Giant Planet Formation

观测到的巨行星靠近其主星，为热木星；远离其主星，为直接成像的巨行星；以及更典型的巨行星，类似于我们太阳系中的木星。我们知道，大约10%的恒星拥有一颗类似木星的行星，这些行星以一种尚不为人所知的方式与更普遍的亚海王星联系在一起。目前，关于巨行星形成还有许多悬而未决的问题。特别是，还不知道它们是如何达到最终质量的。例如，它们可能只是在特定的时间内共生；然而，可能有一些基本的过程阻止了共生。此外，在几个AU观察到的巨行星堆积，目前尚不清楚这是因为在这个位置更容易形成行星，还是迁徙会导致这种堆积。在这个项目中，我们将使用流体力学模拟和分析理论来研究巨行星的形成，旨在回答上述问题。

Giant planets are observed to appear close to their host star, as Hot Jupiters; far away from their host star, as directly imaged giant planets; and in as more typical giant planets similar to Jupiter in our Solar System. We know that about 10% of all stars host a Jupiter-like planet, and these are connected in an as-yet-unknown way to the more ubiquitous sub-Neptunes. Currently, there are many unsolved problems with regard to giant planet formation. In particular, it is unknown how they reach their final mass. For example, it could be they just accrete for a specific time; however, there could be some fundamental process that stops accretion. In addition, there is an observed pile up of giant planets at a few AU, and it is unknown whether this is due to planet formation occurring more easily at this location or if migration will cause this pile-up. In this project we will use hydrodynamic simulations and analytic theory to investigate giant planet formation; aiming to answer the questions above.