THE COMPOSITIONAL DIVERSITY OF EXTRASOLAR TERRESTRIAL PLANETS. I. IN SITU SIMULATIONS
THE COMPOSITIONAL DIVERSITY OF EXTRASOLAR TERRESTRIAL PLANETS. I. IN SITU SIMULATIONS
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DOI：
10.1088/0004-637x/715/2/1050
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发表时间：
2010-06-01
影响因子：
4.9
通讯作者：
Lauretta, Dante S.
中科院分区：
文献类型：
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作者：
Bond, Jade C.;O'Brien, David P.;Lauretta, Dante S.
太阳系外行星的宿主恒星被发现富含关键的行星形成元素。这些浓缩有可能大大改变可用于形成类地行星的物质的组成。在这里，我们报告的动力学模型相结合的后期阶段的类地行星形成已知的太阳系外行星系统与化学平衡模型的组成的磁盘内的固体物质。这使我们能够确定模拟的太阳系外类地行星的大量元素组成。结果发现了各种各样的行星组成，从那些基本上是“地球一样”的，含有金属铁和镁硅酸盐，到那些主要由石墨和SiC组成的。这表明，在太阳系外的行星系统中可能存在各种各样的类地行星。
Extrasolar planet host stars have been found to be enriched in key planet-building elements. These enrichments have the potential to drastically alter the composition of material available for terrestrial planet formation. Here, we report on the combination of dynamical models of late-stage terrestrial planet formation within known extrasolar planetary systems with chemical equilibrium models of the composition of solid material within the disk. This allows us to determine the bulk elemental composition of simulated extrasolar terrestrial planets. A wide variety of resulting planetary compositions are found, ranging from those that are essentially "Earth like," containing metallic Fe and Mg silicates, to those that are dominated by graphite and SiC. This shows that a diverse range of terrestrial planets may exist within extrasolar planetary systems.