The Influence of Giant Planets Near a Mean Motion Resonance on Earth-like Planets in the Habitable Zone of Sun-like Stars
The Influence of Giant Planets Near a Mean Motion Resonance on Earth-like Planets in the Habitable Zone of Sun-like Stars
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DOI：
10.1086/587501
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发表时间：
2008-07
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影响因子：
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通讯作者：
E. Pilat-Lohinger;Á. Süli;P. Robutel;F. Freistetter
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文献类型：
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作者：
E. Pilat-Lohinger;Á. Süli;P. Robutel;F. Freistetter
我们对几个基于木星和土星运动的双行星系统进行了数值研究，在这些系统中，两颗巨行星在接近平均运动共振的低偏心轨道上运动。在一个系统中发现两颗具有相似特征的行星的可能性比我们太阳系中木星-土星对的克隆更大。因此，我们通过将土星的半长轴从8 AU改变到11 AU，并将其质量增加2-40倍来改变两颗行星之间的距离和它们的质量比。分析了由于巨行星的平均运动共振而产生的相互作用扰动。我们选择了几个气态巨星的质量比，研究了它们对在类太阳恒星的宜居带(HZ)中运动的测试体(质量可以忽略不计)的影响。计算了2×107年的轨道。在所有情况下，HZ都被一个显著的曲线带所主导，这表明偏心率更高，这对应于与木星的长期共振。这项研究的有趣结果是发现(1)对于真实的木星和土星质量以及土星的实际半长轴，金星的偏心率增加；(2)当土星的质量增加3倍或更多时，测试行星在地球位置的偏心率增加；(3)如果两颗巨行星处于2：1共振，我们观察到对HZ外部区域的强烈影响。
We present a numerical study of several two-planet systems based on the motions of Jupiter and Saturn, in which the two giant planets move in low eccentric orbits close to a mean motion resonance. It is more likely to find two planets with similar characteristics in a system than a clone of the Jupiter-Saturn pair of our solar system. Therefore, we vary the distance between the two planets and their mass ratio by changing Saturn’s semimajor axis from 8 to 11 AU and increasing its mass by factors of 2-40. The different two-planets were analyzed for the interacting perturbations due to the mean motion resonances of the giant planets. We select several mass ratios for the gas giants, for which we study their influence on test bodies (with negligible mass) moving in the habitable zone (HZ) of a Sun-like star. The orbits are calculated for 2 × 107 yr. In all cases the HZ is dominated by a significant curved band, indicating higher eccentricity, which corresponds to a secular resonance with Jupiter. Interesting results of this study are finding (1) an increase of Venus’s eccentricity for the real Jupiter and Saturn masses and the actual semimajor axis of Saturn; (2) an increase of the eccentricity of a test planet at Earth’s position when Saturn’s mass was increased by a factor of 3 or more; and (3) if the two giant planets are in 2:1 resonance, we observe a strong influence on the outer region of the HZ.