About me

I am a postdoctoral researcher at the Department of Astronomy and Theoretical Physics at Lund University. My main research interests are the dynamical evolution of planetary systems, from their formation to their observation. My main collaborators here are Anders Johansen and Melvyn B. Davies.

I completed my Ph.D. in June 2019 at the Ephemeris and Celestial Mechanics Institute (IMCCE) of the Paris Observatory under the supervision of Jacques Laskar and Gwenaël Boué. I mainly worked on the development of simple criteria to determine the stability of exoplanetary systems.

Research Interests

  • Celestial and planet dynamics
  • Stability of planetary systems
  • Planet formation
  • Statistics and architecture of planetary systems
  • Numerical integration methods
  • AMD-stability and the classification of planetary systems

    The AMD or Angular Momentum Deficit (AMD) is a quantity that measures the dynamical excitment of a planetary system. A large AMD means that planet orbit may cross, leading to the destruction of the planetary system. I used it to classify the exoplanetary systems into two categories: the AMD-stable ones that will remain stable over their lifetime because their AMD is too low to allow for collision and the AMD-unstable were the AMD alone cannot ensure the stability of the system and that should be studied in more details.

    An AMD-stability calculator is available on exoplanet.eu for selected systems. My works with J. Laskar and G. Boué on the AMD-stability are published in the articles:

  • AMD-stability and the classification of planetary systems, J. Laskar & A. Petit, A&A 2017
  • AMD-stability in the presence of first-order mean motion resonances , A. Petit, L. Laskar & G. Boué, A&A 2017
  • Hill stability in the AMD framework , A. Petit, L. Laskar & G. Boué, A&A 2018
    • Lund Observatory
    • Box 43
    • SE-221 00 Lund
    • Sweden