论文标题
旋转对崩溃的恒星中对流涡度演变的影响
Impact of rotation on the evolution of convective vortices in collapsing stars
论文作者
论文摘要
我们研究旋转对恒星崩溃期间对流涡流流体动力演变的影响。使用线性流体动力学方程，我们研究了涡流从其初始半径中的对流壳中的演变，直至较小的半径，预计它们会遇到超新星冲击。我们发现，涡旋的演变主要受两种效果的控制：插入的加速度和随附的旋转速度。前者效应导致涡旋的径向拉伸，从而限制了涡流速度。后一种效应导致旋转方向涡流的角变形，从而扩大了其非rad速度。我们表明，涡旋的径向速度不受旋转的显着影响。我们研究声波发射，发现它对旋转不敏感。最后，我们分析了旋转点的影响，并发现它对整个声波发射的影响很小。
We study the impact of rotation on the hydrodynamic evolution of convective vortices during stellar collapse. Using linear hydrodynamics equations, we study the evolution of the vortices from their initial radii in convective shells down to smaller radii where they are expected to encounter the supernova shock. We find that the evolution of vortices is mainly governed by two effects: the acceleration of infall and the accompanying speed up of rotation. The former effect leads to the radial stretching of vortices, which limits the vortex velocities. The latter effect leads to the angular deformation of vortices in the direction of rotation, amplifying their non-radial velocity. We show that the radial velocities of the vortices are not significantly affected by rotation. We study acoustic wave emission and find that it is not sensitive to rotation. Finally, we analyze the impact of the corotation point and find that it has a small impact on the overall acoustic wave emission.
