Speaker
Prof.
Luca Visinelli
(Shanghai Jiao Tong University)
Description
The James Webb Space Telescope (JWST) is unveiling astounding results on the composition and evolution of the cosmo at very high redshifts. In this talk, I develop a UV luminosity function model for high-redshift galaxies, considering parameters such as the stellar formation rate, dust extinction, and halo mass function, calibrated at $z = 4\textrm{-}7$. Testing the model against higher redshifts suggests a negligible role of dust extinction very early on, prompting a modification of the stellar formation rate to incorporate a larger fraction of luminous objects per massive halo. I discuss some exotic explanations of this effect. Based on https://arxiv.org/abs/2403.13068
Primary author
Prof.
Luca Visinelli
(Shanghai Jiao Tong University)
