October 25, 2021 Presentation Open Access

Antoine Petit

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{
  "publisher": "Zenodo", 
  "DOI": "10.5281/zenodo.5596398", 
  "language": "eng", 
  "title": "Spacing and stability of compact systems", 
  "issued": {
    "date-parts": [
      [
        2021, 
        10, 
        25
      ]
    ]
  }, 
  "abstract": "<p>Exoplanet transit surveys have revealed the existence of numerous<br>\nmulti-planetary systems packed close to their stability limit. This feature<br>\nlikely emerges from the formation and dynamical history of the system.<br>\nUnderstanding it in detail is thus key to constrain our planet formation<br>\nscenarios. While the stability limit has been known empirically for decades,<br>\nno theoretical explanation was proposed yet. I present a mechanism driving<br>\nthe instability of tightly packed system. Based on the chaotic diffusion<br>\nalong the network of three-planet resonances, it reproduces quantitatively<br>\nthe timescale of instability obtained numerically over several order of<br>\nmagnitude in time and planet-to-star mass ratios. I discuss the observational<br>\nimplications of this model, in particular the expected differences between<br>\nSuper-Earths and terrestrial planet systems.</p>", 
  "author": [
    {
      "family": "Antoine Petit"
    }
  ], 
  "type": "speech", 
  "id": "5596398"
}