astro-ph.CO · 2026-06-23 · No. 32

Cosmology and Nongalactic Astrophysics, 2026-06-23.

1 new papers in astro-ph.CO. Titles, authors, abstracts. Links to arXiv. Want this in your inbox every morning? Subscribe →

01 — The papers

1 entries
  1. 01

    Field-level weak lensing cosmology with $<100$ simulations using multifidelity simulation-based inference

    Alex A. Saoulis, Kiyam Lin, Niall Jeffrey, Maximilian von Wietersheim-Kramsta, Davide Piras, Alessio Spurio Mancini,...

    astro-ph.CO · cs.AI

    We perform a realistic KiDS-Legacy mock analysis with field-level neural compression and simulation-based inference using fewer than 100 $N$-body simulations. The weak lensing shear field encodes substantially more cosmological information than standard two-point summary statistics such as the power spectrum. Field-level inference can fully exploit this information, but physical realism at the field-level requires very high-fidelity...

    arxiv.org/abs/2606.23346 · PDF

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