Cake Talk by Rhea-Silvia Remus

Recently, JWST has observed galaxies when the Universe was not

even 1Gyr old, and these galaxies exhibit a large variety of properties,

among which not the least fascinating are galaxies with extreme star

bursts uncompared to what is found at present day. At the same time, JWST

has also found a large number of massive galaxies that are already

quenched, a fact that challenges our picture and understanding of galaxy

formation through cosmic time. Using the hydrodynamical cosmological

simulation suite Magneticum Pathfinder, I will present how such massive

quenched galaxies are formed before z=3, and discuss their fate towards

lower redshifts. I will demonstrate that AGN feedback alone is not

sufficient to quench a galaxy at high redshifts, and that the environment

plays an important role. Finally, I will discuss the connection between

the massive starbursts seen in high redshift galaxies and the quenching

processes, and discuss the imprint of such rapid quenching in the

metallicity of the quenched galaxies.