James Webb Space Telescope Feed Post

Arxiv: Exploring the Dark Energy Equation of State with JWST Published: 7/21/2023 9:15:23 AM Updated: 9/2/2024 6:24:39 AM

Paper abstract: Observations from the James Webb Space Telescope (JWST) have unveiled severalgalaxies with stellar masses M_*\gtrsim10^{10} M_\odot at redshifts7.4<~ z<~ 9.1. These remarkable findings indicate an unexpectedlyhigh stellar mass density, which contradicts the prediction of the \Lambda \rmCDM model. Our study utilizes the Chevallier--Polarski--Linder (CPL)parameterization, one of the dynamic dark energy models, to probe the role ofdark energy on shaping galaxy formation. By considering varying star formationefficiencies within this framework, our analysis demonstrates that in auniverse with a higher proportion of dark energy, more massive galaxies areformed at high redshifts, given a fixed perturbation amplitude observed today.These intriguing results highlight the promising prospect of revealing thenature of dark energy by analyzing the high-redshift massive galaxies.