Constraints on the Birth Aggregate of the Solar System
Constraints on the Birth Aggregate of the Solar System
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DOI：
10.1006/icar.2000.6567
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发表时间：
2000-11
期刊：
影响因子：
3.2
通讯作者：
F. Adams;G. Laughlin
中科院分区：
文献类型：
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作者：
F. Adams;G. Laughlin
利用我们太阳系的观测特性，特别是陨石的同位素组成和行星轨道的规律性，我们将太阳的星星形成环境限制在大质量星星（外部）放射性富集的情况下。这个计算产生了太阳诞生集合体中恒星数量的概率分布。太阳最有可能是在一个恒星群中形成的，该恒星群包含N= 2000±1100个成员。在这种环境中形成星星的先验概率是P = 0.0085;即，120个太阳系中只有1个是在类似条件下形成的。我们讨论了这种情况下的其他影响，包括可能的影响，从辐射场提供的假定集群环境和动力学破坏的柯伊伯带。本文的约束条件严格限制的太阳出生聚集体的外部富集的情况下，由一个大质量的星星的属性;或者，这些严格的约束稍微有利于短寿命的放射性物质的自我富集的情况。
Using the observed properties of our Solar System, in particular the isotopic compositions of meteorites and the regularity of the planetary orbits, we constrain the star formation environment of the Sun within the scenario of (external) radioactive enrichment by a massive star. This calculation yields a probability distribution for the number of stars in the solar birth aggregate. The Sun is most likely to have formed within a stellar group containing N=〈N〉≈2000±1100 members. The a priori probability of a star forming in this type of environment is P≈0.0085; i.e., only about 1 out of 120 solar systems are expected to form under similar conditions. We discuss additional implications of this scenario, including possible effects from the radiation fields provided by the putative cluster environment and dynamical disruption of the Kuiper Belt. The constraints of this paper place tight restrictions on the properties of the solar birth aggregate for the scenario of external enrichment by a massive star; alternately, these tight constraints slightly favor a self-enrichment scenario for the short-lived radioactive species.