Tidal disruption and tidal coalescence in binary stellar systems
Tidal disruption and tidal coalescence in binary stellar systems
复制标题
DOI：
10.1093/mnras/184.4.871
复制
发表时间：
1978-10
影响因子：
4.8
通讯作者：
S. M. Alladin;M. Parthasarathy
中科院分区：
文献类型：
--
作者：
S. M. Alladin;M. Parthasarathy
研究了双星系统中的潮汐力效应。在恒星系统中恒星的运动与双星系统的轨道运动相比可以忽略的简化假设下，估计了双星系统中某一组分的结合能的增加率和轨道运动能量的减少率。中断的一个组件的时间和合并的对的时间获得的功能的分离和质量比的二进制的距离以及接近重叠对。应用于球状星团和双星星系，对于一对相同的星系，这对星系的合并速度比其组成部分的分裂速度快。对中半径潮汐效应的研究表明，一对在圆相对轨道上运动的接触球星系，在小于三个公转周期的时间间隔内将合并成一个系统。组件的破坏速度慢六倍。随着分离度的降低，破碎速率的增加速度快于聚结速率。
Tidal force effects in binary stellar systems are considered. Estimates are made for the rate of increase of the binding energy of a component and the rate of decrease of the energy of the orbital motion of the binary under the simplifying assumption that the motion of the stars in the stellar systems may be neglected in comparison with the orbital motion of the binary system. The time of disruption of a component and the time of coalescence of the pair are obtained as functions of the separation and mass ratio of the binary for distant as well as close overlapping pairs. Applications are made to globular clusters and binary galaxies.For a pair of identical galaxies the rate of coalescence of the pair is faster than that of the disruption of the components. A study of the tidal effects at the median radius indicates that a pair of contact spherical galaxies moving in circular relative orbit, will merge and form a single system in a time interval less than three periods of revolution. The rate of disruption of the components is six times slower. As the separation decreases, the rate of disruption increases faster than the rate of coalescence.