论文标题
在损坏的原动性磁盘的系统中产生恒星倾斜的斜率
Generating Stellar Obliquity in Systems with Broken Protoplanetary Disks
论文作者
论文摘要
少量千分表对年轻星际星云的观察结果的最新进展打开了一个前所未有的窗口，进入了原行星磁盘的结构，该磁盘揭示了破裂和错误对准磁盘的惊人无处不在。在这项工作中，我们证明了这样的磁盘能够将其宿主星的旋转轴扭转，这代表了迄今未探索的途径，可以通过该途径产生恒星的斜率。该机制的基础是恒星自旋进动和内盘回归频率的交叉，导致了恒星倾斜的绝热激发。我们得出了内部磁盘和星的特征频率的分析表达式，这是磁盘间隙边界的函数，并对磁盘结构的磁盘结构近似限制，预期频率交叉和产生的斜率激发，从而说明了该模型的功效。累积地，我们的结果支持新兴的共识，即明显的自旋轨道未对准是行星形成的预期结果。
Recent advances in sub-millimeter observations of young circumstellar nebulae have opened an unprecedented window into the structure of protoplanetary disks, which has revealed the surprising ubiquity of broken and misaligned disks. In this work, we demonstrate that such disks are capable of torquing the spin axis of their host star, representing a hitherto unexplored pathway by which stellar obliquities may be generated. The basis of this mechanism is a crossing of the stellar spin precession and inner disk regression frequencies, resulting in adiabatic excitation of the stellar obliquity. We derive analytical expressions for the characteristic frequencies of the inner disk and star as a function of the disk gap boundaries, and place an approximate limit on the disk architectures for which frequency crossing and resulting obliquity excitation are expected, thereby illustrating the efficacy of this model. Cumulatively, our results support the emerging concensus that significant spin-orbit misalignments are an expected outcome of planet formation.
