Seminarium "Teoria cząstek elementarnych i kosmologia"

The JWST has recently detected surprisingly luminous early galaxies indicating a tension with the LCDM. In this talk, I will describe these observations and discuss different new physics scenarios that could explain them. In addition, I will discuss how the gravitational wave observations can cast light on the formation of supermassive black holes as well as early galaxies, and speculate on a possible connection between the JWST and pulsar timing array observations.