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arXiv 2001.07611astro-ph.EP
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邻近行星在内太阳系共振尘埃环形成中的作用

Effects of neighbouring planets on the formation of resonant dust rings in the inner Solar System

Maximilian Sommer, Hajime Yano, Ralf Srama

摘要:

上下文太阳神号和立体声探测器的发现表明,金星上存在着一个由尘埃组成的共振环。试图将这种现象模拟为地球的共振环-作为外部平均运动共振(MMR)中捕获的迁移尘埃的结果-迄今为止无法重现所观察到的尘埃特征。最近提出了其他起源理论。然而,金星外部MMR捕获效率低的原因仍然不清楚。目标。在这里,我们将探讨内太阳系多行星结构中尘埃捕获共振现象的本质,旨在增加对单行星系统中共振尘埃环的现有理解。方法.我们对与内行星相关的共振尘埃特征进行了数值模拟,并特别研究了这些结构的依赖性以及特定共振对行星配置的捕获效率。结果除了水星与迁移的尘埃云没有共振相互作用外,我们还发现金星、地球和火星之间的共振相互干扰,影响了它们形成环日光环的能力。我们发现,金星外部MMR环薄弱的唯一最重要的原因是其外部邻居-地球的扰动影响。此外,我们发现水星和火星产生新月形的密度特征,这是由穿过其轨道区域的粒子发生的定向拱点进动造成的。

英文摘要:

Context. Findings by the Helios and STEREO mission have indicated the presence of a resonant circumsolar ring of dust associated with Venus. Attempts to model this phenomenon as an analogue to the resonant ring of Earth - as a result of migrating dust trapped in external mean-motion resonances (MMRs) - have so far been unable to reproduce the observed dust feature. Other theories of origin have recently been put forward. However, the reason for the low trapping efficiency of Venus's external MMRs remains unclear. Aims. Here we look into the nature of the dust trapping resonant phenomena that arise from the multi-planet configuration of the inner Solar System, aiming to add to the existent understanding of resonant dust rings in single planet systems. Methods. We numerically modelled resonant dust features associated with the inner planets and specifically looked into the dependency of these structures and the trapping efficiency of particular resonances on the configuration of planets. Results. Besides Mercury showing no resonant interaction with the migrating dust cloud, we find Venus, Earth, and Mars to considerably interfere with each other's resonances, influencing their ability to form circumsolar rings. We find that the single most important reason for the weakness of Venus's external MMR ring is the perturbing influence of its outer neighbour - Earth. In addition, we find Mercury and Mars to produce crescent-shaped density features, caused by a directed apsidal precession occurring in particles traversing their orbital region.

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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