Space Sciences

Why reducing the cosmic sound horizon alone cannot fully resolve the Hubble tension

K. Jedamzik, L. Pogosian, et al.

Explore the intriguing Hubble tension that puzzles cosmologists: a disparity between locally measured and CMB-inferred universe expansion rates. This research, conducted by Karsten Jedamzik, Levon Pogosian, and Gong-Bo Zhao, uncovers that merely reducing the sound horizon at recombination does not solve the issue without contradicting other key datasets.

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