A new null test is proposed to isolate cosmologies with non-FLRW observational relations by characterizing how they violate curvature-consistency tests of the standard FLRW framework.
Di Valentino, arXiv preprint arXiv:2601.01525 (2026)
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Sign-switching dark energy with a transition at z_† fits recent DESI DR2, Planck CMB, and Pantheon+ data better than ΛCDM while raising the inferred Hubble constant and easing the Hubble tension.
A giant ring structure at z~0.8 is identified with >4σ elliptical shell matches and 3.5σ clustering on ~320 Mpc scales using FilFinder and 2D power spectrum analysis.
citing papers explorer
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Observational Tests for Distinguishing Classes of Cosmological Models
A new null test is proposed to isolate cosmologies with non-FLRW observational relations by characterizing how they violate curvature-consistency tests of the standard FLRW framework.
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Sign-Switching Dark Energy: Smooth Transitions with Recent DESI DR2 Observations
Sign-switching dark energy with a transition at z_† fits recent DESI DR2, Planck CMB, and Pantheon+ data better than ΛCDM while raising the inferred Hubble constant and easing the Hubble tension.
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A Giant Ring on the sky
A giant ring structure at z~0.8 is identified with >4σ elliptical shell matches and 3.5σ clustering on ~320 Mpc scales using FilFinder and 2D power spectrum analysis.