When Streams Curve Away: a Test of Dark Matter from Extragalactic Stellar Stream Populations

arXiv:2609.40057 · astro-ph.GA, astro-ph.CO · Submitted 2026-09-30 · Read on arXiv

astro-ph.GA, astro-ph.CO

Submitted: 2026-09-30

Updated: 2026-09-30

Code: https://github.com/ax-ml/jax

Terminology

• Alignment — 10× in this paper · explained in 1 episode
• Calibration — 7× in this paper · explained in 7 episodes
• Robustness — 4× in this paper · explained in 5 episodes
• Trace — 2× in this paper · explained in 2 episodes
• Bayesian Inference — 1× in this paper · explained in 5 episodes
• Core — 1× in this paper · explained in 2 episodes
• Dark Energy Survey — 1× in this paper
• Degeneracy — 1× in this paper · explained in 3 episodes
• Fidelity — 1× in this paper · explained in 2 episodes
• Forward modeling — 1× in this paper · explained in 2 episodes
• Gravitational Lensing — 1× in this paper · explained in 2 episodes
• Legacy Survey of Space and Time — 1× in this paper
• N-body simulations — 1× in this paper · explained in 2 episodes
• Velocity Dispersion — 1× in this paper · explained in 2 episodes

Sources

• Constraining the population of dark matter halo shapes using hierarchical inference with extragalactic stellar streams
• Constraints on the population level distribution of nearby Dark Matter halo shapes with extragalactic streams
• RomAndromeda: The Roman Survey of the Andromeda Halo
• Euclid Quick Data Release (Q1) -- Data release overview
• Euclid Quick Data Release (Q1): The geometry of dark matter halos from extragalactic streams
• Euclid Quick Data Release (Q1): First visual morphology catalogue
• Jeans Model for the Shapes of Self-interacting Dark Matter Halos
• Extragalactic Stellar Streams in Time-Dependent Cosmological Halos
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• Deep Imaging Meets Motion: Complementing Stream Photometry Through Planetary Nebula Kinematics
• Potamides: Mapping Dark Matter Halo Shapes from Stellar Stream Tracks in the Local Universe

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