Average spatial curvature contributes about 10% to the local cosmic energy budget on scales up to 300 Mpc/h while kinematical backreaction stays below 1% on the smallest scales, with no convergence to the global Lambda-CDM model.
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Galaxy cluster observations yield two preferred directions with cosmic anisotropy amplitude of about 5.3 times 10 to the minus 4 at roughly 1 sigma overall significance, though higher in the XMM-Newton subsample.
Local Hubble constant anisotropy in Cosmicflows-4 data is primarily attributed to peculiar velocities and survey structure rather than cosmic-scale isotropy violation, with limited implications for the Hubble tension.
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Backreaction and the Role of Spatial Curvature in the Cosmic Neighborhood
Average spatial curvature contributes about 10% to the local cosmic energy budget on scales up to 300 Mpc/h while kinematical backreaction stays below 1% on the smallest scales, with no convergence to the global Lambda-CDM model.
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New constraints on cosmic anisotropy from galaxy clusters using an improved dipole fitting method
Galaxy cluster observations yield two preferred directions with cosmic anisotropy amplitude of about 5.3 times 10 to the minus 4 at roughly 1 sigma overall significance, though higher in the XMM-Newton subsample.
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Updates on dipolar anisotropy in local measurements of the Hubble constant from Cosmicflows-4
Local Hubble constant anisotropy in Cosmicflows-4 data is primarily attributed to peculiar velocities and survey structure rather than cosmic-scale isotropy violation, with limited implications for the Hubble tension.