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arXiv 0802.0062astro-ph
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在气体巨行星存在下热超级地球的迁移和最终定位

Migration and Final Location of Hot Super Earths in the Presence of Gas Giants

Ji-Lin Zhou, Douglas N. C. Lin

摘要:

基于传统的序贯吸积范式,我们提出,在第一个出生的气体巨星迁移到行星胚胎轨道之外的过程中,超级地球行星将通过平均运动共振的扫描在2:1共振位置内形成(Zhou et al. 2005)。本文研究了超级地球(m_1)在潮汐耗散和外轨道上第一颗气体巨星(m_2)扰动作用下的演化。m_1和m_2之间的长期摄动和平均运动共振(特别是2:1和5:2共振)激发了m_1的偏心率,从而引起m_1的迁移,导致热超级地球的产生。计算的热超级地球的最终位置与潮汐能量耗散因子Q '无关。研究热超级地球的迁移历史有助于揭示它的Q'值,并预测它在一个或多个热气巨星存在下的最终位置。将这一研究应用于GJ876系统,正确地再现了GJ876d在0.02AU附近的观测位置。

英文摘要:

Based on the conventional sequential-accretion paradigm, we have proposed that, during the migration of first-born gas giants outside the orbits of planetary embryos, super Earth planets will form inside the 2:1 resonance location by sweeping of mean motion resonances (Zhou et al. 2005). In this paper, we study the subsequent evolution of a super Earth (m_1) under the effects of tidal dissipation and perturbation from a first-born gas giant (m_2) in an outside orbit. Secular perturbation and mean motion resonances (especially 2:1 and 5:2 resonances) between m_1 and m_2 excite the eccentricity of m_1, which causes the migration of m_1 and results in a hot super Earth. The calculated final location of the hot super Earth is independent of the tidal energy dissipation factor Q'. The study of migration history of a Hot Super Earth is useful to reveal its Q' value and to predict its final location in the presence of one or more hot gas giants. When this investigation is applied to the GJ876 system, it correctly reproduces the observed location of GJ876d around 0.02AU.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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