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arXiv 2302.06641astro-ph.EP
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超级地球在太阳系中的动力学后果

The Dynamical Consequences of a Super-Earth in the Solar System

Stephen R. Kane

摘要:

将太阳系的结构置于行星结构的更广泛的背景下是行星科学中感兴趣的主要主题之一。系外行星的发现揭示了大范围的系统结构,其中许多与太阳系模型有很大的不同。系外行星人口统计的一个特殊特征是超级地球行星的相对普遍性,太阳系缺乏合适的模拟,这对模拟其内部和大气层提出了挑战。在这里,我们提出了一个大的动力学模拟,插入一个假设的行星在半长轴范围2-4 AU,火星和木星的轨道之间的质量范围1-10 $M_\oplus$的结果。我们表明,虽然系统动力学基本上不受影响时,额外的行星被放置在3 AU附近,水星经历了很大的不稳定性时,额外的行星位于3.1-4.0 AU的范围内,和扰动的火星轨道主要结果时,额外的行星位于2.0-2.7 AU的范围内。我们进一步表明,虽然木星和土星经历相对较小的轨道扰动,转移到冰巨人的角动量可能会导致他们从系统中的额外行星的关键共振位置喷射。我们讨论的影响,这些结果的架构的内部和外部的太阳系行星,和系外行星系统。

英文摘要:

Placing the architecture of the Solar System within the broader context of planetary architectures is one of the primary topics of interest within planetary science. Exoplanet discoveries have revealed a large range of system architectures, many of which differ substantially from the Solar System model. One particular feature of exoplanet demographics is the relative prevalence of super-Earth planets, for which the Solar System lacks a suitable analog, presenting a challenge to modeling their interiors and atmospheres. Here we present the results of a large suite of dynamical simulations that insert a hypothetical planet in the mass range 1-10 $M_\oplus$ within the semi-major axis range 2-4 AU, between the orbits of Mars and Jupiter. We show that, although the system dynamics remain largely unaffected when the additional planet is placed near 3 AU, Mercury experiences substantial instability when the additional planet lies in the range 3.1-4.0 AU, and perturbations to the Martian orbit primarily result when the additional planet lies in the range 2.0-2.7 AU. We further show that, although Jupiter and Saturn experience relatively small orbital perturbations, the angular momentum transferred to the ice giants can result in their ejection from the system at key resonance locations of the additional planet. We discuss the implications of these results for the architecture of the inner and outer solar system planets, and for exoplanetary systems.

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