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Cosmological Simulations of Galaxies

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arxiv 2507.08925 v1 pith:3QWG2JZD submitted 2025-07-11 astro-ph.GA

Cosmological Simulations of Galaxies

classification astro-ph.GA
keywords simulationsformationgalaxiesgalaxyphysicalcosmiccosmologicalessential
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Galaxy simulations have come a long way from the early days of simple N-body calculations, which considered only gravitational interactions, to the complex, multi-physics models used today. Beginning with initial conditions representative of the Universe shortly after the Big Bang, these modern simulations integrate the relevant physical processes involved in galaxy formation, such as gravity, gas dynamics, cooling, star formation, and feedback, while accounting for cosmic expansion and structure formation. This review provides an introductory overview of cosmological galaxy simulations, outlining the essential components and methods used to model the formation and evolution of galaxies on the computer. It also discusses common steps in the post-processing analysis, essential for extracting physical insights from these numerical experiments, along with basic tests to assess simulation validity and accuracy. Looking forward, next-generation simulations aim to push resolution boundaries, incorporate additional physical processes, and improve the robustness of the numerical models, promising to lead to a deeper understanding of how galaxies emerged and evolved over cosmic time.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. A comparison of numerical schemes for driven subsonic MHD turbulence

    astro-ph.IM 2026-07 accept novelty 6.0

    In idealised driven subsonic MHD boxes, Arepo, Athena and Ramses all show dynamo amplification whose residual differences are explained by numerical diffusion, with no systematic advantage of constrained transport.

  2. The DREAMS Project: Disentangling the Impact of Halo-to-Halo Variance and Baryonic Feedback on Milky Way Dark Matter Density Profiles

    astro-ph.GA 2025-12 unverdicted novelty 6.0

    Milky Way-mass dark matter density profiles in IllustrisTNG are largely insensitive to astrophysics and cosmology variations, dominated by halo-to-halo variance instead.

  3. TNG SAM: Bridging Hydrodynamical Complexity and Semi-Analytic Efficiency to Model Galaxy Formation

    astro-ph.GA 2026-06 unverdicted novelty 5.0

    The TNG SAM reproduces TNG hydro simulation gas and metal flows plus galaxy and halo properties within 30% accuracy out to z=6 via five targeted updates to the Santa Cruz SAM calibrated on stellar feedback-dominated galaxies.

  4. Impact of Cosmic Filaments on Galaxy Morphological Evolution and Predictions of Early Cosmic Web Structure for Roman

    astro-ph.GA 2025-09 unverdicted novelty 4.0

    IllustrisTNG simulations link filament density to galaxy morphology trends across redshifts and predict that Roman's planned HLWAS survey needs greater depth to accurately map the z=1 cosmic web.