Transition disks and planetary systems

本项目涉及II型过渡盘（td），其特点是在其粉尘分布中存在较大的内孔（数十au宽）。然而，它们显示了来自中心内部区域的显著气体吸积特征。在这种类型的TD中，大空腔是由一个或多个行星的存在造成的，清理了内部圆盘区域，这一建议在探测有两个嵌入行星的TD系统PDS70中得到了强有力的支持。对嵌入行星系统的圆盘进行理论建模，可以对预期的观测特征（尘埃和气体分布、恒星和行星的吸积光度）进行预测，这些特征可以直接与现有和未来的观测结果进行比较。在这个项目中，我们将遵循这一思路，并将进行多维流体动力学研究，以阐明行星对td的动力学影响。模拟将包括辐射效应，恒星辐射，跟踪嵌入尘埃的运动，并将详细解决嵌入行星附近的吸积流。

This project deals with type II Transition Discs (TDs) which are characterized by large inner holes (several tens of au wide) in their dust distribution. Nevertheless, they show significant gas accretion signatures coming from the central inner region. The suggestion that in this type of TDs the large cavity is created by the presence of one or more planets, that cleared out the inner disc region, has found strong support in detecting the TD system PDS70 with two embedded planets. Theoretical modeling of discs with embedded planetary systems will allow to make predictions on the expected observational signatures (dust and gas distribution, accretion luminosity of the stars and planet) which can be directly compared to existing and futures observations. In this project we shall follow this line of thought and will perform multi-dimensional hydrodynamic studies to clarify the dynamical impact of planets on TDs. The simulations will include radiative effects, stellar irradiation, follow the motion of embedded dust, and will resolve the accretion flow near the embedded planets in detail.