Formation of Planets in Binary Stars

在已发现的170颗围绕主序恒星运行的太阳系外行星中，约有20颗已知存在于恒星双星系统中。在几个这样的系统中，双星的间隔大约是20个天文单位或更少，但它们仍然包含具有几个木星质量的行星。这些短周期双星系统中仅有行星的存在就对年轻的原行星的形成和生存场景构成了严格的限制。行星在形成的早期阶段的演化(与它们的初始形成过程无关)是由原行星盘与嵌入的行星相互作用决定的。在这个项目中，我们计划进行数值模拟，以研究在不同的双星和盘参数下双星系统中嵌入行星的演化，特别是对观测到的较短周期的天体。到目前为止，这些类型的模拟还没有进行过。

Among the discovered 170 extrasolar planets orbiting main sequence stars about 20 are known to reside in stellar binary systems. In several of these systems the binary separation is about 20 astronomical units or less, and they contain nevertheless planets with several Jupiter masses. The mere existence of planets in these shorter period binary systems poses severe constraints for formation and survival scenarios of young protoplanets.The evolution of planets during the early phase of their formation is (independent of their initial formation process) determined by the interaction of the protoplanetary disk with the embedded planet. In this project we plan to perform numerical simulations to study the evolution of embedded planets in binary star systems for a variety of binary and disk parameters, with special emphasis on the observed shorter period objects. These type of simulations have not been performed as of today.