Observations from the JWST reveal an unexpectedly abundant population of little red dots and overmassive black holes in the early Universe, which are confirmed by their formation in fully cosmological radiation-hydrodynamic simulations.
Our cosmological initial conditions are based on the simulation Phi-4096 of ref.51. In this work, a dark-matter-only N-body simulation was performed in a comoving box of side length 16h1Mpc. The init… [+39066 chars]