The effect of an external disk on the orbital elements of a central binary
The effect of an external disk on the orbital elements of a central binary
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DOI：
10.1086/185971
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发表时间：
1991-03
期刊：
影响因子：
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通讯作者：
P. Artymowicz;C. Clarke;S. Lubow;J. Pringle
中科院分区：
文献类型：
--
作者：
P. Artymowicz;C. Clarke;S. Lubow;J. Pringle
利用平滑粒子流体动力学，发现了环双星盘的准稳态结构，并评估了其与中心双星系统的引力相互作用。检查了双星轨道元素的变化率。结果表明，一般情况下，半长轴减小，偏心率增大，轨道顺行进动。提供了一种特定模型的数值结果以及对所发现的影响（主要是偏心驱动的影响）的定性解释。嵌入盘中的原双星或新形成的双星在盘分散之前可能会经历显着的轨道演化。讨论了结果在解释观测到的二元偏心率统计数据中的应用。 32 参考文献
Using smoothed particle hydrodynamics, the quasi-stationary structure of a circumbinary disk is found and its gravitational interaction with the central binary system is evaluated. The resulting rate of change of the orbital elements of the binary is examined. It is demonstrated that, in general, the semimajor axis decreases, the eccentricity grows, and the orbit precesses in the prograde sense. Numerical results for one particular model and a qualitative explanation for the effects found, mainly that of eccentricity driving, are provided. A protobinary or newly formed binary star embedded in a disk may undergo a significant orbital evolution before the disk dispersal. The application of the results to the interpretation of the observed statistics of binary eccentricities is discussed. 32 refs.