A hot big bang theory: magnetic fields and the early evolution of the protolunar disk

摘要: The leading theory for the formation of Earth's moon invokes a collision between Mars-sized body and proto-Earth to produce disk orbiting material that later condenses form Moon. Here we study early evolution protolunar disk. First, show opacity is large cooling therefore inefficient (t_{cool} \Omega >> 1). In this regime angular momentum transport in leads steady heating unless \alpha < \Omega)^{-1} << 1. Following earlier work by Charnoz Michaut, Carballido et al., once completely vaporized it well coupled magnetic field. We consider scenario which turbulence driven fields brief, hot phase where geometrically thick, wit h strong turbulent mixing. cools spreading until decouples from point out approximately half accretion energy dissipated boundary layer meets surface. This creates high entropy close Earth, driving convection Finally, hot, magnetized could drive bipolar outflows remove mass Earth-Moon system.