Formation of Giant Planets and their regular satellites

The problem of giant planets formation is central in term of understand the Solar System Origin. We are dealing with this problem since a long time, and we have refined, in the last years, our work. Presently we study the evolution of giant planets starting from the assumption that they are formed in two stages: first the central core is formed. When this central core reaches a critical value, then it becomes able to collect the surrounding gas. A rapid accretion then starts. The body temperature increases and the internal structure evolves. The first rapid accretion period is followed by a slower accretion period, during which the planet atmosphere expands. A disk is also formed that is feed by the protosolar nebula gaseous material. This disk is - at the beginning - embedded in the large planet atmosphere, but, as the planet contracts, gradually emerges from it. In disk accretion disk satellite formation can take place