Search Publications

Implications of the Stellar Mass Density of High-z Massive Galaxies from JWST on Warm Dark Matter

Gong, Yan; Chen, Xuelei; Lin, Hengjie +1 more

A significant excess of the stellar mass density at high redshift has been discovered from the early data release of James Webb Space Telescope (JWST), and it may require a high star formation efficiency. However, this will lead to large number density of ionizing photons in the epoch of reionization (EoR), so that the reionization history will be…

Quantifying the Tension between Cosmological Models and JWST Red Candidate Massive Galaxies

Wang, Jun-Chao; Huang, Zhi-Qi; Huang, Lu +1 more

We develop a Python tool to estimate the tail distribution of the number of dark matter halos beyond a mass threshold and in a given volume in a light-cone. The code is based on the extended Press–Schechter model and is computationally efficient, typically taking a few seconds on a personal laptop for a given set of cosmological parameters. The hi…

Cosmological Constraints on Neutrino Masses in Light of JWST Red and Massive Candidate Galaxies

Su, Yan; Huang, Zhi-Qi; Liu, Jian-Qi

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 uni…

JWST Observations Constrain the Time Evolution of Fine Structure Constants and Dark Energy-electromagnetic Coupling

Feng, Lei; Lei, Lei; Fan, Yi-Zhong +1 more

It was hypothesized in the literature that some physical parameters may be time-evolving and the astrophysical data can serve as a probe. Recently, the James Webb Space Telescope (JWST) released its early observations. In this work, we select the JWST spectroscopic observations of the high redshift (z > 7.1) galaxies with strong [O III] (λ = 49…