Abstract: Early observations with JWST have led to the discovery of an unexpectedly large density of massive galaxies at extremely early epochs in the history of the Universe.
Such results have a strong impact on cosmology. Here we show that—under the most conservative assumptions and independently of the baryon physics involved in galaxy formation—such galaxy abundance is not only in tension with the standard CDM cosmology but provides extremely tight constraints on the expansion history of the universe and on the growth factors corresponding to a wide class of Dynamical Dark Energy models. The implications of such results in terms of fundamental of cosmological models are discussed.
L'evento si svolge in Aula C - Via della Vasca Navale 84, piano terra
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