The Mass Disruption of Oort Cloud Comets

The Mass Disruption of Oort Cloud Comets
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奥尔特云彗星的大规模破坏

DOI:
10.1126/science.1070226
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发表时间:
2002
期刊:
影响因子:
56.9
通讯作者:
W. Bottke
W. Bottke
中科院分区:
综合性期刊1区
文献类型:
--
作者:
H. Levison;A. Morbidelli;L. Dones;R. Jedicke;P. Wiegert;W. Bottke

文献摘要

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我们通过(I)将轨道分布模型与通过明确的调查发现的休眠彗星的统计模型相结合,以及(Ii)将模型结果与对一群休眠彗星的观测相比较,计算了太阳系中休眠的、近乎各向同性的奥尔特云彗星的数量。假设彗星不会被摧毁的动力学模型预测,我们应该已经发现了∼休眠的近各向同性彗星,比实际看到的要多100倍。因此,当彗星从奥尔特云向内演化时,它们中的大多数肯定是物理上的分裂。
We have calculated the number of dormant, nearly isotropic Oort cloud comets in the solar system by (i) combining orbital distribution models with statistical models of dormant comet discoveries by well-defined surveys and (ii) comparing the model results to observations of a population of dormant comets. Dynamical models that assume that comets are not destroyed predict that we should have discovered ∼100 times more dormant nearly isotropic comets than are actually seen. Thus, as comets evolve inward from the Oort cloud, the majority of them must physically disrupt.