Relève étoile Louis-Berlinguet 
August 2018

Marie-Eve Desrochers

MA student in Physics
Université de Montréal

Award-winning publication: Banyan. X. Discovery of a Wide, Low-gravity L-type Companion to a Fast-rotating M3 Dwarf

Published in: The Astrophysical Journal


Marie-Eve Desrochers discovered a brown dwarf whose mass is estimated to be 30 times that of Jupiter and which takes over 19 000 years to orbit around a star that may have formed recently. Observations on the main star indicate that it is actually made up of two stars located close together. The discovery of this distant sister star suggests that it was partially ejected from the system that emerged some tens of millions of years ago due to gravitational interaction. The type of object that was revealed is relatively rare, and its addition to the literature serves to broaden the samples used to study the mechanisms involved in the formation, interaction, migration and evolution of stars, brown dwarfs and planets. The sighting of this particular star system also leads to a reconsideration of our own solar system, which is becoming less and less the norm given the diversity of the systems in our galaxy.