arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.01384astro-ph.EP
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具有死区的环行星盘的演化

The evolution of a circumplanetary disc with a dead zone

Cheng Chen, Chao-Chin Yang, Rebecca G. Martin, Zhaohuan Zhu

摘要:

我们调查是否有规律的伽利略卫星可以形成在一个环行星盘的死区。死区是一个弱湍流的区域,其中磁旋转不稳定性(MRI)被抑制,可能是卫星形成的理想环境。基于网格的流体动力学代码,FARGO3D,我们研究了一个环行星盘模型与死区的演变。材料积聚在盘的死区中,导致更高的总质量,但与完全湍流盘模型相比具有相似的温度分布。潮汐扭矩增加了通过死区的质量传输速率,导致具有不经历吸积爆发的死区的稳定状态盘。我们探索了一系列的光盘,死区和质量流入参数,并发现光盘的最大质量约为0.001兆焦耳。由于这样的盘的总固体质量要低得多,我们发现,没有足够的材料在现场形成的伽利略卫星的盘和外部补充是必需的。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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