Gilles Chabrier is a French astrophysicist who is best known for his work on brown dwarfs.
He studied physics at the École normale supérieure (ENS).
Chabrier continues to lead one of the research groups at CRAL.
He is also a research director at the Centre national de la recherche scientifique (CNRS).
Before the discovery of brown dwarfs in 1995, Chabrier helped develop the theory of their structure in collaboration with Isabelle Baraffe, France Allard and Didier Saumon