首页|Cosmological Constraints on Neutrino Masses in Light of JWST Red and Massive Candidate Galaxies
Cosmological Constraints on Neutrino Masses in Light of JWST Red and Massive Candidate Galaxies
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The overabundance of the red and massive candidate galaxies observed by the James Webb Space Telescope(JWST)implies efficient structure formation or large star formation efficiency at high redshift z～10.In the scenario of a low or moderate star formation efficiency,because massive neutrinos tend to suppress the growth of structure of the universe,the JWST observation tightens the upper bound of the neutrino masses.Assuming A cold dark matter cosmology and a star formation efficiency ∈[0.05,0.3](flat prior),we perform joint analyses of Planck+JWST and Planck+BAO+JWST,and obtain improved constraints Σmv＜0.196eV and Σmv＜0.111 eV at 95％ confidence level,respectively.Based on the above assumptions,the inverted mass ordering,which implies Σmv≥0.1eV,is excluded by Planck+BAO+JWST at 92.7％ confidence level.
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