论文标题
带有死区的圆盘的演变
The evolution of a circumplanetary disc with a dead zone
论文作者
论文摘要
我们调查了常规的伽利略卫星是否可以在圆盘的死区中形成。死区是一个弱湍流的区域，其中磁化不稳定（MRI）被抑制，这可能是卫星形成的理想环境。借助基于网格的水动力代码FARGO3D，我们研究了具有死区域的圆盘模型的演变。材料积聚在圆盘的死区域，导致总质量更高，但与完全湍流的盘模型相比，温度曲线相似。潮汐扭矩增加了通过死区的质量运输速率，通向稳态盘，其死区未发生积聚爆发。我们探索一系列圆盘，死区和质量流入参数，发现盘的最大质量约为0.001 MJ。由于这种圆盘的总固体质量要低得多，因此我们发现，圆盘中没有足够的材料来原位形成加利利卫星，需要外部补充剂。
We investigate whether the regular Galilean satellites could have formed in the dead zone of a circumplanetary disc. A dead zone is a region of weak turbulence in which the magnetorotational instability (MRI) is suppressed, potentially an ideal environment for satellite formation. With the grid-based hydrodynamic code, FARGO3D, we examine the evolution of a circumplanetary disc model with a dead zone. Material accumulates in the dead zone of the disc leading to a higher total mass and but a similar temperature profile compared to a fully turbulent disc model. The tidal torque increases the rate of mass transport through the dead 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 0.001 MJ . Since the total solid mass of such a disc is much lower, we find that there is not sufficient material in the disc for in situ formation of the Galilean satellites and that external supplement is required.
