My research interest is on turbulence in astrophysics and cosmology. I use both high level mathematical tools and massive numerical simulations to study the properties of turbulence and discover new fundamental laws. The domains of application are diverse: solar wind plasma, supersonic interstellar medium, solar coronal heating, dynamo in stars and planets, and primordial gravitational waves. Magnetohydrodynamics (MHD) and general relativity are the main equations used to investigate these questions.

Solar wind plasma

The heliosphere is a huge magnetized bubble of about 100 AU containing the entire solar system and moving through the interstellar medium at a speed of about 30 km/s. The heliosphere is permeated by the solar... Read more

Weak MHD turbulence

Since the seminal papers of Iroshnikov and Kraichnan published in the 1960s, it is believed that incompressible MHD turbulence finds its origin in the stochastic collisions of counter-propagating MHD waves... Read more


The direct observation in 2016 of gravitational waves (GW) by the LIGO-Virgo collaboration, a century after their prediction by Albert Einstein, is certainly one of the most important events in astronomy of the last... Read more

Solar coronal heating

Observations of the solar atmosphere reveal a sharp increase of the temperature, from several thousands degrees in the photosphere (the solar surface) to several millions degrees in the corona. This amazing... Read more

Planetary dynamos

Dynamo is the main mechanism for the generation and maintenance of magnetic fields in stars, planets and exo-planetes. Observations, experiments and simulations reveal that rotation is one of the key factors that... Read more

Interstellar clouds

Compressible turbulence is much less studied than incompressible turbulence. One reason is that hydrodynamic turbulence is generally subsonic with turbulent Mach numbers smaller than one. Since most of... Read more