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Observational Space Unveils Cosmic Expansion's Role in the Hubble Tension

Observational Space Unveils Cosmic Expansion's Role in the Hubble Tension

来源:Arxiv_logoArxiv
英文摘要

We introduce a geometric embedding method that directly constrains $H_0$ by exploiting the exact kinematic relation $\dot{z} = H_0(1+z) - H(z)$ in a unified observational framework. This approach reconstructs expansion history without requiring specific cosmological models, incorporating both existing Cosmic Chronometer data and forecasted Sandage-Loeb measurements. Through mathematical embedding of observational constraints, we achieve $\sim 1.6\%$ precision in $H_0$ determination, matching current Cepheid distance ladder accuracy while maintaining model independence. The method demonstrates how fundamental kinematic constraints enable precision cosmology, providing a promising pathway to address the Hubble tension as future redshift drift observations become available.

Kang Jiao、Tong-Jie Zhang、Liang Gao

天文学

Kang Jiao,Tong-Jie Zhang,Liang Gao.Observational Space Unveils Cosmic Expansion's Role in the Hubble Tension[EB/OL].(2025-06-20)[2025-07-16].https://arxiv.org/abs/2506.16669.点此复制

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