Predicting the hypervelocity star population in Gaia

Understand

Hypervelocity stars (HVSs) are amongst the fastest objects in our Milky Way.

• These stars are predicted to come from the Galactic center (GC) and travel along unbound orbits across the Galaxy.
• In the coming years, the ESA satellite Gaia will provide the most complete and accurate catalogue of the Milky Way, with full astrometric parameters for more than $1$ billion stars.
• In this paper, we present the expected sample size and properties (mass, magnitude, spatial, velocity distributions) of HVSs in the Gaia stellar catalogue.