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Will LCDM cosmology survive the James Webb Space Telescope

2022, Submitted for publication to MNRAS

Abstract

The James Webb space telescope (JWST) is about to deliver scientific data. Fundamental contributions are expected in all fields of astronomy. Here we focus on the distant Universe, for the JWST is expected to consolidate once and for all the Lambda Cold Dark Matter (LCDM) cosmology. Most crucially, "The End of the Dark Ages: First Light and Reionization" and "The Assembly of Galaxies" are the first two of the four primary JWST Science Goals. Here we critically challenge the general expectations, giving a set of alternatives, presented before they can be either proved or disproved. Our conclusion is that the JWST will provide data incompatible with LCDM cosmology, forcing a revolution both in astronomy and fundamental physics.