XMST II: The spatial and kinematic structure of Galactic OB associations in Gaia DR3

arXiv:2609.23515 · astro-ph.GA, astro-ph.IM · Submitted 2026-09-20 · Read on arXiv

astro-ph.GA, astro-ph.IM

Submitted: 2026-09-20

Updated: 2026-09-20

DOI: 10.5281/zenodo.22830657

Code: https://github.com/mjgallawayastro-stack/XMST-Paper-II

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Clustering — 20× in this paper · explained in 2 episodes
• Velocity Dispersion — 3× in this paper · explained in 2 episodes
• Robustness — 2× in this paper · explained in 5 episodes
• Benchmark — 1× in this paper · explained in 2 episodes
• Core — 1× in this paper · explained in 2 episodes
• European Space Agency — 1× in this paper
• Gaia Data Processing and Analysis Consortium — 1× in this paper
• Gaussian Mixture Model (GMM) — 1× in this paper · explained in 2 episodes
• Generative AI — 1× in this paper · explained in 2 episodes
• Pruning — 1× in this paper · explained in 4 episodes
• Verification — 1× in this paper · explained in 2 episodes

Sources

• XMST: An Extended Minimum Spanning Tree Framework with Objective Fracture-Scale Selection

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