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My main research topics concern the solar corona and the Sun-Earth relationships. A large part of my past work concerns the heating of the corona: the solar corona is indeed heated to millions of degrees, and understanding the processes implied in this phenomenon represents one of the most important challenges of solar physics; there are also implications on the physics of the stars in general and for the understanding of the sometimes tumultuous relationships between the Sun and the Earth, especially during solar storms. Another part of my work concerns more specifically the solar wind, which is the extension of the corona to the Earth and the other planets. The solar wind and corona, both highly dynamic and structured by the magnetic field, are also a natural laboratory for the study of plasmas and turbulence. I am especially interested in these objects and topics:

• Magnetic loops of the solar corona
  • Heating mechanisms, especially including turbulence and small space and time scales, statistics of this heating, profiles of the heating along loops; observational characterization of statistics of heating and turbulence; connection with solar eruptions and space weather.
  • Coupling between these heating mechanisms and the cooling mechanisms, including radiation; production of spectroscopic observables; research of spectroscopic signatures of the coronal mechanisms; comparison with observations.
• Open regions of the corona and the solar wind: heating mechanisms and acceleration of the wind, especially including turbulence; anisotropy of MHD turbulence, and Hall-MHD turbulence in the interplanetary medium.
• Applications of this work to other astrophysical problems (stellar physics, interstellar medium...) and to theory of turbulence.