Same as Fig. {fig:smoothing_SNIa

Same as Fig. {fig:smoothing_SNIa

Iterative smoothing on SNIa data. The results for the Pantheon+ compilation are displayed in the left column, while the results for DES~Y5 are displayed in the right column. The selection criterion is $ ^2_{ {SNIa

Results for the $ $ diagnostic, with selection criterion is $ ^2_{ {SNIa

Model independent test of the FLRW metric and the curvature in light of DESI DR2. Cléa Millard et. al. https://arxiv.org/abs/2601.20293

Model independent test of the FLRW metric and the curvature in light of DESI DR2 We perform a data-driven test of the FLRW metric and the flatness of the Universe, independently of any Dark Energy model, and in light of the latest DESI DR2 results. We use Pantheon+ and DESY5 SNIa ...

🧵 (3/3) Main takeaway: the apparent tension mostly lives in the sparse high-z end of Pantheon+.

Restricting to z < 1.13 restores consistency with FLRW. DES-Y5 + DESI DR2 looks broadly consistent in this framework.

Millard et al.:
arxiv.org/abs/2601.20293

🧵 (2/3) What we do: a model-independent FLRW “litmus test” using the 𝒪k(z) diagnostic.

Inputs:
• DESI DR2 BAO (transverse + radial modes)
• SNe Ia distances from Pantheon+ and DES-Y5
Method:
• iterative smoothing to reconstruct D(z) and D′(z) without assuming a DE model.

Model independent test of the FLRW metric and the curvature in light of DESI DR2 We perform a data-driven test of the FLRW metric and the flatness of the Universe, independently of any Dark Energy model, and in light of the latest DESI DR2 results. We use Pantheon+ and DESY5 SNIa ...

🧵 (1/3) Do our late-time distance data actually pass the FLRW consistency check?

New preprint led by Cléa Millard (graduate student in our group):
arxiv.org/abs/2601.20293
#cosmology #astrophysics

Detection of an orthogonal alignment between parsec-scale AGN jets and their host galaxies Nature Astronomy - The parsec-scale radio jets that form around supermassive black holes are orthogonal to the (kiloparsec-scale) optical shape of the galaxies they’re hosted in, implying an...

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