Alignment of the Milky Way and M31 with their cosmic environment. New insights from constrained Local Group simulations

arXiv:2607.13005 · astro-ph.GA, astro-ph.CO · Submitted 2026-07-14 · Read on arXiv

Hanneke C. Woudenberg, Amina Helmi, Ewoud Wempe, Anna Genina, Simon D. M. White, Jens Jasche, Guilhem Lavaux

astro-ph.GA, astro-ph.CO

Submitted: 2026-07-14

Comments: Submitted to A&A. 17 pages, 15 figures

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

Terminology

• Alignment — 61× in this paper · explained in 1 episode
• Local Sheet — 26× in this paper
• Milky Way — 17× in this paper
• Clustering — 3× in this paper · explained in 2 episodes
• Fidelity — 1× in this paper · explained in 2 episodes
• N-body simulations — 1× in this paper · explained in 2 episodes
• Robustness — 1× in this paper · explained in 5 episodes

Sources

• Galactic Accelerations from the GD-1 Stream Suggest a Tilted Dark Matter Halo
• The effect of environment on the mass assembly history of the Milky Way and M31
• The mass distribution in and around the Local Group

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