两个碰撞的稀薄前星子的Angular momentum和双星的形成
Angular momentum of two collided rarefied preplanetesimals and formation of binaries
摘要：
研究了在近圆形日心轨道上运动的两个天体碰撞时的平均角动量。这些研究的结果被用来开发模型的形成双星在阶段的稀薄preplanetesimals。这些模型可以解释在距离太阳更远的地方形成的更大比例的双星。有时，在旋转的前星子内部可能有两个收缩中心，这是两个稀薄的前星子碰撞的结果。这种双星的形成可能会导致双星的质量几乎相同，但它们之间的距离很大。在主星周围形成盘状物可能是因为碰撞形成的稀薄前星子获得的角动量大于固体的临界角动量。主星系的一个或多个卫星可能由星盘形成。
英文摘要：
The mean angular momentum associated with the collision of two celestial objects moving in almost circular heliocentric orbits was studied. The results of these studies were used to develop models of the formation of binaries at the stage of rarefied preplanetesimals. The models can explain a greater fraction of binaries formed at greater distances from the Sun. Sometimes there could be two centers of contraction inside the rotating preplanetesimal formed as the result of a collision between two rarefied preplanetesimals. Such formation of binaries could result in binaries with almost the same masses of components separated by a large distance. Formation of a disk around the primary could result because the angular momentum that was obtained by a rarefied preplanetesimal formed by collision was greater than the critical angular momentum for a solid body. One or several satellites of the primary could be formed from the disk.
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