Evolution of binary stars and the effect of tides on binary populations
Evolution of binary stars and the effect of tides on binary populations
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DOI：
10.1046/j.1365-8711.2002.05038.x
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发表时间：
2002-01
影响因子：
4.8
通讯作者：
J. Hurley;C. Tout;O. Pols
中科院分区：
文献类型：
--
作者：
J. Hurley;C. Tout;O. Pols
我们提出了一种快速的二元进化算法，该算法甚至可以对最复杂的二元系统进行建模。除了单星演化的各个方面外，还包括质量转移，质量积聚，公共 - 嵌入式进化，碰撞，超新星踢和角动量损失机制之类的特征。特别是，计算出潮汐相互作用的循环和同步，以对流，辐射和退化阻尼机制进行计算。我们使用该算法来研究各种二元系统的形成和演变。我们还研究了潮汐摩擦对二元进化结果的影响。使用快速的二元代码，我们生成一系列大型二元人群，并评估有趣的个体物种和事件的形成速率。通过比较有或没有潮汐摩擦的种群的结果，我们量化了迄今为止忽略潮汐的系统效应，并表明必须在二元系统中进行潮汐进化的建模，以便从人口综合工作中得出准确的结论。潮汐同步很重要，但是，由于轨道通常在Roche Lobe溢出之前循环循环，因此系统与相同半直肠的相互作用的结果几乎与偏心率无关。不必在相互作用的二进制文件中包括偏心率的分布。但是，初始分离应根据观察到的半肌层分布而不是周期或半轴轴分布。
We present a rapid binary-evolution algorithm that enables modelling of even the most complex binary systems. In addition to all aspects of single-star evolution, features such as mass transfer, mass accretion, common-envelope evolution, collisions, supernova kicks and angular momentum loss mechanisms are included. In particular, circularization and synchronization of the orbit by tidal interactions are calculated for convective, radiative and degenerate damping mechanisms. We use this algorithm to study the formation and evolution of various binary systems. We also investigate the effect that tidal friction has on the outcome of binary evolution. Using the rapid binary code, we generate a series of large binary populations and evaluate the formation rate of interesting individual species and events. By comparing the results for populations with and without tidal friction, we quantify the hitherto ignored systematic effect of tides and show that modelling of tidal evolution in binary systems is necessary in order to draw accurate conclusions from population synthesis work. Tidal synchronism is important but, because orbits generally circularize before Roche lobe overflow, the outcome of the interactions of systems with the same semilatus rectum is almost independent of eccentricity. It is not necessary to include a distribution of eccentricities in population synthesis of interacting binaries; however, the initial separations should be distributed according to the observed distribution of semilatera recta rather than periods or semimajor axes.