Výsledky vyhledávání - "Zhang, Wangzheng"

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Measuring the Hubble constant through the galaxy pairwise peculiar velocity

Autor: Zhang, Wangzheng, Chu, Ming-chung, Liao, Shihong, Yeung, Shek, Hu, Hui-Jie

The Hubble constant $H_0$, the current expansion rate of the universe, is one of the most important parameters in cosmology. The cosmic expansion regulates the mutually approaching motion of a pair of celestial objects due to their gravity. Therefore

Externí odkaz: http://arxiv.org/abs/2412.04660

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Resolving the $H_0$ and $S_8$ tensions with neutrino mass and chemical potential

Autor: Yeung, Shek, Zhang, Wangzheng, Chu, Ming-chung

A simple and natural extension of the standard $\Lambda$CDM model is to allow relic neutrinos to have non-zero degeneracy. We confront this $\Lambda$CDM$\xi$ model, $\Lambda$CDM with neutrino mass $M_\nu$ and degeneracy $\xi_3$ as additional paramete

Externí odkaz: http://arxiv.org/abs/2403.11499

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Measuring neutrino mass and asymmetry with matter pairwise velocities

Autor: Zhang, Wangzheng, Chu, Ming-chung, Hu, Rui, Liao, Shihong, Yeung, Shek

Publikováno v: MNRAS 529, 360 (2024)

Neutrinos are believed to be the most abundant fermions in the Universe, but their masses are unknown, except for being non-zero but much smaller than other fermions. Cosmological relic neutrinos could also have non-zero chemical potentials (or asymm

Externí odkaz: http://arxiv.org/abs/2312.04278

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