warpfitterFits warp profiles to velocity residual maps of protoplanetary discs. Grids molecular-line velocity residuals onto polar coordinates, decomposes them trigonometrically to isolate the warp signal, and applies Gaussian-process smoothing (Matérn kernel) to produce radial tilt-angle profiles with uncertainty envelopes. Used to show that large-scale kinematic structures in exoALMA discs are consistent with moderate warping rather than embedded planets.
Paper: Winter et al. 2025, ApJL 990, L10 — “exoALMA. XVIII. Interpreting Large-scale Kinematic Structures as Moderate Warping”
excursion_BHLAn excursion-set model for Bondi–Hoyle–Lyttleton (BHL) accretion onto planet-forming discs. Computes star-forming-region trajectories through galactic density and velocity fields, models gravitational collapse and cloud formation, and builds a statistical database of disc infall histories. Used to demonstrate that galactic-scale interstellar turbulence regulates disc replenishment and, in turn, planet formation efficiency across the Galaxy.
Paper: Winter et al. 2024, ApJL 972, L9 — “Planet Formation Regulated by Galactic-scale Interstellar Turbulence”
starclustergenGenerates initial conditions for N-body star cluster simulations and interfaces with the NBODY6++ code. Used to model the dynamical evolution of young stellar clusters and quantify star–disc encounter rates in realistic cluster environments, including the Taurus star-forming region.
Paper: Winter et al. 2024, A&A 691, A43 — “Running with the bulls: The frequency of star–disc encounters in the Taurus star-forming region”