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.

00:00

Playback language: English

Index

Abstract

The Hubble tension, a mismatch between locally measured and CMB-inferred universe expansion rates, is a major cosmological problem. Many proposed solutions focus on reducing the sound horizon at recombination (rs). This paper demonstrates that models solely reducing rs cannot fully resolve the Hubble tension while remaining consistent with other cosmological datasets. Models achieving a higher Hubble constant with lower matter density (Ωmh²) conflict with baryon acoustic oscillation (BAO) observations, while models with larger Ωmh² conflict with galaxy weak lensing data.

Publisher

Communications Physics

Published On

Jun 08, 2021

Authors

Karsten Jedamzik, Levon Pogosian, Gong-Bo Zhao

Related Publications

Explore these studies to deepen your understanding of the subject.

Political Science

The effect of official intervention on reducing the use of potentially discriminatory language during the COVID-19 pandemic in China

Y. Jiang, H. Wu, et al.

Earth Sciences

Climate and land use changes explain variation in the A horizon and soil thickness in the United States

Y. Zhang, A. E. Hartemink, et al.

Engineering and Technology

The electrode tortuosity factor: why the conventional tortuosity factor is not well suited for quantifying transport in porous Li-ion battery electrodes and what to use instead

T. Nguyen, A. Demortière, et al.

Agriculture

Exogenous metabolite application is a potential strategy for expanding the use of direct rice seeding with the aim of reducing seeding costs

B. Qing, Y. Jiang, et al.

Listen, Learn & Level Up

Over 10,000 hours of research content in 25+ fields, available in 12+ languages.

No more digging through PDFs, just hit play and absorb the world's latest research in your language, on your time.

listen to research audio papers with researchbunny