Sling amplification and eccentric gravitational instabilities in gaseous disks
Sling amplification and eccentric gravitational instabilities in gaseous disks
复制标题
气态盘中的吊索放大和偏心引力不稳定性
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
S. Ruden
中科院分区：
文献类型：
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作者：
F. Shu;S. Tremaine;F. Adams;S. Ruden
本文对最近在近开普勒盘中发现的一种偏心引力不稳定性的模式机制进行了解析描述。导出了一个量子条件，它准确地预测了这些模式的花样速度。确定了模式的增长率，结果表明，当圆盘对轴对称扰动安全稳定时，模式可以增长。讨论了外缘边缘稳定的情况，并考虑了这些结果对与年轻星体相关的盘内双星伴星和/或巨行星的形成的影响。
An analytical description is presented of the modal mechanisms relevant to a recently discovered type of eccentric gravitational instability in nearly Keplerian disks. A quantum condition is derived which accurately predicts the pattern speeds for these modes. The growth rates for the modes are determined, and it is shown that the mode can grow when the disk is safely stable to axisymmetric disturbances. The case of marginal stability for the outside edge is discussed, and the implications of the results for the formation of binary companions and/or giant planets within disks associated with young stellar objects are considered.