2023/10/12 by A. N. Ormondroyd, Will Handley, Ormondroyd, A. N. +5 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #High-Energy Particle Collisions Research
paper · pdf · doi:10.48550/arxiv.2310.08490
openalex publication_date 2023/10/12 · openalex created_date 2023/10/14 · openalex updated_date 2026/07/28
We provide a nested sampling analysis of the combination of CMB lensing experiments with other cosmological measurements. Nested samples can be used to compute global consistency statistics between datasets. This is demonstrated for CMB lensing and Baryon Acoustic Oscillations which are uncorrelated, and the correlated case between ACT DR6 and NPIPE lensing. We investigate the effect of the prior widths of the spectral tilt n_\mathrm s used in CMB lensing analyses, which quantitatively, but not qualitatively, affect headline constraints. In the absence of informative priors, SPT-3G performs more similarly to ACT and NPIPE. Bayes factors and the suspiciousness statistic are used to quantify the possibility of tension, and we find the Gaussian assumptions inherent in calculating the suspiciousness tension probability to be unsuitable in the case of strong agreement between CMB lensing experiments.