论文标题
停止磁层雕刻的原星盘中的迁移
Halting Migration in Magnetospherically Sculpted Protoplanetary Disks
论文作者
论文摘要
我们为恒星磁场雕刻原球门磁盘的内边缘的方式提供了一个出于身体动机的模型，并检查了迁移和停止亚新持久和超级地球行星的后果。该模型结合了磁盘内部截断的过渡区域，其中通过恒星磁场扩散到磁盘中来改变表面密度的曲线。这种修饰会导致过渡区外边缘的迁移陷阱。我们考虑了一系列出色的磁场强度和磁扩散曲线，进行了单行星迁移的模拟。我们的模拟显示，行星的最终位置与他们的主机恒星可用于磁盘的总磁预算之间存在紧密的关系。我们发现，在67至180G之间的恒星磁场和3至2.75之间的幂律指数可以合理地重现观察到的近距离倒下和亚纽扣群体的发生率的位置。
We present a physically motivated model for the manner in which a stellar magnetic field sculpts the inner edge of a protoplanetary disk, and examine the consequence for the migration and stopping of sub-Neptune and super-Earth planets. This model incorporates a transition zone exterior to the inner truncation of the disk, where the surface density profile is modified by the diffusion of the stellar magnetic field into the disk. This modification results in a migration trap at the outer edge of the transition zone. We performed simulations of single planet migration, considering a range of stellar magnetic field strengths and magnetic diffusion profiles. Our simulations show a tight relationship between the final locations of planets and the total magnetic budget available for the disk from their host star. We found that a stellar magnetic field between 67 to 180G and a power-law index between 3 and 2.75 can reasonably reproduce the location at which the observed occurrence rate of close-in Super-Earth and Sub-Neptune populations changes slope.
