盘星系中的有序和混沌螺旋
Ordered and chaotic spirals in disk galaxies
摘要：
旋涡星系的模式速度与其盘中物质的流动密切相关。遵循“进动椭圆”范式的流（参见例如，Kalnajs 1973）可能与缓慢旋转的螺旋有关，螺旋在其末端有共转。这样的流动可以通过围绕稳定的椭圆形x_1周期轨道捕获的材料来保证，该轨道随着其雅可比常数的变化而进动。相反，如果部分旋臂位于共转区域，那么螺旋结构必须在混沌区域“生存”。条形螺旋系统具有单一的模式速度和一个酒吧结束之前，但接近，共转是候选人有螺旋支持的恒星在混乱的运动。在这项工作中，我们审查的流量，我们已经发现在响应模型中的各种类型的螺旋电位，并指出的情况下，秩序或混乱的形状所观察到的形态。
英文摘要：
The pattern speeds of spiral galaxies are closely related to the flow of material in their disks. Flows that follow the `precessing ellipses' paradigm (see e.g., Kalnajs 1973) are likely associated with slowly rotating spirals, which have corotation beyond their end. Such a flow can be secured by material trapped around stable, elliptical, x_1 periodic orbits precessing as their Jacobi constant varies. Contrarily, if part of the spiral arms is located at a corotation region then the spiral structure has to `survive' in chaotic regions. Barred-spiral systems with a single pattern speed and a bar ending before, but close to, corotation are candidates for having spirals supported by stars in chaotic motion. In this work we review the flows we have found in response models for various types of spiral potentials and indicate the cases, where order or chaos shapes the observed morphologies.
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