Planetary systems produced in the F1 (left panel), F2 (middle panel), and NoF (right panel) N-body simulations.The black circles represent the planets formed in the different numerical experiments, while each circle’s size scales with the planet’s mass, according to that indicated at the top of each panel. The sky-blue area illustrated in the differentpanels represents the HZ derived by Kopparapu et al. (2013).