行星系统的动力震动II。长期共振扫描诱导太阳系类地行星形成的N体模拟
Dynamical Shakeup of Planetary Systems II. N-body simulations of Solar System terrestrial planet formation induced by secular resonance sweeping
摘要：
我们重新审视了太阳系陆地行星形成的“动力学震荡”模型，其中整个过程是由木星长期共振的扫描驱动的，因为气体盘被移除。使用大量的0.5 Gyr-long N体模拟，我们调查了这种情况下产生的不同结果。我们确认，在现有的模型相比，长期共振扫描结合潮汐阻尼盘气体可以重现低偏心率和倾角，高径向质量浓度，太阳系类地行星。与此同时，这也推动了行星在数千万年的时间尺度上的最终聚集，比以前忽略这些影响的数值模拟推断的速度快一个数量级，但可能与从宇宙化学数据推断的时间尺度更一致。此外，我们发现，从外部小行星带大量输送的富含水的物质是一种自然的副产品。
英文摘要：
We revisit the "dynamical shakeup" model of Solar System terrestrial planet formation, wherein the whole process is driven by the sweeping of Jupiter's secular resonance as the gas disk is removed. Using a large number of 0.5 Gyr-long N-body simulations, we investigate the different outcomes produced by such a scenario. We confirm that in contrast to existing models, secular resonance sweeping combined with tidal damping by the disk gas can reproduce the low eccentricities and inclinations, and high radial mass concentration, of the Solar System terrestrial planets. At the same time, this also drives the final assemblage of the planets on a timescale of several tens of millions of years, an order of magnitude faster than inferred from previous numerical simulations which neglected these effects, but possibly in better agreement with timescales inferred from cosmochemical data. In addition, we find that significant delivery of water-rich material from the outer Asteroid Belt is a natural byproduct.
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