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arXiv 0911.0924astro-ph.EP
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锁定在3:2平均运动共振中的超级地球

On the Super-Earths locked in the 3:2 mean-motion resonance

A. Łacny, E. Szuszkiewicz

摘要:

Papaloizou和Szuszkiewicz(2005)首次研究了一对类地行星的迁移引起的共振。他们的结论是,如果不同的质量嵌在一个圆盘中,而圆盘的表面密度预计是最小质量太阳星云的5.2 au,那么最有可能的共振是大整数的比率,比如8:7。对于相同的质量,行星倾向于进入2:1或3:2共振。在Papaloizou和Szuszkiewicz(2005)中,两颗低质量行星的质量相当于4个地球质量,选择它们来模仿非常著名的两颗脉冲星行星的例子,它们接近3:2共振。这项研究引发了不少有趣的问题。这里考虑其中之一,即接近平均运动共振的行星的行为如何取决于行星质量的实际值。我们选择了一个3:2的可伸缩性,并研究了在一对质量相等的超级地球(其质量为5或8个地球质量)的情况下,在这种共振附近的轨道迁移的结果。

英文摘要:

The first study of migration-induced resonances in a pair of Earth-like planets has been performed by Papaloizou and Szuszkiewicz (2005). They concluded that in the case of disparate masses embedded in a disc with the surface density expected for a minimum mass solar nebula at 5.2 au, the most likely resonances are ratios of large integers, such as 8:7. For equal masses, planets tend to enter into the 2:1 or 3:2 resonance. In Papaloizou and Szuszkiewicz (2005) the two low-mass planets have masses equal to 4 Earth masses, chosen to mimic the very well known example of two pulsar planets which are close to the 3:2 resonance. That study has stimulated quite a few interesting questions. One of them is considered here, namely how the behaviour of the plan- ets close to the mean-motion resonance depends on the actual values of the masses of the planets. We have chosen a 3:2 commensurability and investigated the outcome of an orbital migration in the vicinity of this resonance in the case of a pair of equal mass super-Earths, whose mass is either 5 or 8 Earth masses.

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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