论文标题
由具有快速向内迁移的行星形成的差距的模型
Model of a gap formed by a planet with fast inward migration
论文作者
论文摘要
在原星盘中形成行星。最近的观察结果揭示了诸如差距和环之类的子结构，这可能表明磁盘内形成行星。由于磁盘 - 平面相互作用，行星在磁盘内迁移，这可能会影响行星引起的间隙的形状。在本文中，我们通过进行流体动力模拟来研究行星快速向内迁移对间隙形状的影响。我们发现，当迁移时间尺度比间隙开放的时间尺度短时，与间隙的径向位置相比，轨道半径被向内移动。我们还发现，行星位置的径向移动与间隙之间的缩放关系是迁移时间尺度和开放缝隙的比率的函数。我们的缩放关系还使我们能够限制观察到间隙和行星时的气体表面密度和粘度。此外，我们还发现了次级间隙的位置与纵横比的位置之间的缩放关系。通过结合径向移位和次要间隙，我们可能会限制行星形成的物理状况以及行星如何从观测形态中从原星盘中演变。
A planet is formed within a protoplanetary disk. Recent observations have revealed substructures such as gaps and rings, which may indicate forming planets within the disk. Due to disk--planet interaction, the planet migrates within the disk, which can affect a shape of the planet-induced gap. In this paper, we investigate effects of fast inward migration of the planet on the gap shape, by carrying out hydrodynamic simulations. We found that when the migration timescale is shorter than the timescale of the gap-opening, the orbital radius is shifted inward as compared to the radial location of the gap. We also found a scaling relation between the radial shift of the locations of the planet and the gap as a function of the ratio of the timescale of the migration and gap-opening. Our scaling relation also enables us to constrain the gas surface density and the viscosity when the gap and the planet are observed. Moreover, we also found the scaling relation between the location of the secondary gap and the aspect ratio. By combining the radial shift and the secondary gap, we may constrain the physical condition of the planet formation and how the planet evolves in the protoplanetary disk, from the observational morphology.
