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Chen, Cheng; Yang, Chao-chin; Martin, Rebecca G; Zhu, Zhaohuan
Monthly notices of the Royal Astronomical Society, 01/2021, Volume: 500, Issue: 3Journal Article
We investigate whether the regular Galilean satellites could have formed in the dead zone of a circumplanetary disc. A deadzone is a region of weak turbulence in which the magnetorotational instability is suppressed, potentially an ideal environmentfor satellite formation. With the grid-based hydrodynamic codeFAR GO3D, we examine the evolution of a circumplanetary discmodel with a dead zone. Material accumulates in the dead zone of the disc leading to a higher total mass and but a similartemperature profile compared to a fully turbulent disc model. The tidal torque increases the rate of mass transport through thedead zone leading to a steady-state disc with a dead zone that does not undergo accretion outbursts. We explore a range of disc,dead zone, and mass inflow parameters and find that the maximum mass of the disc is around 0.001MJ. Since the total solidmass of such a disc is much lower, we find that there is not sufficient material in the disc forin situformation of the Galileansatellites and that external supplement is required.
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