Where Have All the Comets Gone?
Where Have All the Comets Gone?
复制标题
所有彗星都去哪儿了？
作者：
M. Bailey
大多数到达内太阳系的彗星都起源于奥尔特云。然而，描述这类彗星动力学演化的模型预测的短周期轨道彗星比观测到的要多得多。从他的角度来看，
贝利
讨论了一个更精细的模型的含义（
利维森
等）。这仍然预测了观测到的“哈雷型”彗星相对于观测过量，并得出结论，大多数奥尔特云彗星分裂成看不见的小碎片。这和其他建议，以占彗星的“失踪质量”进行了讨论。在收集重要线索的同时，彗星的耦合物理动力学演化提出了一个有趣的难题。
The majority of comets that reach the inner solar system originate in the Oort cloud. However, models describing the dynamical evolution of such comets predict far more comets in short-period orbits than are observed. In his Perspective,
Bailey
discusses the implications of a more refined model (
Levison
et al.) that still predicts a surfeit of observed "Halley-type" comets relative to observations, and which concludes that the majority of Oort cloud comets disrupt into invisibly small fragments. This and other suggestions to account for the cometary "missing mass" are discussed. While important clues are being gathered, the coupled physicodynamical evolution of comets presents an intriguing puzzle.