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Aurélien HEES


I am currently performing a post-doctoral research stay at NASA Jet Propulsion Laboratory with a Belgian American Educational Foundation (BAEF) fellowship. I got my PhD in Physics from UCLouvain – Royal Observatory of Belgium in collaboration with the department “Système de Références Temps-Espace” (SYRTE) from Paris Observatory. I am interested in the study of the gravitation theory at a fundamental level and the possibility to test the gravitation theory using Solar System and cosmological olbservations. This includes the study of alternative theories of gravity at the theoretical level, the high accuracy modeling of observations, numerical simulations and data analysis.



  • Gravitation theory at fundamental level: General Relativity and its extensions (in particular the ones developed in the context of Dark Energy)
  • Effects of the gravitation theory on Solar System observations: high accuracy modeling of space observations (spacecraft tracking and astrometric observations)
  • Tests of the gravitation theory using Solar System observations: spacecraft tracking, ephemerides, astrometry, …
  • Tests of gravitation theory at cosmological scales and study of Dark Energy



  • 2012: PhD in Physics, UCLouvain, Belgium
    Thesis: “Signature of observables in alternative theories of gravitation”
    Supervisors: V. Dehant (Royal Observatory of Belgium) and P. Wolf (Paris Observatory)
  • 2008: Engineer in Applied Mathematics from UCLouvain, Belgium
  • 2007: Engineer from Ecole Centrale de Paris, France
  • 2006: Licensed in Fundamental Physics, Université d’Orsay-Paris XI, France



  • 2013: BAEF fellow for a postdoc at NASA-Jet Propulsion Laboratory, California Institute of Technology
  • 2012: Research assistant in the mathematic department from University of Namur (naXys)
  • 2008-2012: fellow of the FRS-FNRS (Belgian National Funds for Scientific Research) for a thesis at UCLouvain-Royal Observatory of Belgium in collaboration with the Paris Observatory (SYRTE)
  • 2006: CERN Summer Student, Geneva, Swizerland



  • Gustave Boël – Sofina fellowship of the Belgian American Educational Foundation, 2012
  • FRS-FNRS fellowship, 2008
  • Graduated with “Highest honors”, UCLouvain, 2008
  • Graduated with “Highest honors”, Ecole Centrale de Paris, 2007




  • A. Hees, B. Lamine, S. Reynaud, M.T. Jaekel, C. Le Poncin-Lafitte, A. Füzfa, J.-M. Courty, V. Dehant, P. Wolf, Radioscience simulations in General Relativity and in alternative theories of gravity, Class. Quantum Grav. 29 235027, 2012
  • A. Hees, A. Füzfa, Cosmological and Solar System constraints on chameleon mechanism, Phys. Rev. D 85, 103005, 2012
  • J.P. Bruneton, M. Rinaldi, A. Kanfon, A. Hees, S. Schlögel, A. Füzfa, Fab Four : When John and George play gravitation and cosmology, Advances in Astronomy, 2012, 430694, 2012
  • L. Bergamin, P. Delva, A. Hees, Vibrating systems in Schwarzschild spacetime : toward new experiments in gravitation ?, Class. Quantum Grav. 26 185006, 2009
  • A. Hees, A. Füzfa, Can the chameleon mechanism explain cosmic acceleration while satisfying Solar System constraints ?, proceedings of the 13th Marcell Grossman Meeting in general relativity, 2013
  • A. Hees, S. Bertone, C. Le Poncin-Lafitte, Frequency shift up to the second Post-Minkowskian approximation, proceedings of the Annual Meeting of the SF2A, 2012
  • A. Hees, P. Wolf, B. Lamine, S. Reynaud, M.T. Jaekel, C. Le Poncin-Lafitte, V. Lainey, V. Dehant, Testing gravitation in the Solar System with radioscience experiments, proceedings of the Annual Meeting of the SF2A, 2011



Aurélien Hees

NASA – Jet Propulsion Laboratory, California Institute of Technology

Mail stop: 125-109

4800 Oak Grove Dr

Pasadena CA 91109 – USA


Phone: +1 818 354 4381

E-mail : Aurelien.D.Hees at