The dynamical memory of tidal stellar streams: Joint inference of the Galactic potential and the progenitor of GD-1 with flow matching
Researchers used Flow Matching and Simulation-Based Inference to jointly infer parameters of a disrupted stellar stream (GD-1) and the Milky Way's gravitational potential. The method learns a vector field to map stream phase-space data directly to posterior distributions, enabling efficient, single-shot inference that captures complex couplings between host structure and progenitor properties.