{
  "id": "2006.14506",
  "version": "v1",
  "published": "2020-06-25T15:54:16.000Z",
  "updated": "2020-06-25T15:54:16.000Z",
  "title": "Near Mean Motion Resonance of Terrestrial Planet Pair Induced by Giant Planet: Application to Kepler-68 System",
  "authors": [
    "Mengrui Pan",
    "Su Wang",
    "Jianghui Ji"
  ],
  "comment": "13 pages, 8 figures, accepted for publication in MNRAS",
  "categories": [
    "astro-ph.EP"
  ],
  "abstract": "In this work, we investigate configuration formation of two inner terrestrial planets near mean motion resonance (MMRs) induced by the perturbation of a distant gas-giant for the Kepler-68 system, by conducting thousands of numerical simulations. The results show that the formation of terrestrial planets is relevant to the speed of Type I migration, the mass of planets, and the existence of giant planet. The mass and eccentricity of the giant planet may play a crucial role in shaping the final configuration of the system. The inner planet pair can be trapped in 5:3 or 7:4 MMRs if the giant planet revolves the central star with an eccentric orbit, which is similar to the observed configuration of Kepler-68. Moreover, we find that the eccentricity of the middle planet can be excited to roughly 0.2 if the giant planet is more massive than 5 $M_J$,otherwise the terrestrial planets are inclined to remain near-circular orbits. Our study may provide a likely formation scenario for the planetary systems that harbor several terrestrial planets near MMRs inside and one gas-giant exterior to them.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-06-25T15:54:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mean motion resonance",
      "terrestrial planet pair",
      "application",
      "inner terrestrial planets",
      "configuration"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}