigmatic aspects of X-ray binary behaviour. The structure and evolution of these …

Large-scale vertical magnetic fields are believed to play a key role in the evolution of
protoplanetary discs. Associated with non-ideal effects, such as ambipolar diffusion, they are …

Protoplanetary discs are made of gas and dust orbiting a young star. They are also the birth
place of planetary systems, which motivates a large amount of observational and theoretical …

The assembly and architecture of planetary systems strongly depend on the physical
processes governing the evolution and dispersal of protoplanetary disks. Since Protostars …

Context. Magnetohydrodynamic (MHD) turbulence plays a crucial role in the dust dynamics
of protoplanetary discs. It affects planet formation, vertical settling, and is one possible origin …